Jump to content
  • ted_b
    ted_b

    Chord Electronics QuteHD Review

    thumb.jpg

     

    1-Pixel.png

     

    Confessions of a DSD-Aholic, by Ted Brady

     

    One aspect of being able to have review/demo units on one’s system for review (thank you Chris) is that there comes a time when you need to send them back. And although I’ve demo’d dozens of DACs over the years I’ve never really experienced the angst that a return could bring on. Until now…

     

    I really miss the Chord QuteHD. There I said it; I was once a strong man of principle, and now reduced to a weak yearner of days gone by. In reality, I borrowed the Chord for WAY too long a period (as some of you who know me understand that this review is like 4 months late ☺) and I thank the NA distributor, Jay and Katherine Rein of Bluebird Music, for their patience…which ultimately I tested for too long of a period. I don’t blame them at all. ☺ But I do miss that thing.

     

    OK, so why did I have the Chord for so long, and what is it about the thing that I miss? Well, this story ultimately began when I first discovered the DSD format back in September of 2011. [PRBREAK][/PRBREAK]I bought the Mytek, what I consider the first consumer DSD DAC any of us were able to get our hands on. For $1600 or so it opened me up to a whole new treasure trove of hirez music, and seemed to present that music in a new almost-light-and-airy natural way…especially piano. Something was different, and the tonality, attack and decay of the struck piano keys took on a realism I’d never really heard before. This was especially true of native DSD recordings like Pentatone’s Beethoven Piano Sonata cycle by Mari Kodama. I owned the SACDs but none of the 9 or 10 SACD/universal players (some modded and tubed) I had evolved through could present this presence and the feeling of instrument-in-the-room like a DSD-capable Mytek DAC.

     

     

    Fast forward to me hunting for even better (and way more expensive) DSD playback solutions. I settled on the wonderful Meitner MA-1 as my new reference (with the still relevant high value Mytek running my home office system). By this time I had hundreds of DSD albums in my file-based collection and was almost exclusively listening to the DSF file format. I was hooked. The Meitner took Mari Kodama and placed her and her Steinway in my music room almost scarily, where I would need to make sure I was wearing black tie outfits to listen to these glorious Beethoven sonatas, for fear of embarrassing her in my sweat pants. (OK, sorry, just kidding, of course…I look great in my sweat pants!).

     

     

    Over the next two years I became enthralled with everything DSD, and eventually converted my entire SACD collection to this wonderful format, while also helping lead the way for DSD download websites like Cookie Marenco’s BlueCoast Records to become more popular here on Computer Audiophile as well as other forums interested in hirez music. My Meitner continued to play back everything I threw at it, DSD-wise, at a level that other new DSD-capable DACs couldn’t quite match. It should, though; it lists for $7k and contains unique 1 bit engineering that is a huge advantage when playing back 1 bit music.

     

     

    Enter the Chord QuteHD DSD-capable DAC in early summer 2013. It was almost laughable in its small-ness, and came at the DAC world with so many left-field approaches that I assumed it was going to be not-for-me. My first concern was its silly led lighting; looked like a Star Trek design that was an indication that Chord needed wow-factor to overcome poor performance. (Note: I really miss that led-light, and now wish every DAC had it).

     

     

    Second, the Chord comes out of left field (pun intended) with Field Programmable Gate Arrays on its chip design, a sort of DIY for the digital engineers to roll their own signal processing and digital filters. Why? Others weren’t using this design, certainly not in a DA priced at under $2k. I was hesitant to embrace a DSD-capable DAC that didn’t use a one-bit architecture or popular multibit SDM chips to play back DSD. (Note: Whatever the heck Chord has done with their FPGA design at $1799 it has put me on a mