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  1. Stax Audio of Japan was founded in 1938 to make electronic equipment and in 1959, they released the first ever electrostatic (ES) stereo, high-fidelity headphones (Stax calls them “Earspeakers”), the SR-1. Since then, Stax has gone through a number of owners, and business models. They have made everything from amplifiers to CD players to DACs. In the 1980’s Stax made a fairly impressive line of electrostatic speakers and they were very highly regarded. Today, Stax is owned by a Hong-Kong based company, Edifier International Ltd, but the manufacturing of Stax equipment is still done in Japan. The new owners have refocused Stax exclusively towards Earspeakers, Amplifier/Energizers to power them and Earspeaker accessories. Recently, Stax has introduced two new amplifier/energizers for electrostatic ‘phones. These almost identical looking amps are called the SRM-700T (tube version) and the SRM-700S (solid-state version). Both of these amps are priced at US$3400, and the output stages are the only difference between them. While the “S” model uses FETs to drive the ‘phones and the “T” model uses a pair of 6SN7 dual triodes as output devices. Outwardly, the two new amps strongly resemble the older Stax amp/energizer called the SRM-007tII (still available at US$1780). Like the new SRM-700T, this amp uses a tube output, but in the case of the older design, the tube in question is a single 6FQ7/6CG7, a dual triode (half for the right channel and half for the left). The SRM-700T vs the SRM-007tII The SRM-700T/S and the older SRM-007tII look almost identical, physically. The two new amps are roughly the same size and shape with the dimensions of 240mm (9.45 inches) W x 103mm (4.1 inches) H x 393mm (15.5 inches) D overall with a weight of 5.7 Kg (12.6 pounds) for the SRM-700T/S. The size of the SRM-007tII is only slightly different in overall dimensions and weight and the front panel layouts of the two are almost identical. SRM-700T Layout, Front and Rear From left to right the layout of the SRM-700T starts with a push on/push off switch. Next comes two 5-pin electrostatic headphone jacks which were, until fairly recently, a Stax proprietary design. Now, several electrostatic headphone manufacturers use it including HiFiMan for their Jade2, and Dan Clark’s (formerly Mr. Speakers) Voce model electrostatic phones. Stax calls this their “Pro” Earspeaker connection, and applies to the pinout as well as the bias voltage (a nominal 580 VDC in this case). Any headphone or headphone amplifier manufacturer wishing to use this connector and this spec may follow this protocol. There is even an adapter to allow the Koss ESP950 electrostatic phones to be used with the Stax “Pro” spec amplifiers such as the SRM-700T or S models. A combination connection adapter and 68 inch long extension cord, at US$180, it’s not cheap but I have an acquaintance who uses a pair of Koss ESP950s with the original Stax SRM-007t of 20 years ago and he says that the adapter, though expensive, is well worth the price because the Koss ‘phones sound so much better through the Stax amp than they do through the supplied Koss unit. To the right of the two ‘phone connections is the concentric volume knob. This allows the user to vary the balance between the two channels by holding one knob section while turning the other. The two sections of the volume control are “clutched”, so that they will both turn together unless one is held while the other is turned. This allows any balance corrections to be maintained as the overall volume is adjusted. Above the controls are two LEDs, one is red and marked “External (Bypass)” and the other is green and located above the center of the volume control. It is marked “Internal”. This refers to the ability of the user to bypass the volume control of these amps in case the headphones are being driven by a variable volume control output on one’s system preamp or amplifier. This control is on the rear panel of both amps. Between the ‘phone jacks and the volume control is located another pair of LEDs marked “Source” a green LED denotes that the user is connected to the rest of his/her system via a balanced XLR pair. The blue LED indicates that one is using unbalanced RCA jacks to connect to one’s system. The rear panel of the SRM-700T and S amps, again, from left to right, consists of a stacked pair of female XLR (sometimes called Cannon connectors) sockets for left and right balanced connections. To the immediate right of the two XLRs is a rotary two position switch with a small knob on it. In the left position, the knob points to the XLR connectors and indicates that they have been selected as the source for the headphone amplifier, and when switched to the right, the knob points to the pair of stacked RCA jacks indicating that the unbalanced connection is being used. Moving to the right again, there is a second pair of RCA jacks labeled “Parallel out” which means, ostensibly, that when using the amp in an unbalanced mode, the amp may be “daisy chained” with another component such as another headphone amp. To the right of the two pairs of RCA jacks is still another two position rotary switch. This one is marked “Internal” and “External (Bypass)”. These legends refer to the ability to use the Stax amps without the volume control. As pointed out above, this is useful when one is connected to one’s system’s amp or preamp and wants to use the main system volume control on one’s Earspeakers. The switch is accompanied by a warning label to the effect that in the external mode, the front panel mounted volume control does not work. This means that if the amp is connected to an un controlled line-level source, that the Stax amps will deliver full volume to the Earspeakers, possibly damaging them. Finally, there is an IEC connector for the mains (household power) cable. SRM-700T Evaluation Process To evaluate the SRT-700T I used four electrostatic headphone types. From Stax, I used both the new flagship SR-009S and the SR-L300. From HiFiman I used the Jade2 headset, and from Dan Clark, I used the Voce electrostatic headphones. All of these phones conform to the Stax “Pro” spec and are therefore fully compatible with the SRM-700T amplifier/energizer. Although I briefly listened to the SRM-700T using the unbalanced (RCA) inputs connected directly to my Schiit Yggdrasil DAC, I did the majority of my listening via a 25 foot (7.62m) long pair of Mogami balanced cables with XLRs. The Sound of the SRM-700T I’ve never heard the solid state version of this amplifier. So my comments apply only to the tube version. I was able to compare this unit to the $7000 Linear Tube Audio (LTA) Z10e OTL amp and the HiFiMan Jade 2 solid-state amplifier. I also compared the SRM-700T with the SR-009S headphones to the LTA amp with the same SR-009S. I was also able to compare the Stax setup to the combination of the Headamp GS-X MkII headphone amp driving a pair of Abyss AB-1266 Phi TC phones in the balanced configuration (review in progress). There are certain things that one expects from an electrostatic headphone setup, and indeed one does not expect that any dynamic phones would stand up to the large diaphragm area of the ES phones or the speed, transient response and high-frequency extension, coupled with the low distortion inherent in the ES push-pull drive. But lately, with the advent of new materials and techniques, many dynamic phones approach the sound of a good pair of ES phones with amazing results. However, none, in my experience, come as close as the Abyss AB-1266 phones. While these very expensive planar dynamic phones through the Headamp amplifier come close to matching the sound quality and presentation of the Stax SR-009S through the SRM-700T, the electrostatics still have the edge in terms of speed and overall intimacy of sound. The Stax throws a wider, deeper soundstage and this is mostly due to the amplifier. When plugged into the HiFiMan Jade2 solid state amp, that wide, deep soundstage diminishes considerably. The Voce ‘phones exhibit some of this uncanny imaging performance when connected to the SRM700T and the Stax SR-L300s (see review posted February 21st) are very close to the SR-009S in this regard. Clearly getting the soundstage correct is a Stax characteristic, it seems, and one they share with the LTA Z10e. Both of these throw the widest deepest soundstage that I have ever heard from headphones, and do it with pinpoint image specificity with the sound appearing to wrap from left to right outside of the listener’s head! To say that this effect is somewhat spooky would be an understatement. I’ve never heard a pair of dynamic phones even come close except for the Abyss with the Headamp GSX-mk2, which together, come close to the SR-009S in this regard. The Abyss/GSX-mk2 duo lists for around US$8,000. The combination of the Stax SRM-700T and the SR-009S phones is US$7795, so price-wise, I’d say that the difference in cost between the two is negligible. One of my favorite recordings is the Angel Cabrera plays Debussy album from our own Mario Martinez’ Playclassics.com catalog. This is without a doubt the best, most realistic recording of a single grand piano that I have ever heard (Cabrera is a first class concert pianist, by the way. Not flashy like your modern young turks who win piano competitions, but rather he conveys a sense of style, coupled with a reverence for the material and a seriousness of purpose that makes me think of a Rubinstein or a Horowitz). Through the Stax duo, this 24/96 performance ceased to be a recording. I completely “forgot” that I was listening to a recorded piano and for all intents and purposes, Cabrera’s piano was sitting right in front of me out there in the dark! I was totally enthralled by the performance (as always) but now I found the sound that I was hearing to be an equally immersive experience. The attack on the keys by Cabrera comes across with the right amount of speed and a subtle, but clear impression of the mechanism of the piano working to create this sound – just as it would do in a real recital venue. Many modern piano recordings place microphones too close to the open grand piano lid or in some cases, even inside of the piano, both of which exaggerate the sound of the mechanism (and produce a piano image that’s 10 feet wide!). The transient response of the Earspeakers and the warm, clean sound of the amplifier coupled with the almost distortionless presentation of the push-pull drive on these phones removes so many layers of veil from the presentation that are normally there with other headphone systems that if Salome were in the room, she would be down to, at most, only one of her seven veils! Moving on to a recent acquisition (or I should say re-acquisition), a vinyl album by a Nashville pick-up jazz ensemble headed by Ferrell Morris with Stan Getz on tenor sax, Ron Carter on bass, Craig Nelson on both acoustic and electric bass (gotta wonder. Is this Craig T. Nelson, the actor? Nah! Couldn’t be) and many more well known sidemen. It is called Bits of Percussion, and this recording, never released on a CD, was made by a now defunct organization calling itself “Audio Directions." It’s catalog number is AD-102 if you want to search for a copy. It was recorded in 1979 on a Sony PCM-1600. Now, I know this piece of equipment intimately because I once had access to one (it belonged to a friend) and we made many a recording together with it. I was not impressed with the sound at the time, and was convinced that digital would never eclipse a good analog tape recorder with half-track heads and a recording speed of 38cm/sec (15ips). Boy was I wrong! But somehow, this particular recording exhibits none of the hardness and digital glare that I normally associate with this piece of equipment. Perhaps transferring it to vinyl tamed the digital gremlins; I don’t know. What I do know is that this is one of the best sounding and most approachable jazz recordings I’ve heard. On The cut, The Lamp Is Low (based on Debussy’s Pavane pour une infante défunte) the exotic percussion just sparkles through the SRM-700T. It doesn’t matter in this regard whether one is listening with either of the Stax headsets or the Dan Clark Voce or the HiFiMan Jade2 ‘phones, the highs have a bite and a transient quickness that no dynamic phone of my knowledge can match. I don’t even think that the aforementioned Abyss/Headamp combo can match the transient response of the Stax amp and either the SR-009S or the SR-L300 ‘phones (in spite of the fact that this dynamic headphone ensemble is among the top two or three headphone setups I’ve ever heard). But I’m going by past experience with the Abyss/GSX-mk2. I don’t have it in my possession at this time to be able to directly compare on this recording. Delineation of line between the various instruments with the SRM-700T is uncanny and something I’ve never heard before with this recording. The Stax amp allows me to hear deeper into the ensemble than ever before and this is the second copy of this record that I have owned (the first was “loaned” to someone and I forgot to whom I loaned it – and apparently, so did they!). The first copy I had I listened to often for about 30 years. I was happy to find another copy on Amazon. In closing, I’d like to say, that if you enjoy the virtues of electrostatic headphone listening, you’re going to need a good amplifier/energizer for the task. Skimping here is simply not an option. While there are a number of such amps available to the modern audio enthusiast, one would do well to choose one that conforms to the Stax “Pro” standard for both connector pinout and biasing voltage. Solutions are available from the aforementioned Headamp brand (although the GSX-mk2 model, mentioned above, is not designed for electrostatic phones, Headamp makes, as I recall, two models that are specifically for Stax-type headphones), Woo Audio, IfI and several others, also make Stax compatible ES headphone amps. In my experience it comes down to the two top-tier models that I have lived with for some extended amount of time: the very expensive LTA Z10e or the more reasonable Stax SRM-700T (or it’s sibling Solid State version). You can’t go wrong with either, although the Stax, while being the less expensive of the two will power a second set of ‘phones, the LTA has only one ES jack, but it does have the option of two dynamic headphone ports in addition, and it will drive a pair of very efficient speakers with about 12 Watts RMS/channel. That probably accounts for, and surely justifies, the almost twice the price of the Stax SRM-700T/S. By the way, of the ES phones used in this evaluation, I have ranked them with regard to my opinion of their sound quality. (1) Stax SR-009S, (2) Stax SR-L300, (3) HiFiMan Jade2, (4) Dan Clark Voce. The Abyss AB1266 Phi TC are not ES phones, so they aren’t in the ranking, but they are every bit the equal of the Stax flagship, the SR-009S. But understand that these two phones could not be more different in their presentation and which anyone would choose over the other is a matter of personal taste. I know which one I would choose! Cheers! Community Star Ratings and Reviews I encourage those who have experience with the Stax Audio SRM-700T to leave a star rating and quick review on our new Polestar platform. Product Information: Stax Audio SRM-700T Amplifier / Energizer ($3,400) Stax Audio SRM-700T Amplifier / Energizer Product Page
  2. Linear Tube Audio or LTA, is an American company based in Takoma Park Maryland, a suburb of Washington DC. The company, which was founded in 2015 by engineer Mark Schneider, specializes in tube-based audio amplifiers employing David Berning’s patented ZOTL output-transformer-less amplifier designs. Most of LTA’s amplifiers are low-power offerings of 10 to 20 Watts per channel, and their biggest amps are a design providing about 50 Watts per channel. LTA sells only direct-to-consumer and has no dealer network. Customers deal directly with the manufacturer. The LTA Z10e As far as this reviewer knows, the Z10e is a unique product in the annals of audio design. It’s a headphone amplifier designed for electrostatic headphones, but it will also drive magnetic headphones as well as a high efficiency pair of speakers! But more about these incredible capabilities later. The primary purpose of this tube-based device is to drive a pair of Stax or Stax “pro-bias” compatible Electrostatic headphones. Physical Description The Z10e Consists of two chassis. The larger one is the amplifier, and its dimensions are 12.75” (32.4cm) wide, X 14.5” (36.8cm) deep X 6.5” (16.5cm) high with a weight of 18 pounds (8.2 kg). The smaller unit, is the power supply, the dimensions of which are 4.75” (12cm) wide X 7.5” (19cm) deep X 4.25” (10.8cm) high and weighs 5 pounds (2.3kg). The two chassis are connected together using a supplied proprietary umbilical cord. Front Panel The Z10e’s front panel consists, from left-to-right an illuminated push button standby/operate button (the system power switch is on the power supply), a three position toggle switch to select between it’s three inputs (two unbalanced Cardas gold plated RCA jacks) and a pair of two-way XLR/1/4-inch balanced input jacks). These are followed by a large, stepped volume control. To the right of the volume control is located another toggle switch which selects between speakers and headphones (about which, more, later). Below the switch is located the single Stax Professional 5 pin electrostatic headphone jack. Finally, on the extreme right, there is a large two-digit alpha/numeric LED display and directly below that are two normal 1.25-inch magnetic headphone jacks marked “Hi” and “Lo” respectively. Rear Panel Again, from left-to-right, the rear panel consists of a 4-pin proprietary power supply input jack, and on the far right, top-to-bottom are two sets of unbalanced RCA jacks, followed on the extreme right by a pair of balanced two-way XLR plug female connectors, and below those are a set of four WBT 5-way binding posts for a stereo pair of speakers. The Power Supply The front panel of the separate power supply box (PS) has only one control and this is the power on/off switch and the power output port for the supplied umbilical cord. The rear panel contains the IEC power cord connector and a fuse holder. Operation After unpacking both of the two boxes in which the Z10e came packaged, I set the power supply box on the floor and set the main chassis on a small table next to my listening chair where my HiFiMan amp for my personal Jade 2 electrostatic headphones normally resides. I connected the included IEC power cord to the PS and the house mains and the umbilical cord between the two chassis. Next I connected the pair of balanced XLR cables from the balanced output of my Schiit Yggdrasil DAC which is located on my equipment rack across the room from my listening chair and is normally connected to my Jade 2s. I used balanced cables to connect the Z10e because I have to route my connection to the rest of my system around the periphery of my listening room. I turned on the main power on the PS box and switched the main chassis from standby to operate. Immediately, the LED display came alive with a marching banner that informed me that the unit was warming up. After an interval of a minute or so, the display changed to a two digit number reflecting the position of the volume control. Pushing the “input” switch on the front panel to its down position (of three possible settings) selects the balanced input. Making sure that that the speaker/headphone switch to the right of of the large volume knob, is set to “headphones” and reducing the volume control to a low number on the display, I plugged my Jade 2 headphones into the single electrostatic headphone jack to the right of the volume knob. The volume control on the Z10e is a 100 step attenuator using discrete resistors that are relay-switched. The smallest step of the attenuator is 1/1000th of the total value and the amp employs Vishay Dale 1% precision resistors for accurate and repeatable volume settings. The LTA Z10e Conforms to the Stax electrostatic headphone specification that Stax calls the “pro-bias” standard. This is a five-pin connector interface providing 580 volts of DC bias for the phones. This means that any electrostatic phone conforming to this standard can be used with this amplifier. This includes (but is not restricted to) Stax SR-007 MKII, SR-009 series, all of the Stax Lambda series, the HiFiMan Shangra-La and Shangra-La Jr phones and the Jade 2 phones, as well as the Mr. Speakers (now Dan Clark brand). There are a number of electrostatic headphones that are not compatible with this amp and these include the Koss ESP-950, the Monoprice electrostatic line, and the Sonore phones. This amp also, uniquely, for an electrostatic headphone amp, has two ¼-inch standard phone jacks to accept normal magnetic headphones such as the HiFiMan planar magnetic line, the Audeze line, the Sennheiser HD-800 and HD-650, Sony’s line of magnetic headphones, etc. There are two jacks because one is designed for low efficiency phones and is labeled “Hi” for its output and can source phones that are seen as hard to drive with an output of approximately 2 Watts into a 50Ω load. This is ideal for phones like the HiFiMan Susvara which are notoriously difficult to drive. The other jack, marked “Lo” is designed for very high efficiency such as any with a rating of 93 dB or better such as the HiFiMan Ananda (93dB) and the Sony MDR-1AM2 (98dB). We now come to what is possibly the most unusual aspect of the Z10e’s unique design. As shown earlier, this LTA electrostatic headphone amp has, on it’s rear panel, a left and right pair of high quality German-made WBT 5-way binding posts. These are there to supply 12 Watts of class-AB power, per channel (at 8Ω), to a pair of speakers! The heart of this amp is the Berning ZOTL output transformer-less stereo amplifier circuit sporting four EL84 (6BQ5) beam-power pentodes which can drive any speaker with an efficiency of 90dB/Watt at 1 meter or better. This means that depending on one’s speaker selection, this US$6,950 unit can serve as the heart of a complete stereo system. The unique design of this amplifier allows for a long tube life of about three times of normal tube amplifiers and generates about 1/3 of the heat output. When changing tubes, they do not need to be matched. All front-panel functions of the Z10e are accessible using the enclosed Apple hand-held remote control. This includes standby/operate, input selection, volume, and selecting between headphones or speakers. In addition, the remote can be used to set a fixed output for any selected input (for home theater operation) or to choose any of 16 different brightness levels for the display as well as programming the display timeout for 10 seconds (normally, it’s on all the time). I was able to check this aspect of the Z10e’s performance because even though my review sample did not come with a user’s manual, I was able to find one on LTA’s web site. Hopefully, the retail version does come with a full set of printed instructions (my sample was S/N 009). I must say however, that putting aside, for the moment, the lack of a printed manual, that the Z10e is quite intuitive in its set-up and operation and can be easily configured by any seasoned audiophile. Sonic Performance As A Power Amplifier Before discussing this unit as a headphone amp, I will describe its sonic attributes as a power amplifier for speakers. I don’t have any speakers that can get by on 12 Watts per channel, but a good friend of mine owns a pair of Wilson Audio Cub 2 speakers which, with a published sensitivity of 94dB/Watt at one meter, and a recommended minimum power requirement of 10 Watts, falls within the guidelines for this amplifier. Moving the amp to his listening room, and connecting it to his Cub 2’s showed that even though rated at a mere 12 Watts, the Z10e produces a very big 12 Watts! The LTA amp will drive these speakers to ear-splitting volumes if desired, and at even very realistic listening levels, the Z10e produced an excellent, well controlled bottom end, a gorgeous, liquid midrange and silky highs. Distortion was audibly non-existent and the amp seemed to have plenty of headroom even on demanding orchestral music. My friend, who usually drives the Cub 2’s with a high-powered Spectral amp rated at 200 Watts/channel, was reluctant for us to return the LTA to my abode. It’s that good. Magnetic Headphone Performance I was anxious to try several pairs of magnetic ‘phones on this amp, to see how they fared. I started with a pair of HiFiMan Edition X, V.2. These phones have an efficiency of 103 dB and therefore are easily driven by a cell phone or iPod. I plugged them into the “LO” headphone jack and listened to Rozsa’s Violin Concerto with Jascha Heifetz and the Dallas Symphony via Tidal. I already knew that the Edition X V.2 phones were very good, and expected them to sound fine. What I wasn’t so sure about was whether or not 0.2 Watts could drive them adequately. I needn’t have worried. Heifetz’ Stradivarius was a sweet as a mother’s kiss and as smooth as a baby’s bottom. The phones played uncomfortably loud with the volume control at the midpoint. They would have played much louder, I had no doubt. I then switched to a pair of HiFiMan HE-560s. These phones have an efficiency of just 90 dB and I was interested in how the “LO” output phone jack would drive these. As long as I didn’t ask for more than an average amount of volume, setting the volume control to maximum could elicit a fair amount loudness, but when plugged into the “HI” output jack, the Hifi-Man phones would play as loud as anybody could possibly want. I then tried a pair of Sennheiser HD-800. With an impedance of 300 Ω, the Sennheisers are a somewhat difficult load as the power of the Z10e is rated 2 Watts at 50 Ω and ostensibly much less at 300Ω. But the LTA drove these excellent headphones as loudly as anyone could sanely wish. Sennheiser does not specify the HD-800’s efficiency, but the high impedance absolutely dictates that the “HI” output jack be used with them. Electrostatic Headphone Performance The raison d’etre for the LTA Z10e amplifier is primarily it’s ability to drive Stax Pro-bias spec’d electrostatic phones. I had at my disposal, a number of electrostatic headphones to try with this amplifier: my own HiFiMan Jade 2, Mr. Speakers (now called Dan Clark brand) “Voce”, and the Stax SR-009s. One of the things I noticed is how different electrostatic phones can sound from one another. I understand why different magnetic phones sound different, they use a myriad of different technologies to achieve their sound as do magnetic speakers speakers. But I would think that since electrostatic phones all use the same basic driver design that they would all sound pretty similar, especially when driven by the same amplifier. All electrostatic phones consist of a micron-thin Mylar (or other plastic film) diaphragm all of which are sputtered with a molecule-thick coating of a conductive material, usually gold; and are stretched between two acoustically transparent stator screens where the audio is applied with a roughly 580 volt DC bias applied to the diaphragm. The housing cup for the diaphragm is large enough to surround the ear with a pad between the diaphragm and the wearer’s head and an open back with a protective screen over it to protect the transducer (and the user) from prying fingers (after all 580 DC volts is nothing to take for granted!). Boy was I wrong! All three of the headphones on hand sounded as different from one another as any other transducer. While I was surprised by the wide range of differences between each of these headphones, these differences did allow me to get a very good idea of the sound of the Z10e, especially when contrasted with the same phones through my Jade 2 amplifier. The Z10e, though a tube amplifier is just as quiet on all the ‘phones as is my FET Jade 2 amp. I noticed no noise at any kind through either amp even when the volume is set at what would be an uncomfortably high level if any music were being played at the time, which there wasn’t (when conducting high level headphones tests, I always stuff my ear canals with in-ear hearing protection – just in case). The things that I noticed that the Z10e imparted to all the phones is an expanded sense of space. Some headphones give a presentation that is more or less in-your-face (like the Stax SR-009s), while others present a more distant perspective. In all cases, the LTA presented a wide sound field that removed the music from inside one’s head (a classic headphone peccadillo) and spread it in front of the listener to a realistic width. I found this quite refreshing. The same headphones, on the Jade 2 “box” gave a presentation that was much narrower, and more of that feeling that the ensemble to which one is listening is mostly in one’s head; between the ears, with only a small portion of the music stretching beyond the ears into space. I have long since gotten used to that characteristic in headphones so, it doesn’t really bother me that much, but it was a bit of a revelation to hear another perspective from ‘phones with which I am otherwise familiar. One expects that tubes would not have as tight of a control of the bass region of any transducer as does a solid state amplifier. All the ‘phones used in this review have bass response advertised to reach below 10 Hz (but none give limits in dBs). I remember reading something the late, great J. Gordon Holt wrote many years ago. He said that frequency response figures are meaningless without quoted limits. He went on to say that the tiny speaker from a six-transistor portable radio could be said to have a response of from DC to well above 20 KHz, but whether or not the speaker produced any sound at those speaker extremes was another matter and a tiny speaker such as those found in portable radios did not produce any sound below a couple of hundred Hertz! It’s a matter of being able to move a volume of air large enough to produce sound. In a headphone, the amount of air that needs to be moved is confined to the volume of the ear enclosing cup that is ostensibly sealed by the ear pads around one’s ear so that just the volume inside the ear cup and one’s ear canal has to be moved. Here, small transducers can produce satisfying amounts of low frequency material. The Z10e produces oodles of clean, well controlled bass with no carryover and no boominess. I did a sweep of the amp with my audio oscillator app on my cell phone from 100 Hz to 20 Hz and while the audible bass fell off quickly below 35 Hz, on all the phones, my Hewlett Packard audio voltmeter, plugged into one of the ¼ inch headphone jacks showed that the amplifier was dead flat to 20 Hz! One thing about bass frequencies. They need a lot of room to propagate properly. For instance, a 20 Hz waveform requires 56 feet for one cycle from wave-crest to wave-crest! That means that even in the largest listening room, in spite of what one might have for speakers, or what the manufacturer claims for a speaker’s lower frequency limit, a 20 Hz waveform simply doesn’t have the room to form. Don’t believe it? Go to a cathedral, large church or concert hall that has a good pipe organ and listen to it. No matter how good your speakers are, you will never hear bass like that in your home and ditto with headphones – regardless of type or cost! Moving up the frequency spectrum, the midrange of the Z10e is simply gorgeous. Here, the Stax SR-009s excels. With the LTA amp, the mids are liquid, smooth and articulate. In comparison, with the same phones the Jade 2 amp is slightly recessed, a bit more delineated, and somewhat rougher. With the Z10e, Julie Andrews’ voice is so real on the Columbia/Sony recording of the original cast recording of “Camelot” that it often sounds like she’s standing right next to you. This is most apparent with the Stax ‘phones, but is there to a lesser degree with the Jade 2 ‘phones, and not at all as realistic on the Voces. Moving up to the treble region, great highs and fast high frequency transient response are the metier of electrostatic headphones. And here, all three phones were in their element and the Z10e delivered the goods. Many people believe that today’s planar magnetic phones now equal electrostatics in this area, but I have yet to hear it. I have a pair of HiFiMan Edition X V.2s and a pair of Anandas. And while they are very good, neither provide the extension or the “air” that a good pair of electrostatics can provide in the treble region. I have also recently had the pleasure of auditioning a pair of new Abyss AB-1266 isodynamic phones powered by Headamp’s GSX Mark II amplifier in balanced mode. These very expensive headphones sound great, but they lack the detail, cleanliness and effortless extension afforded by the Z10e when paired with the Stax SR-009s! This amp is so good in the highs, that I found myself listening to tracks with lots of percussion just to hear the realism of brushed cymbals, the staccato slam of hard sticks on drums, the attack of a xylophone or marimba, and the thump of bongos. The Z10e is very impressive, and while the Jade 2 amp is also very good at this, there is something extra about the presentation of the LTA amp that all others seem to miss. Conclusion The LTA Z10e is simply a remarkable component. It is sold primarily as a headphone amplifier for electrostatic phones, but is, in reality, so much more. If I were to offer any criticism at all, it would be that an amplifier advertised as being an electrostatic headphone amp, should have two electrostatic headphone ports and not just one. Most of this amp’s competition in this area from companies like Woo, Stax, HiFiMan, and Headamp. The Z10e can power all types of magnetic phones from a vintage pair of Koss Pro-4A all the way to a stratospheric priced pair of Abyss AB-1266 as well as phones designed for portable audio devices such as iPhones and iPods and equivalents. It also will drive a pair of efficient speakers with 12 Watts of output transformer-less power; play them loud and sound great doing it. If one chooses one’s speakers carefully, there is no reason why the LTA Z10e can’t form the heart of a state-of-the-art stereo system. With its two line-level single-ended inputs and it’s single pair of balanced inputs the Z10e is a complete integrated amplifier. The included Apple remote control allows one to select inputs, raise, lower the volume and change the left-to-right balance. While, $6950 seems like a lot of money to spend on a fairly low power amplifier, there are certainly others which cost more, but few, if any have the versatility and sound quality afforded by this amplifier. Whether you use the LTA as the center of a fine stereo system, or just as an electrostatic headphone amplifier, There are few that can equal it in sheer performance. Impressive. Product Information: Linear Tube Audio (LTA) Z10e Electrostatic Headphone Amp / Integrated Amp ($6,950) LTA Z10e Product Page LTA Z10e User Guide / Manual (372KB PDF) LTA Amp FAQs
  3. Electrostatic headphones have been with us for a long time. The Japanese company Stax (not to be confused with the record label) started making stereophonic ES 'phones with the introduction of the SR-1 in 1960 and by the late sixties, Koss was making their flagship model, the ESP-9. I had a pair of these puppies and found them wanting. While Stax was selling a system consisting of a a pair of phones and a combination tube amplifier and a polarizing power supply designed to be fed audio from a line-level input, the Koss ESP-9s had only the power supply. The audio was supplied by one's power amplifier. One connected said amplifier to the Koss box and then connected one's stereo speakers to that box as well. To listen to phones, one interrupted one's feed to the speakers with a switch on the front of the Koss box. Not a great way to power headphones, especially if one was using heavy speaker cables. They would pull the light Koss energizer right off the table. The ESP-9s sounded OK (and I wonder if I would still find that to be the case?) but they were heavy, bulky and with their oil-filled soft vinyl ear cups and closed backs, they would be uncomfortably warm to wear after a while. Meanwhile Stax was making relatively light and comfortable open back ES 'phones, but they were pretty expensive (and still are). Today, Koss makes more headphone models than anyone, including the ESP-950, which is a light, open-backed and comfortable looking electrostatic headphone system. I've never seen a pair in the flesh, but they have good reviews and they are certainly less expensive than most of the competition at $999. I have never been a great fan of headphone listening, preferring instead to do my listening with loudspeakers. Though I've always had several pairs around, I generally used them only when I needed to not disturb others or when mixing a recording. I still have a pair of Koss Pro-4A's for location recording because they are closed-back and have great ear sealing capability. They really attenuate the outside noise and let me concentrate on what's coming in through the microphones. Today, however, headphone listening has become a major mode of listening to music for several generations of music lovers. Spurred, I believe by the fact that most younger listeners get all their music from iPod-like players, pads and smart phones, the industry has seen an explosion of new and old companies producing headphones operating on a number of different principles from the traditional small speaker cone in each earcup to the isodynamic or planar magnetic principle to electrostatics. For many years in the 80's, 90's and two-thousands, if one wanted electrostatic headphones, one pretty much needed to go to Stax or to Koss as they were the only game in town. Today, there are so many electrostatic headphones being made that it's hard to keep track of them. Many new companies have started building this type of 'phone at almost all price points from the low end characterized by Voza and Cybersound with their electret designs (starting around $170), to the Warwick Acoustics Sonoma ES headphone system at at $4995 all the way up to the HiFiMan's $50,000 “Shangra-La” headphone system. HiFiMan's Jade II Electrostatic Headphone System We are interested today in a new moderately priced full electrostatic headphone system from HiFiMan called the Jade II. HiFiMan's first product was, in fact, a short-lived ES design called the Jade, but Dr. Fang Bian soon decided to concentrate his efforts on planar magnetic or “isodynamic” designs instead and the original Jades fell by the wayside. About two years ago, the company surprised the industry by introducing a state-of-the-art, cost is no object electrostatic headphone system dubbed the “Shangri-La”. This system came with a huge combination polarizing power supply and tube-based amplifier. The amplifier uses four “Western Electric” 300B tubes (two per channel) and four smaller driver tubes (6SN7s). The 300Bs are directly heated (no separate heater, the filament is the cathode) triodes which were developed in the late 1920's for long-distance telephone amplification and are still prized today by SET fans for their incredibly pure sound. HiFiMan says that there is nothing between the 300Bs and the headphones, no transformers and no capacitors, and thus one hears to pure sound of the these remarkable (and expensive) tubes. Later, and for considerably less ($8000), the company released the “Shangri-La” Jr. Also tube-based, this amplifier used four matched 6SN7s to power the headphones. Now the company has released the very affordable ($2499 US) Jade II electrostatic 'phone system. These phones are all solid state with FETs driving the audio to the 'phones. First Look The Jade II's arrived at my door (from China) in a very large outer box and two smaller inner-boxes. One box contained the headphone set and the other the amplifier/energizer unit. The headset is the by-now familiar HiFiMan roughly anatomical ear shape and has the newer, simpler headband configuration. I.E., the earcups do not swivel right to left as in earlier HiFiMan designs, only back and forth. The first thing one notices about the headphone set is how light it is when compared to HiFiMan's premium planar-magnetic offerings. At less than 13 ounces (365 grams), the Jade II's are among the lightest full-sized 'phones this reviewer has ever tried. This lightness leads to a wearer comfort that allows for multi-hour listening sessions without neck muscles getting stiff! This is a real advantage and when coupled with very comfortable ear pads comprised of a breathable material, it means no ear sweating when listening over a long term as well. The six-foot cord is terminated with the industry-standard five pin plug, which means that if one already has a pair of Stax headphones one can use Jade II's as an extra pair of 'phones with that system's energizer/amplifier. One can also use the headset with the Woo Electrostatic headphone energizer/amplifiers and energizers as well as the iFI “Pro iESL” energizer. For this reason HiFiMan sells the Jade II headset separately, for $1399. While the Jade II's headset is light, the amplifier/energizer is not. At 14.3 lbs or 6.5 KG, it consists of a black anodized, CNC machined outer surround and an oval inner case nestled inside. The overall measurements are 10.9” X 10.6” X 4.6” (276mm X 270mm X116mm). The amp has two standard electrostatic headphone connectors on the front along with a push-button on-off switch, a push switch to select between balanced and non-balanced inputs and a stepped volume control which controls both pairs of headphone jacks simultaneously. There is no provision for balance between right and left nor are the two output jacks individually adjustable for volume. On the back is an IEC power cable connector and a pair of XLR balanced inputs flanked by a pair of gold-plated unbalanced RCA jacks. Connecting The Jade II's to My Audio System As mentioned, the Jade II energizer/amplifier can be connected to one's system by either unbalanced RCAs or via balanced XLRs. Since I have XLR outputs on my DAC (a Schiit Yggdrasil) and there is a definite advantage to having the headphone's controls next to my listening chair (on the other side of the room from the equipment shelves) I decided to use XLRs to connect my system to the Jade II. I have lots of XLR mike cables of different lengths and most are color-coded right and left with red and white tape wrapped around the connector barrels on both ends, so I decided to “borrow” a pair from my recording stash that was long enough to stretch from my DAC around the periphery of my listening room to a table beside my listening chair. All of my digital sources, ranging from the audio stream served from my computer in my office, to Internet radio from my Logitech Squeezebox Touch to CDs and SACDs and audio Blu-Rays played on my Oppo UDP-205 “media center” as well as DAT tapes played on my Otari DAT recorder lead to the Yiggy. This is done to get the most consistent digital sound from all sources. Thus connected, I could play everything (save LPs) into the Jade II amplifier and control the volume from where I sit. The only problem with this scheme is that the Yiggy does not have a remote control (and believe me it needs one!), but I solved that problem with a broomstick! I found that a broomstick would just reach the Yiggy's source selector button if I leaned forward in my listening chair, so I went to the home depot and bought a length of wooden dowel to use to select which digital input I wanted! I keep it next to my chair at all times. Listening to the Jade II's Anyone buying a pair of Jade II's should not expect great sound when you put them on for the first time. Fresh out of the box, the 'phones sound very restricted in dynamic contrasts as well as presenting a fairly narrow soundstage. These phones definitely need about 100 hours of “breaking-in” before sounding their best. The reason for this is that the sound producing element is an extremely thin diaphragm of some proprietary plastic material that is stretched very tightly over the supporting frame between the two perforated stator plates. This diaphragm must stretch a bit to loosen it enough to have the travel necessary to give the best sound. My advice is to turn on a digital radio station and pack the headset in pillows so you don't have to listen to the 'phones as they break-in over four or five days of constant playing. Just let them play for about a week before doing any serious evaluation of their sound. Bass performance With the Jade II's fully settled-in, the first thing I noticed was the absolute lack of distortion of any kind. Most of us are so used to the types of distortion produced by most transducers, that we don't even think about it. We don't really notice it at all... until it's not there anymore! This is especially true of low frequency distortion, which most of us just take for granted because it is present in greater or lesser extents in virtually all cone based woofers. The Jade II's follow in the general HiFiMan tradition of having great bass extension. HiFiMan's published specs for the Jade II's is that they go down to 7 Hz (although this is without the limits being defined). Irrespective of how many dB down these 'phones are at 7 Hz, in the low 20 Hz region the bass is prodigious for a pair of headphones. More than just the quantity of bass present, the Jade II's have exceptionally clean bass. Listening to Saint-Saens Symphony #3 in C minor, OP78, the “Organ” symphony with Micheal Stern and the Kansas City Symphony (Reference Recordings RR-136), I was struck with not only the power and depth, but the clean delineation of the full C Major chord when the organ sounds-in in the second movement. I know this work well, yet I was still startled by the pedal chord when it started. Even with good subwoofers, capable of shaking the house foundations, I have never heard the organ work in this composition with such authority and cleanliness of presentation. Most headphones tend to double at these frequencies, especially if the low frequency notes are very loud. The Jade II's do not double and maintain a linear pistonic action to the very bottom of whatever is recorded. Transient Response Transient attacks are what one should expect from a small electrostatic transducer, but rarely hears. I have a recording that I made with a Zoom H6 hand-held recorder using MS microphone module that comes with the recorder. The recording was 24-bit/96 KHz and was made at a local night club. It consisted of solo “flamenco” guitar and an elaborate percussion ensemble. Through my hybrid electrostatic speakers and through my numerous pairs of dynamic headphones, the rim shots on the snare drum are, indeed, impressive, but through the Jade II's they are nothing less than electrifying! The attack is startling and the rim shot stops as quickly as it starts. I have listened to this recording countless times through my HiFiMan “Edition -X, v.2” planar magnetic phones and they didn't have the realistic spped or impact of the Jade II's. I put this down to the ultra thin (less than one micron) diaphragm that HiFiMan employs. This all but massless membrane is able to accelerate and stop much faster than would phones employing more conventional diaphragm materials such as thin Mylar. The Edition X's, I believe, are slowed down by the need to have a current-carrying “voice grid” applied to the diaphragm. So, irrespective of how thin the diaphragm material, there is going to always be the added mass of the voice grid. Electrostatic phones' diaphragms, which have a molecule-thick conductive coating “vacuum sputtered” evenly over their entire surface, don't need this extra mass and thus can accelerate and stop much faster. Midrange and High Frequency Performance As good as the Jade II's are at the bottom of the audio spectrum, and as good as they are in the transient response department, the 'phones present a basically uncolored midrange as well. Brass instruments sound just right and have the bite one associates with the real thing; something that is rarely present with the best loudspeakers, much less headphones. Also, I have never heard cleaner highs. The advertised Jade II high frequency extension,which is said to reach out to 90 KHz (!) is hardly relevant to the reproduction of music, but it does speak for a smooth and extended treble region, free of the peakiness often encountered with dynamic phones as they reach their high-frequency resonant point. Obviously a headphone system that has response out to 90 KHz is going to have a diaphragm resonance that is way above the audible band pass. Soundstage and Imaging Finally, I'd like to comment on soundstage. This may seem like a strange thing to discuss when evaluating headphones because we've all come to expect any imaging produced by a pair of headphones to be inside of our heads. I expected no more or no less when I first donned this pair of Jade II's and to be honest, I was not disappointed. The soundstage was indeed in my head just as I expected. But, after giving them a hundred hours of break-in, I was flabbergasted to find that these phones actually image in a much more speaker-like manner than any headphone set that I had ever experienced before! For the first time the image was outside of my head and in front of me. I realize that it's an illusion, but it is a very satisfying one! If one keeps one's head relatively still, the soundstage that one hears is stable with great image specificity and a wide deep presentation. You'll not be fooled into thinking that you are listening to stereo speakers, But it will be such a breath of fresh air after living with ordinary headphones, that you won't really care. Practical Considerations At $2499 (US) there is no doubt that the HiFiMan Jade II electrostatic headphone system is a bargain. The nearest quality electrostatic competitor is the Stax combination of the SR-007A MKII at a bit over $1800 (from Amazon) and the matching Stax SRM-007TA SRM-007TII driver unit/headphone amplifier at slightly more than $1400 (again from Amazon and imported by them directly from Japan as are the headphones) for a grand total of around $3200. Even though this price isn't bad, considering that planar-magnetic units from HiFiMan, Audeze, and others can cost far more than that, Still, the Jade II's modest price is very tempting, especially in light of their stellar performance. Since the Jade II's use the same headset connector as do Stax headphones, if one needs an extension cord, one can purchase the 6 Ft extension for Stax phones, but be advised that such an extension is over a hundred dollars from Amazon. XLR terminated microphone cable is much cheaper and allows one to place one's Jade II system next to one's listening position, obviating the need for an expensive headphone extension. Conclusions With the introduction of the Jade II electrostatic headphone system from HiFiMan, the performance bar for high quality electrostatic headphones has been raised and simultaneously, the price bar has been lowered. One can spend much more that the $2499 for a pair of magnetic phones that sound nowhere near as good as the Jade II's. Keeping in mind that they won't sound their best until until they have about 100 hours under their belt, one simply cannot go wrong making the HiFiMan Jade II headphones one's next high-end expenditure. Product Information: Jade II Electrostatic Headphone and Amplifier ($2,499) Jade II Electrostatic Headphone only ($1,399) Electrostatic Headphone Amplifier only ($1,599) Jade II Product Page Where To Buy: HIFIMAN Direct Customer Service Number: +1(201) 443-4626
  4. When most Audiophiles see or hear the word “Stax” they conjure up in their minds lots and lots of dollar, euro, or pound sterling signs floating before their eyes. And not without good reason. A pair of the Stax “flagship” model headphones, the SR-900S is $4,500 (all prices given are US dollars) and the SRT-700T (for tube) or SRT-700S (for solid state) energizer/amp is $3,500. That makes electrostatic headphone listening a pretty expensive proposition to most of us working stiffs. At one time (and not so long ago at that) $8,000 was a lot of money to spend to listen to headphones. Today, the landscape has changed somewhat in that one can spend upward of $11,000 for a pair of Abyss AB-1266 Phi TC Reference ‘phones which comes with a fancy cable that doubles the base price of 1266 alone! Well, while it appears possible to spend the price of a small car (in some countries) on a pair of headphones, it is possible to get a fantastic sounding pair of Stax “Earspeakers” (that’s what Stax prefers to call its headphones) at a more than reasonable price and that is the subject of this review. Stax, The Company The Stax company was founded in 1938, but the first “Earspeakers” didn’t arrive on the scene until 1959. What they made before 1959, is kind of hazy, but in the last 50 years or so, through a myriad of foreign distributors and an ever changing dealer network, Stax has sold, at one time or another, a range of electrostatic speakers of all sizes, power amplifiers, DACs, and even a CD player or two. But they are mostly known for their headphones and right now, their catalog of products available in the USA is relatively small, compared to what they are actually making. The SR-L300 and the Energizer/Amplifier The SRL-300 phones list for $430.00. I’ll let that sink-in. Four hundred and thirty dollars. In today’s headphone market, that’s not just inexpensive, it’s downright CHEAP! Of course, that’s not the only cost one will incur, electrostatic headphones require an amp/power supply. Right now, the cheapest one that Stax offers is the $899 SRM-D10, which is a portable, battery-powered DAC/energizer/amplifier for one pair of Stax “Pro Bias” phones (all current Stax phones are Pro Bias meaning that they require a polarizing voltage of 580 volts DC). The combination of the two will push the cost of electrostatic headphone listening to just over $1300. Now, one way to look at it is that a pair of HiFiMan Jade 2 electrostatic/phones/amp are $2500. So the SR-L300/SRM-D10 is $1100 cheaper. More versatile Stax units (sporting XLRs for instance) are over three grand and it seems somewhat incongruous to spend $3500 for a headphone amp to drive a four hundred dollar pair of headphones. Luckily, today, there are quite a few other solutions for an energizer for Stax pro-bias ‘phones, Such as the Jade2 amp from HiFiMan at $1300, or the iFi Pro iesl for $1,500. Right now, the cheapest solution for the SR-L300s is the Woo WEE electrostatic headphone energizer. This unit retails for $599 and must be places in-line with a power amplifier and a pair of speakers. When you switch the WEE on, it cuts the speakers out. Although this energizer was designed with the SR-L (the L stands for “Lambda” Series of Stax phones) in mind, it is not recommended for he SR-700 or SR-900 series of Stax phones. My advice is to look on Amazon (if you don’t already own a suitable energizer/amp) for the Stax SRS-3100 system. This combination of the SR-L300 ‘phones and the SRM-252S energizer/amp is around $800. It will have to come from Japan because Stax USA doesn’t import it, but The Amazon partner company “AmazingJapan” has been doing this forever, and they they offer free delivery. Be advised that it will take between 2-weeks to a month to get them, but anyone who has bought something from China will be used to that. Still, it’s the best and cheapest way to get into a budget, quality pair of Stax Earspeakers. SR-L300 Components and Build Quality OK, a pair of electrostatic ‘phones selling for under $500 must have some compromises, right? Well, of course, and the SR-L300 is no exception. The frame, the ear-cup yoke, and the headband are all made of plastic in this model. But it’s not cheap plastic, and if handled with reasonable care, there’s no reason why these phones shouldn’t last as long as any other headphone set. The other concession to price is the ear-pads. I don’t know what the pads are made of, they look like leather, but are probably a man-made material and they are thin. For me this is not a problem. My ears lay pretty close to my head, but if yours are more like Clark Gable’s ears, the pads might not be adequate to keep your ear pinnae from touching the inside surface of the ‘phone. Fear not, though. Contrary to what some other reviewers have said about electrostatic headphones in general, there is no way for the 580 volt bias voltage to shock you. The parts of the transducer (the stators) that are open to the elements and could possibly be touched by the wearer carry only the low voltage audio signal. The high-voltage, low-current bias voltage is applied only to the diaphragm and is encased between the stators. Even if the diaphragm were to touch one of the stators, the charge would be carried away by that stator causing no more than a large “snap” to be heard. Now, Stax’s next most expensive ‘phone is the SR-L500 Mk2. According to other sources, the only difference between the $792 SR-L500 and the $430 SR-L300 is that the 500 has a metal yoke and headband and the ear pads are somewhat thicker. The actual ES unit itself is identical between the two. The SR-L300 has a fixed cord which cannot be removed while the SR-L500 Mk2 has a detachable cord. Both have the “blue” striped cable indicating the same 2.5 meter low-capacitance Oxygen-Free Copper (OFC) conductors. By all accounts, the two sound identical. If the “cost conscious” build quality of the SR-L300s bothers you, by all means spend the extra $362 for the 500s. ...And What About That Sound? These headphones are incredible. In fact they are jaw-dropping good! The frequency response goes from 7 Hz on the low end to a high of 41kHz on the top. What I ind interesting about headphones is how different makes and models differ in the perspective they give. For instance, the HiFiMan Jade 2 electrostatic ‘phones give a somewhat distant perspective, say 5th row center of the concert hall, while the Stax SR-900s put the listener first row, center and the SR-L300 put the listener up on stage with the performers. Now all of my listening with these phones was done with either the new Stax SRM-700T (for Tube) or the HiFiMan Jade 2 energizer/amplifier (solid-state). I’m very fond of my Jade2 system. It is clean, articulate and the phones are super comfortable. But in spite of the Stax being over a thousand dollars (List price) cheaper than the Jade2s (by themselves – no energizer/amp) they blow the HiFiMan cans out of the water. The amount of detail retrieval is an order of magnitude better, and the in-your-face perspective of the Stax still manage to give a soundstage that is at once wider and deeper. While this difference is much more pronounced with the Stax amp, both amps allow two sets of phones to be auditioned at once. This makes comparisons between different sets of phones much easier because one can switch very quickly and one can tell which amp does what to which phone (confused yet?). For instance, Between the SR-900S ($4500) and the SR-L300 ($430) on the Stax amp, one can easily hear that while the former are about 10X the latter, the sound of the two (except the difference in perspective, of course) are actually fairly close. There is certainly not 10X the difference in performance, and given the lightness of the SR-L300s, they certainly are more comfortable than the flagship model over long-term listening. If I were to put numbers to the difference between these two Earspeakers, I’d say that the SR-900S is twice as good as the cheaper phones. Mainly the difference is in smoothness of the frequency response. The SR-L300s have a broad peak in the presence region. Not enough, mind you to make the ‘phones sound like something’s amiss, but enough to give what I think is responsible for the “in-your-face” perspective. Far from detracting from the SR-L300’s performance, this up close and personal aspect to the ‘phones makes music more exciting to listen to. Vocals are more intimate, and I mean both female and male vocals. On the Sinatra compilation album “Greatest Love Songs” from the Capitol years (WEA), Frank’s voice and breath control is very apparent on his rendition of Cole Porter’s ‘In the Still of the night’. The intimacy that these phones instill into the performance is breathtaking. Likewise on Billie Holiday’s rendition of ‘A Fine Romance’ on the Waxtime label’s (PolyGram) “Music for Torching” the extra soupcon of intimacy is very welcome. Frequency response wise, in the opening bar (Sunrise or Introduction) of Richard Strauss’ ‘Also Sprach Zarathustra’ on Telarc from the Vienna Philharmonic with Andre Previn Conducting, The piece starts, as most everybody knows, with a sustained double low C on the double basses, contrabassoon and organ. With many headphones, this comes across sounding more like a piece of canvas fluffing in the breeze than the sustained low note that it’s meant to be. With the SR-L300s, it sounds like exactly what it’s meant to be. A sustained low note. While no headphone can produce low organ notes with wavelengths of 16 to 64 feet accurately, at least these Stax don’t double like many headphones do. They produce clean low frequency notes that at least sounds like music. On the top end, I use one of my favorite recordings; the superb Rozsa Violin Concerto performed by Jascha Heifetz, the violinist for whom the piece was composed. Heifetz is playing His famed 1714 Stradivarius named the “Dolphin” in this piece with the Dallas Symphony for RCA Victor. Heifetz preferred unvarnished gut strings for his Strad, with a silver wound gut G string. These produce a particularly sweet top end on the instrument and I find the recording (although more than 60 year old) to show of the treble response of any transducer whether headphones or speakers. Here the SR-L300s shine. There is a shimmer to the high notes that I find missing in almost all dynamic phones and in many electrostatics. It’s here in spades in all the Stax phones I’ve ever played it on. This not only shows the high frequency extension of the phones to best advantage, but is demonstrates the lack of even-order harmonic distortion in general that is a characteristic of the push-pull nature of electrostatics, but especially of the long tradition of building this kind of transducer in general enjoyed by Stax. Conclusion I was interested in these phones as a second pair that I could hand to visitors so that we could listen together; me on my Jade2s, and my guests on the “inexpensive” Stax. After listening to them for more than a month, I’ve changed my mind. When you come to my house for an audiophile visit, I’ll hand you the HiFiMan Jade2 headphones and I’ll keep the Stax SR-L300s for myself. They are now my go-to pair of electrostatic headphones. They’re that good! Product Info: Product: SR-L300 Earspeakers Price: $430 Product Page - LINK Brochure - LINK (PDF)
  5. At Chris’s request, I’ve consolidated my contemporaneous postings about RMAF into this show report. This is my second year attending RMAF at this venue, and like last year, it was very enjoyable. With the benefit of past experience, I was able to organize my time better, so got to see more of the rooms and exhibits than I did last year. Before I get any further, a word about what this report is, and what it isn’t. It IS a highly personal chronicle of my experience at RMAF. It ISN’T a preplanned show report, as the idea of publishing this on the CA front page came after the show was over. I make no claims of full coverage, as I planned some of my meanderings based on things I wanted to see. I could not visit some rooms, often because the room was too full or “a reviewer is in there.” I am only going to mention rooms and systems that caught my ear or fancy. General Thoughts RMAF isn’t really a show with much direct intersection with computer audio. Occasionally, a few relevant vendors will show and/or announce new products, but for the most part, attending RMAF is about experiencing mainstream audiophile systems. Also, it is a tough job to show a stunning system in a hotel room. In my experience - both last year and this time - I'd say less than 10% of rooms sounded even remotely good. However, I do feel this year was a little better. Of course, this is moot, as next year the show moves to a brand new venue, so we shall see if the ratio of good to bad changes. It’s all about people, people! Although the rest of this report will focus on my favorite sounds, the best part of the show is about meeting old audio friends and making new ones. Like last year, @limniscate (Eric) was my show buddy, and we visited most of the rooms together. Meeting CA’ers in person for the first time was certainly one of the highlights. Shouts out to @ted_b, @barrows, @The Computer Audiophile, @Rt66indierock, @Derek Hughes, and last but not least, @David.. Qobuz, Hi-Res Music Evangelist, with whom we had a memorable happy hour. I apologize if I missed any other CA’ers I met but forgot to list. Eric and I also hung out with Jay and Siao from Audio Bacon - great guys. Beyond that, there were spontaneous conversations with everyone from industry icons to fellow audiophiles throughout the show. Making and renewing friendships is truly the best part of these shows. Computer Audio Products While RMAF isn’t really focused on computer audio, one product did stand out: the new Innuos Statement Music Server (MSRP $13,750). It was showed in a system comprising QLN Prestige Three speakers ($9,999), LinenberG amplification, Aqua Formula xHD DAC. They had their previous flagship ZENith MkII SE (MSRP $7000) hooked up for A/B comparisons with the Statement. While the Statement is a massive uptick in price, you do get a separate PSU with 8 rails, OCXO clocks for USB and Ethernet, among many other improvements. The A/B experiment did a good job showcasing the SQ improvement with the Statement. Photo Credit: Well Pleased Audio Vida My favorite headphones of Canjam RMAF: Meze’s new Empyrean headphones ($3000) had a captivatingly smooth, dynamic, and spacious sound. I will definitely be giving this a closer look. Warwick Sonoma Electrostatics ($5000 with DAC/amp) were my favorite electrostatics after the iconic Stax SR009. Photo Credit: Abyss Headphones I enjoyed the new Abyss Diana Phi. When I first tried these a couple years ago, I found they had the clamping pressure of a vise on my admittedly large head. No more. This is one of many improvements in the Phi version. Photo Credit: Abyss Headphones One of my favorite headphones of the show was the Abyss AB-1266 Phi CC. Like its predecessors, the sheer slam and physicality of this bad boy, coupled with its neutrality and dynamics, make this a real flagship. These Quad ERA-1 planar magnetic headphones sounded very clean and smooth - reminiscent of Quad electrostatic speakers! - at the Woo Audio table at CanJam, driven by their diminutive but impressive solid-state WA11 Passport DAC/amp. Especially next to the just-released Focal Elegia closed-backs, which I found distinctly underwhelming. These Quad's may just set the new benchmark for the sub-$1k segment. Best sounding Rooms - Cost no Object I had loved the Nagra room last year, and this year again, it was one of my favorites. This year featured Nagra HD electronics, Nagra reel-to-reel deck, and Rockport Cygnus ($62,500). As you’ll read, Rockports seemed to find their way into several great systems at RMAF! Raidho’s room had these lovely TD-4.8 ($158-177k), driven by top-end Simaudio Moon electronics. The Vandersteen Model Seven MkII's ($62,000) with Sub 9 subwoofers ($18,000) and Granite upgrade ($10,000) sounded mighty fine, couple with VTL electronics. Constellation electronics driving Rockport Avior II ($38,500) speakers was another standout room. These $200k Von Schweikert Ultra 9s, powered by other expensive electronics, did one thing that too many other 6-figure speaker systems didn't do at RMAF - sound amazing. I visited twice, and was underwhelmed the first time they were playing Beethoven's 9th on a turntable. The second time was digital, and that was outstanding. These Wilson Benesch Resolution ($69,500) speakers really stood out with their pinpoint imaging. I was able to play some Mahler 10th from my own music, and it was an excellent system and sound. Another great-sounding room with Rockport Avior II speakers, this time with CH Precision electronics. Great Sound with Speakers under $20k It is easy to lose one’s sense of perspective and proportion at these shows. The prices on the best systems are, well, obscene. $100k+ speakers are commonplace, with preamps, amps each north of $50k. Heck, the aforementioned Nagra system had a DAC north of $50k. What madness! In order to showcase systems that were not insanely priced, I’ve placed more sanely priced speakers in this section. I focused on speakers, because some systems used really expensive electronics even with sub-$20k speakers - I guess because they could. Excellent sound from Canton Reference 3k speakers (MSRP $15,600), driven by electronics that were um, Esoteric-ally priced. Photo Credit: Legacy Audio Legacy Focus SE speakers (MSRP $13,975), driven by Raven electronics, impressed me with their fantastic imaging. Joseph Audio Perspective (MSRP $12,999) speakers on Doshi electronics. Another sanely priced speaker that sounded really nice. Good ol' Vinnie (Rossi). He sets up his rooms so well. And this year was no exception. LIO L2 electronics driving these Harbeth M40.2 Anniversary Editions (US MSRP $17,990) was really rocking. Room acoustics weren’t perfect, and I've heard this setup sound better at another show, but even so, the soundstage at the sweet spot was incredible. Speakers under $10k Raidho’s room alternated demos between the top end TD-4.8 mentioned earlier, and these Scansonic MB-5 (MSRP $7500) speakers. These sounded stunning at this price point! Just to highlight how show conditions matter - these GoldenEar Triton References (MSRP $8498) were sounding rather nice here, paired with Hegel electronics, unlike what I heard at AXPONA where I didn't like them. These Dali Callisto active speakers sound wonderful for the $5700 price point. I'm a sucker for the BBC LS 3/5A design. These Falcon units ($2195) sounded fantastic for their small size. This was one of my favorite rooms of the show! Falcon had a setup of 6 different generations of the BBC LS 3/5A, including a restored original BBC version, all the way to the latest version from Falcon. Listening to the same track switched between each generation was a real treat. I've got to say - these speakers are astounding, even to this day. And last but not least, my first exposure to the Wilson TuneTots (MSRP $9800). Very, very impressive sound. These would be killer for a nearfield setup - at a price! Other Interesting Rooms Here are some Spanish Maggies. Just kidding. These are AlsyVox full range ribbons and Omega electronics. Very nice. These German Physiks Borderland (MSRP $38,500) speakers sounded great. Only downside was it made my brain loop on "We are the robots" as long as I looked at them. Can we talk about the elephant in the room? Is that a giant horn or are you just happy to see me? These ESD Acoustic monsters were certainly worth a listen, if not my cup of tea. Plus listening to Chinese erhu music on these was a bit surreal.
  6. There seems to be no end in sight for the significant gains portable audio has seen in the past few years in terms of both sound quality and feature sets. The last big hurdle seems to tackle the elusive integration of tubes. A few desktop units from Woo Audio and others have trickled out into the market but a more portable solution hasn’t really gained significant steam in the public consciousness. Portland-based ALO has introduced several variations on this theme with their original Continental and subsequent Pan Am models, but has since halted production to focus on their new portable flagship called the Continental Dual Mono ($1,495). The feature set is a hefty one, and appears to be an impressive collection based on learnings and observations from the company’s time in the field. [PRBREAK][/PRBREAK] At first glance, the most obvious (and perhaps surprising) changes to the ins and outs is the inclusion of a 2.5mm balanced connection and the exclusion of the traditional 4-pin RSA port included previous generations. ALO’s amplifiers have always looked to complement the current lineup of portable players, so it may come as no surprise that the substitution has been initiated to correspond the current rise of Astell and Kern players. AK not only provides the source output, but also sells a two pairs of headphones for the receiving end of the chain; additional headphones may require an adapter. Other versatile niceties include a fixed 2Vrms analog output (3.5mm) for direct access to the included DAC section and both SE and balanced ins and outs on the front and back panels. The whole presentation is laid out extremely well and doesn’t skimp on the options. The previously mentioned DAC section can be tapped via a micro USB connection, charging capabilities are exclusive to the included 12.6V wall wart. ALO founder Ken Ball and his team pay careful attention to the current audiophile trends so it is no surprise that the CDM includes both DSD compatibility and an output impedance of less than 1 ohm on both the SE and the balanced headphone output. The front panel also includes 4 colored indicator lights to let you know what file resolution you are hearing as well as a 2-way gain switch for variable headphone output. As is the case with most amplifiers that feature both SE and balanced output, the balanced connection had more gain that its SE counterpart. As far as the SE headphone output is concerned, the total volume from the high gain stage might be a little light for loud listeners with extremely hard to drive headphones like the HiFiMAN HE-6. There was no issue driving my reference pair of Audeze LCD-3s or the HE-560s, but it was possible to drive the volume pot to its near maximum with quiet tracks (with the HE-560s). This gain appeared to be on par with the SE output from the AK240, but didn’t provide much additional muscle beyond that. This point is a small one, if even a null one when it comes to the overall appeal of the amplifier. Perhaps a subtle hint from the name, the intent of the Dual Mono seems very much wrapped up in the balanced connections and this becomes even more apparent in use. In broad strokes, the balanced connections are where the Continental really shines. In-ear monitors can be tricky to amplify in concert with full size headphones. They usually require separate amps to pull the best out of their corresponding partners. From the SE output the noise floor on low gain was relatively inaudible through sensitive IEMs (like the JH Audio Layla) and the volume sweep from low to high was extremely manageable. With the increased gain of the balanced output the 2.5mm connection of the Layla’s produced a very slight buzz. None of the amplifier’s outputs were plagued by any micro phonics or the dreaded “ting ting” sound (like a small pebble being throw against a glass jar) that can occasionally creep into tube amplification on this scale. The unit did warm up slightly during use, but kept surprisingly cool considering the encased tube design at play. There have been a few portable pieces that have entered the market that threw off incredibly high amounts of heat (most of which did not employed tubes) so considering the circumstances the outgoing temperature of the CDM seems very well done. Ken partnered with Vinnie Rossi of Vinnie Rossi Audio for the battery implementation and design. Power supply design is imperative to keeping amplification dynamic and clean, Vinnie elaborated on its application with the CDM: “The Continental uses a battery pack containing three of the Panasonic NCR18650 cells (same as used in the Tesla Model S) connected in series for a 11.1V nominal battery pack. These are known as the finest 18650 Li-ion cells on the market. The battery pack (and tubes) are user-changeable. What makes the CDM's implementation special is that we are not using a step-up transformers or DC-DC converters for the tube stages. We feed the clean power from the battery pack directly to the tubes' B+ (anode) and achieve remarkably low noise floor and microphonics for a tube-based amplifier. As far as I know, CDM is the only portable tube amp/dac that is all linear-voltage regulated. Therefore, we were able to meet our goals of getting a good taste of ALO's reference amplifier The Studio Six, in a portable package and at a much lower price point.” While some audio items don’t vary much with playback exposure, the CDM sample I received did change slightly with a burn in period. The mids opened up and leveled out and the overall presentation picked up quite a bit from the initial plug in after a few days of use. Once a balanced playing field was achieved, it became easy to visualize suitable applications for the new flagship. Partnering with an AK device became an interesting proposal. The AK240 ($2,499) isn’t the cheapest player on the market, but it comes packed with a real pretty sound. Through the player’s 2.5mm balanced output via ALO’s SXC 24 cable, the Dual Mono added just a hint of tube to the mix. The stock tubes that come with the amp are a pair of new, old stock Phillips military 6111s. The resulting sound is delightfully linear and refined from this glass. The mids round out just a hair and the bass stays tight and doesn’t get even slightly mushy. It’s a very interesting and appealing approach for those who are adverse to intense tuby-ness. For those who love an even fatter sound, tube rolling is an option. Ken has experimented quite a bit with different combinations and a significant range of alternatives is available directly from ALO’s site. According to Ken, the stock tubes lean on the light side of “Tube-ness” scale while many others take a deeper dive. To my ears the stock tubes hit the sweet spot perfectly. The CDM is even auto biasing to make the rolling process more user accessible. You can see Ken explain the process in more detail here: While the CDM’s single ended side is both transparent and linear, I found myself drawn to the balanced connection’s texture and range. If you are willing to put down the funds to get this amplifier, I highly suggest you invest just a little more in your headphones and take advantage of the balanced output. The dual mono configuration really shines in this implementation. Even IEMs appeared to take advantage of the situation. The JH Audio universal fit Laylas sounded exceptional when listening to the 24bit/192kHz version of Cat Steven’s Where Do The Children Play?. Vibrant and dynamic, the Continental did an amazing job of creating an organic sound while maintaining a clean window to see through. The Laylas do a top-tier job of creating an out-of-head experience for the restrictive in-ear driver technology. Through the CDM the organ sounds from the track sounded even more precise and natural, a very healthy acoustic combination. While the amplifier allows for SE and balanced crossover headphone to source, full size headphones appear to see a slight benefit from keeping with the same type of connection, and between the two a fully balanced setup end-to-end again appeared as a preference. An A/B between the AK240 source produced no frequency anomalies, although some tinkering can most likely be achieved with tube rolling. The CDM masked no detail. While still a great performer for the price, the $500 AK Jr, doesn’t quite have the resolving power of its bigger brother. Through its SE line out connection, the amplifier section of the Continental remained true to the source with no artificial sweeteners or preservatives, just a mild injection of the previously mentioned well-placed hint of tube. Compared to the AK Jr’s headphone output the advantage of CDM is even easier to pin point. Expanded soundstage, a more delicate dimensionality - the entire presentation feels enhanced with increased levels of energy and dynamics. The digital section of the unit is driven by a Wolfson 8741 chipset married to a latest-gen CMedia 6632A USB interface. The connection requires a driver install for DSD usage to a MAC, but all other Apple interactions are driver-free. This includes connectivity for lighting-based iDevices. Both an iPhone 6 Plus and iPad Air worked perfectly out of the gate via a lighting to USB camera adaptor with no additional fuss. From ALO’s site: “We selected this chip after extensive examination of all available reference DAC chips. The WM8741 has exceptional signal to noise ratio and extended dynamic range. It also provides low noise, low distortion and superior linearity. The Wolfson provides high-resolution DSD and PCM playback and offers musically compelling digital filters. WM8741’s minimal phase digital filter is more natural sounding because it has no ‘pre-ringing’ of its impulse response. Just as a piano doesn’t produce sound before a key is pressed, the minimal phase filter doesn’t ‘pre-ring’ its impulse response.” At the market matures around audio DAC chipsets, it seems manufacturers are looking beyond the ESS SABRE 9018 for more natural presentation and easy implementation/programing. The multi-platform compatibility here is a nice touch. The size and heft (not to mention the use of tubes) would probably prevent a consumer from strapping the CDM to an iPod and putting it in a pocket, but its Walkman tapedeck shape is wildly appropriate for any desktop solution. It is portable and can be easily moved, but I wouldn’t recommend just throwing it around like you would a phone due to the tubes. Comparing the digital section to Auralic VEGA ($3.5k) produced interesting results. The much higher price of the VEGA isn’t quite a fair cost comparison, but those extra dollars do an excellent job of manifesting themselves as natural, lived-in musical reproduction. The comparison here revealed much of the same. The VEGA was whimsical with a softer edge but made the already solid digital/analog pairing even more believable. The 8741 gets high marks for resolving power and musicality on its own. The overall feeling of the chipset seems to be in line, if not a step forward from most digital sections in amp/dac combinations that have made it to market in recent years. There were absolutely no aberrations in frequency response that could be pinned on the Wolfson and the level of detail was very impressive. Bonus points to ALO for including a line out to tap into a full stereo or another headphone amp, a feature that seems grossly overlooked in the portable sector. At $1,495 the Continental Dual Mono is the most expensive portable amp/dac combo I have ever reviewed. But with portable players beginning to hit the $3.5 mark the move seemed almost inevitable. It adds just the right amount of fun to the mix without ever being overbearing or colored. It is feature rich in all the right places and leaves very little else on the table. The included stock tubes feel right on the money but allow for tube rollers to fine tune the device to their heart’s content. If the CDM falls in your price range suit up, grab yourself a pair of respectable headphones and lose yourself in the music. The best is only going to continue to get better. Image Gallery [ATTACH=CONFIG]19905[/ATTACH][ATTACH=CONFIG]19914[/ATTACH][ATTACH=CONFIG]19903[/ATTACH][ATTACH=CONFIG]19910[/ATTACH][ATTACH=CONFIG]19904[/ATTACH][ATTACH=CONFIG]19911[/ATTACH][ATTACH=CONFIG]19907[/ATTACH][ATTACH=CONFIG]19912[/ATTACH][ATTACH=CONFIG]19906[/ATTACH][ATTACH=CONFIG]19913[/ATTACH][ATTACH=CONFIG]19908[/ATTACH][ATTACH=CONFIG]19909[/ATTACH] [ATTACH=CONFIG]19916[/ATTACH][ATTACH=CONFIG]19917[/ATTACH][ATTACH=CONFIG]19918[/ATTACH][ATTACH=CONFIG]19915[/ATTACH] Product Information: Product - ALO Audio Continental Dual Mono DAC / Amp Price - $1,495 Product Page - Link Associated Equipment: Source: MacBook Air, Astell and Kern Jr., AK240, iPhone 6 Plus, iPad Air DAC: Auralic VEGA Headphones: Audeze LCD-3, HiFiMAN HE-560, JH Audio Layla (Universal), JH16 (Custom), Beyerdynamic AK T5p Playback Software: Audirvana Plus, iTunes Cables: AudioQuest Victoria, Zu Mission RCA Mk.II-B, ALO SXC 24 2.5mm to 2.5mm balanced Where To Buy: Addicted To Audio (Australia) About The Author Brian Hunter I’m a recovering musician turned audio reviewer. I currently manage and write reviews for Audio-Head.com and freelance with several other publications. I love tech and the tools of music, especially the ones involved in reproduction. After I finished my undergrad degree in business I went to the local community college and got one in photography, which was way more fun. I like it when people have unbridled enthusiasm for something and I have the utmost respect for individuals who try to create, even more for those who are good at it.
  7. Rocky Mountain Audiofest 2011 was the funnest show I've been to in recent memory even though I missed covering a few floors as time ran out Sunday afternoon. I'm not sure if attendance was up, down, or the same as previous years but I had a great time talking to everyone who made the show. I did much more talking than listening to music at RMAF 2011. The C.A.P.S. v2.0 seminar was really fun as was the Windows seminar in the AudioQuest suite. There were a few new products at RMAF this year and a few old products with Series 2 type upgrades. Most impressive were the new products from Peachtree Audio, Stax, Woo Audio, and the never budget friendly Burmester Audio Systems. If this Rolls Royce of music servers fits one's budget at $50,000 then why not pick one up? Life is too short and your money won't do you any good when your dead. (To be read sarcastically with a smirk on one's face). [PRBREAK][/PRBREAK] <b>Teaser</b> <p>Philip O'Hanlon of <a href="http://onahighernote.com/">On A Higher Note</a><a href="http://onahighernote.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> had the most interesting teaser of the show. Philip demonstrated the <a href="http://www.chapteraudio.co.uk/products/notepad/notepad/">Chapter Audio Notepad AirPlay 250</a><a href="http://www.chapteraudio.co.uk/products/notepad/notepad/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> during an after hours session on Saturday. The AirPlay 250 arrived a bit late to make it into the main playback system but I was able to hear it and play with it in a secondary system connected to Vivid V1s loudspeakers. The Chapter Audio Notepad AirPlay 250 supports streaming audio via WiFi up to an <u>unconfirmed</u> 24/96 and via Ethernet up to 24/192. This little integrated puts out 250 watts into 4 ohms and had no trouble powering the Vivid loudspeakers. The AirPlay 250 should ship in December for $2,500. Please excuse the iPhone 4 photo taken under harsh lighting conditions.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/IMG_1645.jpg"></img></center> <b>Peachtree Grand Series</b> <p><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000460-250.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left">In the months leading up to RMAF I'd heard quite a bit about the new Grand Pre and Grand Integrated components from <a href="http://signalpathint.com/">Peachtree Audio</a><a href="http://signalpathint.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a>. Every one at Peachtree was very happy with how the products turned out sonically and visually. I went into the show with high expectations from the new Grand Series of components. After the first few notes were played from a MacBook Pro (USB) through the Grand Integrated and <a href="http://www.sonusfaber.com/en/collection/cremona/'>http://www.sonusfaber.com/en/collection/cremona/">Sonus Faber Elipsa</a><a href="http://www.sonusfaber.com/en/collection/cremona/'>http://www.sonusfaber.com/en/collection/cremona/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> loudspeakers I was hooked. Peachtree has upped its game tremendously with the Grand Series. Sonically the Grand Integrated ($4,299) was one of the best at the show. The Grand Pre ($2,999) was connected to a <a href="http://www.simaudio.com"> Simaudio </a><a href="http://www.simaudio.com"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> amp and <a href="http://www.bowers-wilkins.com/Speakers/Home_Audio/800_Series_Diamond/802-Diamond.html">B&W 802 Diamond</a><a href="http://www.bowers-wilkins.com/Speakers/Home_Audio/800_Series_Diamond/802-Diamond.html"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> loudspeakers. This system was pretty good but I preferred the Integrated combined with Elipsa speakers. I can't wait to hear what the Grand Pre is truly capable of in my own system.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000459.jpg"></img></center> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000467.jpg"></img></center> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000463.jpg"></img></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000469.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Peachtree"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000469.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000468.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Peachtree"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000468.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000465.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Peachtree"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000465.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000462.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Peachtree"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000462.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000461.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Peachtree"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000461.jpg"></a></center> <b> Wavelength Audio</b> <p>Gordon Rankin's <a href="http://www.usbdacs.com/">Wavelength Audio</a><a href="http://www.usbdacs.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> room was truly a computer audiophile's dream. He had all the latest technology, new products, and great sonics. Leave it to Gordon to use the new Thunderbolt Pegasus R4 external drive array from <a href="http://www.promise.com/storage/raid_series.aspx?m=192&region=en-global&rsn1=40&rsn3=47">Promise</a><a href="http://www.promise.com/storage/raid_series.aspx?m=192&region=en-global&rsn1=40&rsn3=47"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> connected to his MacBook Air. In addition to showing a new USB headphone amp Wavelength Audio also displayed the Nuetron 24/192 USB Analog to Digital and Digital to Analog converter. As usual Gordon had very lush sound using his tube amps and DACs throughout the system.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000522.jpg"></img></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000528.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Wavelength-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000528.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000527.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Wavelength-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000527.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000526.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Wavelength-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000526.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000525.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Wavelength-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000525.jpg"></a></center> <b>Ayre Acoustics</b> <p>Transferring a vinyl collection to digital files is about to get easier with the <a href="http://www.ayre.com/">Ayre Acoustics</a><a href="http://www.ayre.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> QA-9. This Analog to Digital converter has XLR analog inputs and USB digital output. RCA to XLR adapters will be provided. The price will be somewhere between $2,750 and $5,000.</p> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000515.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Ayre-Acoustics"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000515.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000514.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Ayre-Acoustics"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000514.jpg"></a></center> <b>Meitner Audio / EMM Labs</b> <p><a href="http://www.meitner.com">Meitner Audio</a><a href="http://www.meitner.com"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> and <a href="http://www.emmlabs.com/">EMM Labs</a><a href="http://www.emmlabs.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a>were on hand to show one of my new favorite DACs the MA-1. Also on display was the EMM PRE2 preamp that will be arriving here at Computer Audiophile in one or two weeks. I have pretty high expectations for the preamp based on what I heard with the MA-1 DAC.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000480.jpg"></a></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000477.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Meitner-Audio-EMM-Labs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000477.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000478.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Meitner-Audio-EMM-Labs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000478.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000479.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Meitner-Audio-EMM-Labs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000479.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000481.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Meitner-Audio-EMM-Labs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000481.jpg"></a></center> <b>Simple Design - Sonore</b> Simple Design's <a href="http://sonore.us/">Sonore music servers</a><a href="http://sonore.us/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> are gathering a nice following in the CA forums and elsewhere including manufacturers like <a href="http://www.mbl-northamerica.com/"> Mbl </a><a href="http://www.mbl-northamerica.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> and <a href="http://www.music-culture.us/">Music Culture Technology</a><a href="http://www.music-culture.us/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a>. The Music Culture Technology room this year featured the new Signature Series Sonore DAC and the Signature Series Sonore Music Server with I<sup>2</sup>S output and Signature upgraded power supply. Simple Design servers we featured in other rooms but as I said earlier I missed covering a few floors as I ran out of time. <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000482.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Simple-Design"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000482.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000483.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Simple-Design"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000483.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000484.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Simple-Design"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000484.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000485.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Simple-Design"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000485.jpg"></a></center> <b>Head-Mania</b> <p>I've always been a huge fan of <a href="http://www.stax.co.jp/index-E.html">Stax electrostatic headphones</a><a href="http://www.stax.co.jp/index-E.html"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a>. The 007 phones were my favorite headphones until I heard the new Stax 009 at this year's show. The 009 headphones connected to the <a href="http://www.headamp.com/electrostat_amps/bhse/index.htm">Headamp Blue Hawaii SE</a><a href="http://www.headamp.com/electrostat_amps/bhse/index.htm"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> were simply luscious.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000533.jpg"></img></center> My favorite product of the entire show goes to <a href="http://www.wooaudio.com/">Woo Audio</a><a href="http://www.wooaudio.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> and its 234 Mono-block headphone amp ($10,000 estimated) connected to a pair of <a href="http://www.sennheiserusa.com/dynamic-stereo-headphones-high-sound-quality_500319">Sennheiser HD800 headphones</a><a href="http://www.sennheiserusa.com/dynamic-stereo-headphones-high-sound-quality_500319"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a>. This is a statement product if I've ever seen one. After listening to these mono-bocks I couldn't get the awesome sound out of my head for the rest of the show. I still remember the sound even as I type this show report. I certainly can't afford to spend $10,000 on a headphone amp so I'll be listening to the Woo Audio 234 at CanJam / RMAF for years to come. Also introduced by Woo Audio was its WDS-1 DAC ($1,099 estimated). The DAC has USB, S/PDIF, AES, and coaxial inputs. I was told the USB input is asynchronous but I've not been able to verify the input mode or the supported sample rates. <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000535.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Woo-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000535.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000538.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Woo-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000538.jpg"></a></center> <center>Woo Audio WDS-1 DAC ($1,099 estimated)</center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000539.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Woo-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000539.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000540.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Woo-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000540.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000543.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Woo-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000543.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000544.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Woo-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000544.jpg"></a></center> <center>Woo Audio 234 Mono-block headphone amp ($10,000 estimated)</center> <b>Burmester - The Rolls Royce of Audio</b> <p><a href="http://www.burmester.de/en/audiosysteme/index.php">Burmester</a><a href="http://www.burmester.de/en/audiosysteme/index.php"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> had its new Reference Music Server 111 ($50,000) on hand at RMAF. This thing is absolutely crazy in a good sense. I can't really say how it sounds as the environment was less than good and I was unfamiliar with every piece of equipment in the system. Features and aesthetics on the other hand were out of this world. The chassis and shiny front plate looked like they could have been pulled from the trunk of a Rolls Royce Phantom. The iPad application that controls playback and volume etc… was designed by the same people who designed the Remote app for Apple. Scrolling through the cover flow interface on the Burmester app was very nice. I didn't see a single slow-down or interruption in scrolling as is so often seen in other apps. One interesting note is that Burmester is the only company in the world allowed to ship an iPad 2 in the box with the Reference Music Server without putting the iPad in Apple packaging. This may be the only packaging that Apple can beat. Simply put, Burmester builds incredible components. Over the top? Yes. Outstanding? Yes. If you have the money, why not?</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000547.jpg"></img></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000548.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Burmester-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000548.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000549.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Burmester-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000549.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000550.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Burmester-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000550.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000551.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Burmester-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000551.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000552.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Burmester-Audio"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000552.jpg"></a></center> <b>Miscellaneous Items</b> <p>The Laufer Teknik <a href="http://www.thememoryplayer.net/">Memory Player</a><a href="http://www.thememoryplayer.net/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> and <a href="http://behold.eu/page.php?en310000">Behold Gentle</a><a href="http://behold.eu/page.php?en310000"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> products. Notice the interesting USB implementation inside the product. What looks like a standard USB cable connects from the case to the internal board.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000499.jpg"></img></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000487.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000487.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000490.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000490.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000491.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000491.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000492.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000492.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000493.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000493.jpg"></a></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000495.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000495.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000496.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000496.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000497.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000497.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000500.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000500.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000501.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-Laufer-Teknik"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000501.jpg"></a></center> <a href="http://www.dcsltd.co.uk/"><i>dCS</i></a><a href="http://www.dcsltd.co.uk/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> was happy to play my 24/96 version of Dark Side Of The Moon via an Amarra playlist. <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000517.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-dcs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000517.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000518.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-dcs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000518.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000519.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-dcs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000519.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000520.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-dcs"><img src="http://images.computeraudiophile.com/graphics/2011/1020/thumb/P1000520.jpg"></a></center> <a href="http://tad-labs.com/en/">TAD Labs</a><a href="http://tad-labs.com/en/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> used the C2000 preamp with built-in asynchronous USB DAC. I have the unit and am currently working on a review. <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000529.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-TAD"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000529.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000530.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-TAD"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000530.jpg"></a></center> <p><a href="http://www.dagostinoinc.com/">Dan D'Agostino</a><a href="http://www.dagostinoinc.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> had his new preamp on static display. The dial moved so elegantly and smooth. This thing is like a fine watch. Note the input labeled Server on the close-up image of the preamp. Nice touch Dan :~)</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000557.jpg"></img></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000559.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-DAN-DAgostino"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000559.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000560.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-DAN-DAgostino"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000560.jpg"></a></center> <p>The <a href="http://www.taelektroakustik.de/index.php?id=45&L=1&P=2&webgruppe=10&sorting=2048">T+A MP 1260 R</a><a href="http://www.taelektroakustik.de/index.php?id=45&L=1&P=2&webgruppe=10&sorting=2048"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> player accepts a few different digital inputs including my USB stick holding Dark Side Of The Moon at 24/96.</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000565.jpg"></img></center> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000566.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-T+A"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000566.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000568.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-T+A"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000568.jpg"></a></center> <a href="http://www.wadia.com/">Wadia</a><a href="http://www.wadia.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> / <a href="http://www.sonusfaber.com/">Sonus Faber</a><a href="http://www.sonusfaber.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000474.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000474.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000476.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000476.jpg"></a></center> <a href="http://jeffrowlandgroup.com/">Jeff Rowland</a><a href="http://jeffrowlandgroup.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000510.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000510.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000511.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000511.jpg"></a></center> <a href="http://bryston.com/">Bryston</a><a href="http://bryston.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> / <a href="http://www.pmc-speakers.com/">PMC</a><a href="http://www.pmc-speakers.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000506.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000506.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000509.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000509.jpg"></a></center> <a href="http://www.german-physiks.com/">German Physiks</a><a href="http://www.german-physiks.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> <center>Click To Enlarge</center> <center><a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000502.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000502.jpg"></a> <a href="http://images.computeraudiophile.com/graphics/2011/1020/large/P1000503.jpg" class="thickbox" rel="RMAF-2011-AUDIO-SHOW-misc"><img src="http://images.computeraudiophile.com/graphics/2011/1020/small/P1000503.jpg"></a></center> <p><a href="http://www.vtl.com/">VTL</a><a href="http://www.vtl.com/"><img src="http://images.computeraudiophile.com/ca/icons/ex.png" style="padding: 0pt 0pt 0pt 3pt;" alt="link"></img></a> Siegfried Series 2 Amps with TAD Reference 1 loudspeakers</p> <center><img src="http://images.computeraudiophile.com/graphics/2011/1020/medium/P1000531.jpg"></img></center>
  8. The first day of RMAF 2012 I spent the majority of my time in the expansive CanJam area. It's always fun to see and hear elaborate headphone systems capable of great sound. I'm also looking for a new pair of headphones thus my interest in this area was even greater than previous years. I spent a considerable amount of time at the Moon Audio booth listening to the Fostex TH-900 Premium Reference Headphones. I like that these phones are closed-back allowing me to listen in areas where the noise from an open-back headphone might be annoying to those around me. Paired with the Bryston stack of BDP-1, BDA-1, and BHA-1 the Fostex TH-900 were very impressive. Maybe a tad bass heavy but that's not a final judgment as I really should listen in a quieter environment. The build quality of the TH-900 headphones is stellar. I've yet to see the beauty of these phones reproduced in any photos. I did my best in the photos below. Another headphone I'm seriously considering is the open-back planar Audeze LCD3. I spent time with the LCD3 at the Schiit Audio booth. The electronics were a Mjolnir headphone amp and Gungnir DAC. I think the LCD3 sounded pretty good but any conclusions made while auditioning an open-back headphone in a loud ballroom would be foolish. As usual I stopped to see Jack Woo at the Woo Audio booth. Jack always has a unique product or two that I photograph as if I'd seen the Loch Ness Monster. This year I was very impressed with the Woo Audio WA7 headphone amp and asynchronous USB DAC. The WA7's can't miss feature is a glass block that rests on top of the amp/DAC. However, this bock is not only for aesthetics, it also serves as a tube guard. Much like the Fostex TH-900 headphones the Woo Audio WA7 looks much better in person. The WA7 looks like a jewel that will fit in nicely on any home or office desk. It was a pleasure talking to several CA readers in the CanJam area as well. Notably the reader from my home state of Minnesota who inherited a friend's Klipsch speakers upon his passing. What could be more powerful than listening to great music and remembering great times with an old friend? Moon Audio Bryston - BDP-1, BDA-1, and BHA-1 Fostex - TH-900 [ [ Schitt Audio - Mjolnir, Gungnir Audeze - LCD3 [ [ Woo Audio - WA7, WES [ [ [ [ [ Head Amp - Blue Hawaii SE [ [ Cavalli Audio - Liquid Fire Fosgate - Signature Tube Headphone Amplifier Fostex - HP-A8C [ [
  9. The Oppo HA-1 is a harvester of many tricks, so many in fact that it is almost unfair to label it strictly a headphone amplifier as the acronym in the name suggests. It really stretches the boundaries of inputs, outputs and digital conversion all within a reasonable amount of desktop real estate. As with all things Oppo, attention to detail appears to be a top priority, even down to the packaging. In a market where the focus on sound quality can allow manufacturers to slip by with off-the-shelf interfaces and external design, the Oppo ship is watertight. In rare form for most HiFi equipment, the head amp includes a fully interactive graphical interface, complete with pretty icons for source selection. Connectivity is king with the HA-1. Nearly every single base is covered. In the rear you can find super DSD-friendly USB, single ended ins and outs, balanced XLR ins and outs, and one of each type of available digital input (including optical, coaxial and AES/EBU). To top it all off Oppo included both an in and out trigger and Bluetooth connectivity with aptX. An external remote is included, but in case you don’t want another one lying around the house, Oppo even has a remote app for your perusing pleasure that connects via Bluetooth. [PRBREAK][/PRBREAK] The front panel has a standard ¼ inch headphone jack, 4 pin balanced XLR for headphone and USB input for iDevices. It’s practically a new gold standard for headphone amps that has yet to see an equal. In truth, Oppo could have likely gotten away without the head amp section and charged the same, if it weren’t for its highly regarded BDP-105 Blu-Ray player whose feature set and price overlap with the HA-1. If we were to look at the HA-1 through a lens of personal audio the only thing that is missing is a dedicated 3.5mm headphone jack for IEMs, like the one found on the new WA7d by Woo audio. While running the amp through the paces the ¼ inch jack did display just a very slight hum through the ultra sensitive JH Audio JH16s (the 16s do come in lower than the recommended impedance of 32-600 ohms for the amp). The upswing is that volume control was delightfully distributed, even for IEMs (allowing for a nice gradual increase that peaked around 11 o’clock) and the hum wasn’t really audible at all while music was playing. All in all the HA-1 still gets the check box approval for IEMs. Simply tapping into the USB Apple connection on the front panel with the JH16s noticeably cleaned up the sound when compared to the plugging directly into an "old" 6th gen iPod Nano’s headphone output. The rated output impedance for the class A amplifier is an impressive 0.5 Ohm and 0.7 Ohm for both the balanced and SE connections respectively. The 4.3 inch display screen features color, but is not touch sensitive. The menu is easily navigated via push-capable source selector knob. Simply rotating the knob brings up the previously mentioned "pretty" icons indicating the source, of which there is an applause-worthy eight in total. Pushing deeper into the menu allows you to pick from three pre selected home screen display setups, two of which animate while music is played through the device. The "VU meter" option pays a little homage to the McIntosh look, while the "Spectrum" home screen makes for a pretty fun, visual frequency representation. Like the BDP-105, the 13 lbs. HA-1 is very heavy for its size. Fit and finish is simply outstanding and puts many higher priced audio products to shame. The connectors in the back feel very secure against the back panel and do not wiggle or feel loose when applying cabling. The box itself has a nice shape to it and even though it is a bit deep, most users should be able to find enough space for it on a standard sized desktop. Some of that extra weight no doubt is a contribution from the toroidal power supply. From the Oppo website: "A toroidal power transformer offers superior power efficiency and much lower exterior magnetic fields over traditional laminated steel core transformers. The HA-1's toroidal linear power supply provides a very clean and robust power source to the audio components." Even though it may be inconsequential to some audiophiles, its worth mentioning that the power cable that comes with amp is one of the beefiest I’ve ever seen packaged with a piece of audio equipment, a fine testament to Oppo’s value proposition. The volume control knob offers up a fair resistance when turned and feels solid to the touch. While the on board screen suggests a digital volume control with another pretty animated graphic, Jason Liao from Oppo cleared the air with regards to the potentiometer. "The volume control in the HA-1 is purely analog. One of the design goals of the HA-1 is to keep the signal in analog domain once it leaves the DAC. Since the HA-1 is a fully balanced design, we use a 6-gang precision potentiometer part for the volume control. Each left and right channel is controlled by 2 gangs of the potentiometer. We use the fifth gang for sampling the position of the knob so we can display the approximate volume level on the LCD screen. The potentiometer has a motor-driven mechanism so it can be remotely controlled via IR remote or Bluetooth app. A nice feature of the motorized volume knob is that when you change the amplifier’s setting from NORMAL gain to HIGH gain, the HA-1 will mute the audio, turn the volume knob to reduce it to a safe level, and then un-mute. This can greatly reduce the surprise when someone changes to HIGH gain and gets a loud sound." Among the many inputs of the HA-1 lies another interesting add on for a head amp, Bluetooth. The tech requires the addition of included external antenna, but the small piece barely peeks out from behind the amp and extends the range to an admirable distance. The application is threefold. Pair with a computer or smartphone as a source, pair with a Bluetooth-capable headphone as an output and pair with a phone/tablet as a remote control. The HA-1’s Bluetooth is 2.1 +EDR and supports both the SBC and buzz worthy aptX audio transmission formats. Switching between the über resolution of the USB connection and Bluetooth revealed an unsurprising slight loss of dimensionality, but was still surprisingly adequate for a quick connection from a mobile source in a pinch. The coinciding "HA-1 Control" app for smartphones provided a pretty seamless extension onto the OS. Volume control, input selection, mute and up/down track selection all worked without a hitch, but the BT connection did suffer a small quirk. Bluetooth connectivity is powered off when the head amp is powered down so you can turn off the HA-1 from a phone, but not on. The app makes you aware of this by closing down completely after tapping the orange power button from within the software. You need to manually turn on the amp before restarting the application. Overall the user experience with the app is straightforward and practical. The volume control physically rotates the knob on the unit and even displays the current dB level remotely. The main silicone pushing conversion duty is the popular ESS SABRE 9018. The digital section of the HA-1 operates like a 9018 with proper implantation, which is to say it sounds pretty darn spectacular. The overall effect is pleasantly transparent, especially considering the going price for the amplifier. Plenty of top end air, excellent extension on both ends and a fine, crisp resolution mark just some excellent highlights of the "ESS patented 32-bit Hyperstream™ DAC architecture and Time Domain Jitter Eliminator" ES9018 implementation in the Oppo. The included asynchronous USB connectivity is now becoming a bit of a standard feature for almost any up-to-date DAC, but DSD compliance isn’t quite there yet. The HA-1 does allow for playback of DSD64, DSD128 and even DSD256 if you happen to cross paths with a file that requires it. There is perhaps a slight edge to the sonic retrieval, favoring detail over organic delivery, which became more apparent when comparing to the higher priced Auralic VEGA. For nearly 3Xs the price and sans head amp, the VEGA was able to add a subtle layer of naturalness to the equation, but the much of same coveted ES9018 house sound could be found in the HA-1. As the Oppo DAC was put through the paces, it was increasingly impressive how well it scaled up to the occasion. Dedicated amplifiers like the Questyle CMA 800R and Auralic Taurus really swung out under the influence of both the SE and balanced output feeds. The soundstage from the DSD version of Norah Jones Turn Me On makes for a fairly impressive headphone demo. The organ sound through the HA-1’s balanced outputs was so spicy it almost felt like you could reach out and wave your fingers though the fluttering sonic tapestry it painted. The front and center vocals appear with plenty of virtual air and space to separate them from the rest of the well-placed instruments. The tonal sum here still nods in the direction of BDP-105’s composure but is housed in a much smaller suitcase. Most of the critical listening of the headphone amplifier section of the HA-1 was done through the 4 pin balanced headphone output on the low gain setting. The headphone sample used included both Oppo’s matching PM-1 planar magnetic headphone and the Audeze LCD-3 as a reference. Balanced output from end-to-end was definitely top of mind when the HA-1 was designed. "The internal analog audio signal path of the HA-1 is fully balanced. For digital audio, the signal runs in balanced mode all the way from the DAC to the output jacks. Balanced analog input is kept intact, and single-ended input is converted to balanced at the input buffer. All single-ended outputs are derived from the balanced signal as well. The balanced design provides better common-mode noise rejection and improves signal quality. The balanced headphone output provides twice the voltage and four times the power of the single-ended output, enabling the HA-1 to drive the most power hungry headphones. It also provides better channel separation by eliminating the common ground return path." There is a timbre richness to overarching sonic texture that accompanies the amplification stage. Samples cut from the balanced line outs confirms it existence, but also reaffirms that its impact is only slight. While this sonic affluence may be polarizing for some, those with a taste for texture will find the signature right at home. The response remains strongly linear, focused and very easy to listen to. Dynamic response, low-end impact/extension hit hard and fast like a well-oiled solid-state amp should. Oppo makes it easy to see why the HA-1 is so much more than just a simple headphone amplifier (although it can be easily isolated and utilized via the SE and balanced inputs). With both single ended and balanced outputs in addition to a wide cross section of source capabilities it is a virtual Swiss army knife of head amps. Perhaps one of the overlooked extensions of this metaphor sits quietly under the volume knob. The USB iDevice connection really brought out the best from iPods with a deliberate and discernible improvement. Jam packed with features, the HA-1 holds a nearly endless supply of applications to improve your desktop listening. Summary From a straightforward up-to-date techs-and-specs position the Oppo is currently unchallenged at its price point. It is a features-driven product with spectacular results. It is so much more than a headphone amplifier in the same fashion that an Oppo player is so much more than just a Blu Ray transport. Innovation, durability, flexibility and enough connectivity specs to make your head spin give this little contender both its charm and its value. Its on hand compatibility paired with a sleek digital side makes it one of the most complimentary components for desktop listening in the sub $2000 range. [ATTACH=CONFIG]13412[/ATTACH] [ATTACH=CONFIG]13413[/ATTACH] [ATTACH=CONFIG]13410[/ATTACH] [ATTACH=CONFIG]13411[/ATTACH] Product Information: Product - Oppo HA-1 Headphone Amp & DAC Price - $1,199 Product Page - Link Associated Equipment: Source: MacBook Air DAC: Auralic Vega Headphones: Audeze LCD-3, Audeze LCD-XC, JHAudio JH16, Oppo PM-1 Amplifier: The Calyx Integrated Loudspeakers: Zu Soul MkII Headphone Amplifier: Auralic Taurus MkII, Questyle CMA 800R Playback Software: Audirvana Plus, Decibel Cables: Zu Mission RCA Mk.II-B, Wywires Silver About The Author Brian Hunter I’m a recovering musician turned audio reviewer. I currently manage and write reviews for Audio-Head.com and freelance with several other publications. I love tech and the tools of music, especially the ones involved in reproduction. After I finished my undergrad degree in business I went to the local community college and got one in photography, which was way more fun. I like it when people have unbridled enthusiasm for something and I have the utmost respect for individuals who try to create, even more for those who are good at it.
  10. As a follow up to the recently released Auralic VEGA Dac, designer Xuanqian Wang decided to give his Taurus balanced headphone amplifier a refresh with the newest MkII revision ($1,899). The new version employs the same silver minimalist stylings as the VEGA and allows for both single ended and balanced headphone connections. As an added bonus he chose to include a pair of SE and balanced outputs, so the Taurus MkII is free to take on pre amplifier responsibilities as well. I am a big fan of the VEGAs design and build. The entire unit felt well kempt and detail-oriented. Likewise the Taurus is solid from top to bottom. While the 3 legs its chassis rests upon is designed to reduce vibrations from entering the component, plugging cables in to the back turned out to be slightly more prone to tipping left or right than the conventional 4 leg setup. Minor quibbles aside, everything works as it should. The Taurus runs though the courses with the expected panache of the full high-end experience. Its relatively heavy weight convinces you its innards are chock full of lovely audiophile-oriented components. Indeed, the size is the same as the VEGA, which was a fine choice by Wang. The chassis still large enough to be taken seriously (especially for a solid state head amp), but not so big that it takes up two parking spaces on the precious real estate of your desktop. It even makes a fine visual pairing with the Macbook Air I reviewed it with. Similarities between the two are easy to spot, the finish bears a close resemblance to the recognizable laptop line and the footprint is almost exactly the same. [PRBREAK][/PRBREAK] While not as quite as smooth to turn as the VEGA’s knob (which augmented the volume purely in the digital domain), the Taurus’ analog adjustment shares the same understated half-an-egg look and feels both deliberate and consistent to the touch. The volume sweep from low to high was well distributed and didn’t jump too quickly to louder listening levels. Both the singled ended ¼” and four pin XLR balanced jacks are tucked neatly into the front panel. The accompanying input and output switches keep things simple and direct. The “BAL” setting on the output toggle adds just bit of gain to the equation over the unfortunate acronym “STD” (for standard) unbalanced setting. Wang elaborates on these two modes, “BAL mode is true balanced driving (bridged driving, aka BTL). The STD mode is the typical singled-ended driving mode, even if you use the 4 pin balanced output. The input method does not affect the output mode. You can use a RCA input and still take advantage of the BAL output, the internal circuit will transfer the single-ended input signal to balanced one and drive the headphone.” The semi gloss black back of the unit features a fine array of input and output choices all clad with connections that feel like a step up in quality. While many of the headphones I had on hand sounded outstanding through the Taurus, I found a nice synergy with the Audeze LCD-3 headphone. In fact, Wang let me know that this latest version even included a few new updates to help optimize performance for headphones like the LCD-3, including modifications to the input buffer circuit to insure lower noise levels. If nothing else, the four-pin XLR connection choice by Wang certainly allows for easy stock cable pairing with the Audeze headphone. The overall power driven through the amp is adequate for even the toughest to drive cans (2000mW into 300 ohms balanced). In BAL mode, the amplifier allowed for normal listening at a mere 10 o’clock. While a balanced configuration doesn’t always carry the same impact in every setup, I did find its implementation with the LCD-3 to be preferable over the SE connection (and STD setting) from the Taurus. I noticed more upper air and an even wider soundstage to set the music upon with very little else sacrificed in the transition. The 24/96 Fleetwood Mac classic Dreams features an identifiable high hat sound that hangs tenaciously in the right channel. The balanced connection created a sensation that swung this instrument sound further out than its SE counterpart. Any improvements to get the sound out of my head and placed more eloquently in front of (or around) me is always a welcome change when it comes to headphone listening. Switching the output switch back and forth between BAL and STD mode garnered even more subtleties on the low end. BAL produced fuller bass presentation and perhaps even a larger emphasis overall. Nothing even remotely close to a “boost”, but rather a simple, eloquent elaboration of the bottom frequencies. Through either mode frequency response was as uniform and smooth as you would expect from an upper tier solid-state amplifier. Highs ring true with a natural transparency and are not overtly shrill or colored. The low end was equally impressive. Though a somewhat peculiar song overall, Hella Good by No Doubt has a very engrossing and interesting bass section at the start of the track. On lesser systems, much of the detail that is available within this frequency band section can be missed. Not merely a test of extension and fullness, the unique texture of the bass sounds provides even more insight into your systems presentation and capabilities. The Taurus did an outstanding job of translating this information. Fullness and texture rang true to form. I found myself really enjoying the bass shape and reach throughout my listening sessions. Amid the monstrous low-end gravity, I was still able to clearly identify the intricacies of the scratchy overtones that accompany this section. The Taurus faded into the woodwork (in a good way) across many of the genres I threw at it. Simple, transparent and not overly boastful at any frequency, music flowed eloquently through the device with relative ease, making headphones pairings a bit easier. Still, I stuck with the LCD-3 for most of my evaluations as it was one of my preferences in a balanced setup from the Benchmark DAC2 D I used as a source. Through the Taurus, headphones were able to deftly deliver less of a “canned” sound and earned full marks for naturalism. Wang went into further detail on the tech of the amplifier; “The ORFEO output module makes a substantial contribution to the sound of the Taurus as it is a class-A design. By utilizing a mass number of small power components rather than one big one we were able to deliver better linearity with lower distortion and also allow for bigger output power at reasonable size. We also implemented an ultra-low noise high input impedance buffer circuit, which helps pass more of the musical detail from the recording to your ear.” Detail was present and accounted for. Imaging was sharp and focused as any amplifier in this price range and trickled down into the naturalness of the whole listening experience. The recorded sounds from drum kit tom toms are fairly difficult to reproduce with any sense of realism. Perhaps one of the most overlooked pieces of percussion, I find their sound to vary quite a bit upon playback, marred by flat, generic or odd tone. Toms are usually overpowered by everything else going on, and their rather infrequent use isn’t going raise them as a priority production element any time soon. At the end of the day, these filler drums rarely sound the same in recordings as they do when you sit behind the kit. That being said, I did feel the Taurus helped this “second tier” drum situation course correct a bit. Drum fills across the board felt slightly more dimensional and true to life. If a quick accent popped up, the dynamics remained more intact. When a tom fill sped across the soundstage from right to left, its arc felt wider and more luxurious in its travels. As I listened to the Doors Love Her Madly it was easy to pick out each individual instrument from the stereo field. John Densmore's drums are set just to the right side of center within the track. While not panned nearly as far as the early Beatles recordings, its virtual location was easily determined and yet completely separated from Ray Manzarek's tell tale organ across the clear, intentional sonic stage. Everything was laid out beautifully in the field for all to see. I even discovered an understated tambourine section during the chorus I hadn’t noticed before. The location of instruments (including Morrison’s voice) was precise and focused. Unruly clarity and distortion can rob music of its dimensionality, like peering at a mailbox through cloudy window with one eye. The Taurus did an excellent job of evading such pitfalls. Through the amplifier music appeared as it was intended, where it was intended. As a pre amplifier the Taurus performed admirably. I introduced the unit into my loudspeaker setup between my Oppo BDP-105 source and Calyx Audio Femti power amplifier (as opposed to running the Oppo direct to the Calyx). Relative dynamics and responsiveness improved in a similar fashion to the Auralic VEGA's performance as a pre amp. While the lack of remote (for the Taurus) makes it an unlikely scenario for a full size rig, those adventurous enough to employ an array of desktop loudspeaker components may find use of it. As far as dedicated headphone amplifiers go, the Taurus is a versatile piece. Its balanced options and affinity towards the Audeze LCD-3 make it a must-try if you already own the headphone. It’s presence is comprehensively subtle, but engaging none-the-less. The amplification it supplies is accented by firm bass, a wide stage and accuracy with very little external coloring. While amplifier options at this price point start to broaden, the Taurus keeps up with expectations. The simplistic external design and build is equally as impressive as the svelte matching VEGA DAC and the overall sonic experience is just as enjoyable as its digital brother. Backed by a well-rounded source, the Auralic Taurus would make a fine supplement to an audiophile’s desktop rig. Taurus MKII Gallery [ATTACH=CONFIG]7899[/ATTACH] [ATTACH=CONFIG]7896[/ATTACH] [ATTACH=CONFIG]7900[/ATTACH] [ATTACH=CONFIG]7897[/ATTACH] [ATTACH=CONFIG]7902[/ATTACH] [ATTACH=CONFIG]7898[/ATTACH] Product Information: Product - Auralic Taurus MKII Balanced Headphone Amp Price - $1,899 Product Page - Link Where To Buy: Audio Philosophy Associated Equipment: Source: MacBook Air, Oppo BDP-105 DAC/PreAmp/HeadAmp: Benchmark DAC2 D Additional Headphone Amplifiers: Woo WA6SE, ALO International Headphones: Audeze LCD-3, Sennheiser HD650, Sennheiser Momentum, JHAudio JH16, Grado SR80, V-Modo M80 Amplifier: Calyx Femti Loudspeakers: Zu Soul MkII Playback Software: Audirvana Plus Cables: AudioQuest Victoria, Custom JE Audio Design Cables About The Author Brian Hunter I’m a recovering musician turned audio reviewer. I currently manage and write reviews for Audio-Head.com and freelance with several other publications. I love tech and the tools of music, especially the ones involved in reproduction. After I finished my undergrad degree in business I went to the local community college and got one in photography, which was way more fun. I like it when people have unbridled enthusiasm for something and I have the utmost respect for individuals who try to create, even more for those who are good at it.
  11. Brian

    Woo Audio WA7 Fireflies

    For those not familiar with Woo Audio’s offerings, the USA-based company has been making high performance loudspeaker and headphone amplifiers for several years out of New York. Owner Jack Woo has successfully piloted the company and built a substantial reputation for quality-made tube stage amplifiers. While the full product rundown includes loudspeaker implementations, most of Woo’s foothold in the marketplace comes directly from its large, perfectly incremental headphone amplifier product line. From their entry level single-ended OTL WA3 amp ($599) to the behemoth WA234 monoblocks ($15,900) Jack and the team have a little bit of something for everyone interested in analog listening. Keeping up with the times requires a bit more than just creating price touch points across a scale. The newest version of the WA7 Fireflies firmly addresses these changes in technology while also tapping into that elusive harmony which happens when the digital and analog realms collide. The two-part package starts at a cool $999 for the WA7 with a solid-state power supply by itself, with the WA7 tube power block costing an additional $749. Bundled together however, you will be able to save a little bit of scratch as the full tube package purchased at the same time will cost a mere $1,599.[PRBREAK][/PRBREAK] Both the solid state brick and matching tube cube attach themselves to the back of the main WA7 unit via a DC input port located on the back panel. A further inspection of this rear faceplate reveals why this new product is the interception of new and old. One of the first Woo products with an internal digital section, the new WA7 also receives USB input up to 24/384kHz. A pair of single ended RCAs can be found in close proximity to the digital port, and cleverly doubles as both an analog input and as an analog output for the USB connection. A three-way switch allows you to toggle between the USB/RCA inputs and analog outs. There is a two level low/high gain switch as well as a power toggle, however, if you purchase the WA7 the mirrored round knob on the front of the power supply also acts as an on/off switch when pressed in, but lacks a function for its rotational capabilities. When activated, the WA7 presents itself with a very satisfying glow from the four tubes that sit on top of the cubes. The main amplification of this desktop digital combo is pure tube class-A topology (with no semiconductors in the amplification path) and comes stock with a pair of matched Sovtek 6C45 glass for the main amp and RCA 5963 NOS for the tube power supply. Woo also sells additional tube upgrades direct from their site, and the amplifier is of course susceptible to all matter of tube rolling options that add an additional layer of customization to the hobby. The Sovtek 6C45 triode assumes both driver and power tube responsibilities. Perhaps one of the most eye-catching features of this combination amp/DAC is the solid block of glass that sits atop both boxes that allows the tubes to remain delightfully visible while providing a protective shell of sorts against random collisions for the tubes. The fully transparent block is striking and adds to the overall design in a very interesting way. It is important to note that the block does indeed rest on the unit and is not secured to the surface in any manner. It didn’t prove to be an issue during use, as general care is very much recommended whenever hot external tubes are employed in the design of an amplifier. The glass blocks did manage to do a significant job in dispersing the heat generated from the tubes. The lower section warms up a little as expected, but the top of the glass remains relatively cool to the touch. The WA7 comes together with an appearance that resembles a perfect cube, which proves to be a very pleasant design element to its overall cosmetic appeal. Its art-ish sensibilities do a great job of bringing something more visually to the desktop, without overdoing it. Like all things Woo, it is quite heavy for the size and feels durable against the elements of time. Even the little rubber feet on the bottom of each unit feel secure, while still responsive enough to absorb vibrations in proper form. There are two single ended headphone connections located on the lower right corner of the main amplifier unit. While the ¼” output may act like your typical full size audiophile headphone jack, the 3.5mm does not. Woo provided some more light on the subject: “The 3.5mm is designed for extremely sensitive IEMs, specifically made to deliver an ultra-low noise floor for these type of earphones. The 1/4” output is for all other headphones (8-600 Ohms).” In execution the 3.5mm did complement a pair of JH Audio Layla IEMs very well by allowing for a more even volume sweep with a reduced chance for low-level channel imbalance. The jump from no volume to ear bleeding can be frighteningly thin when it comes to sensitive IEMs plugged into full size amplifiers. The extra layer of security here was a welcome one in this scenario. So what makes this new version of the WA7 different than the previous iteration? According to Woo there have been several updates, including a new “high-resolution audiophile-grade DAC, improvements to the voltage regulator and the DAC is now powered by a linear PSU for better performance. There is also a new OP amp output stage, improved analog circuit, Teflon tube sockets, high-retention USB connector (orange color) and enhanced tube glow.” Specifics on the new choice of silicon boiled down to the SABRE ESS 9018M for digital signal management. “We tested many DAC chips, USB controllers and circuit designs. The ESS 9018M with XMOS controller sounded most musical. The new DAC supports Hi-Res up to 24/384kHz and is iOS/Android compatible with appropriate adapter, previously it was 32/192kHz.” The digital section indeed feels very 9018. While the chipset can vary quite a bit upon implementation, there is a mild consistency to the sound, if it is done correctly. Some high priced standalone DACs have been known to push the 9018 series even further, but its commonality in portable amp/DAC combinations as of late raises its frequency in the wild to near “everyday” values which help push the new benchmark for performance even higher than it was just a few years ago. The same holds true with the WA7, it is well executed and clean. No significant missteps in the transfer and no driver needed for connecting to my Macbook Air. Utilizing Audirvana Plus it was easy to select the DAC as the preferred audio device from the preferences menu. The digital connection showed up as “xCORE-AUDIO Hi-Res 2” and played succinctly without any further issue. The USB input comes off detailed and accurate with the tube section of amplifier rounding out the sound in an agreeable fashion. Comparisons to the more premium priced Auralic VEGA ($3,499) from the unbalanced inputs highlighted the organic and natural presentation the VEGA is known for, but put up a good fight in terms information retrieval and firmness. Overall the digital section feels accurate and on point for any 9018 in this price range. Given the output capabilities (which are surprisingly rare with these type of all-in-one units) additional value is piled on top of an already solid digital conversion story. The house sound of Woo has always managed to avoid a Goldilocks scenario with regards to “how much” tuby-ness it seeks to employ. The bed it chooses to lie in always supplies the right amount of warmth without leaving the mids too loose or allowing the low end to get destroyed in a grand wave of slushy softness. The “sweet” sound is there with the WA7, but it’s not in your face waving its hand wildly for attention. The subtlety of it all drives your music with a pleasant demeanor, one that can often counter-balance the directness of the room-less headphone listening experience. Listening to the 24/96 version of Jason Mraz’s Everything is Sound provided a very open representation of the fairly dynamic and varied track. The vocals to the introductory verse sounded robust and textured with a pleasing timbre. As the first signs of the backing band appear in the track, it was easy to pick out the left and right stereo location of the keyboard (right), organ (left), guitar and sax as they jumped around in the sound field. As the bass enters the scene the overall appeal leans to a more smooth presentation that is very easy to listen to. It is equal parts relaxed inspiration and dynamic stability that provide much of the allure to the analog-inspired sonic portrait of the WA7. Vocals arrive in a balanced contribution to the picture, falling neither back nor too far forward against the rest of the spectrum. Bass response is clear and never overcooked and the treble doesn’t take on any additional screech or sibilance during the amplification process. The extension upward feels natural and airy. Cymbals don’t sizzle or crackle at loud intersections but rather communicate a more buttery aggregation of high-end sonics during energetic passages. From end to end the 9018 provides a nice platform that complements the traditional Woo prowess of amplifier construction. In/out rights from the analog RCAs maximize the feature set while keeping real estate to a minimum. The external design of the WA7 looks like a thousand bucks, which is convenient considering the going rate for the solid state option falls closely in line with the sentiment. Its easy to say that any design elements that deviate from the norm cause the populace to pick sides, but in the case of this Woo unit most will likely agree that its break from the masses is one for the better. Talk piece combined with audiophile analog traits make the all-in-one unit a fine complement to any upscale desktop or the top shelf of your audio gear rack. If you are a fan of Woo gear already then trust this newest addition to the family puts a fine digital foundation behind the house sound of the company. It appears that a lot of thought has gone into implementing the proper combination of in/outs/features for Woo’s resurging everything-in-a-box. Certainly one of the highlights is the forward thinking dual headphone output, carefully prepared for the headphone that is most likely to utilize the jack size. The overall size of the WA7 is big enough to be taken seriously, but not so much that seriously takes up space. Tonality from the device is a reasonable extension of company’s origins but picks up the latest updates to stay current with market trends. Its packed with enough power to drive all the latest headphones to sufficient levels without a hint of strain, but yet is also capable of delivering music that is free of hard edges while remaining significantly true to the original source material. The WA7 Fireflies is a tight package on many fronts. Image Gallery [ATTACH=CONFIG]24906[/ATTACH] [ATTACH=CONFIG]24913[/ATTACH] [ATTACH=CONFIG]24910[/ATTACH] [ATTACH=CONFIG]24907[/ATTACH] [ATTACH=CONFIG]24911[/ATTACH] [ATTACH=CONFIG]24912[/ATTACH] [ATTACH=CONFIG]24909[/ATTACH] [ATTACH=CONFIG]24908[/ATTACH] Product Information: Product - Woo Audio WA7 Fireflies Price - $1,599 Product Page - Link Associated Equipment: Source: MacBook Air DAC: Auralic VEGA Amplifier: Questyle CMA 800R Headphones: Audeze LCD-4, HiFiMAN HE-560, JH Audio Layla (Custom), Beyerdynamic AK T5p Playback Software: Audirvana Plus Cables: Zu Mission RCA Mk.II-B About The Author Brian Hunter I’m a recovering musician turned audio reviewer. I currently manage and write reviews for Audio-Head.com and freelance with several other publications. I love tech and the tools of music, especially the ones involved in reproduction. After I finished my undergrad degree in business I went to the local community college and got one in photography, which was way more fun. I like it when people have unbridled enthusiasm for something and I have the utmost respect for individuals who try to create, even more for those who are good at it.
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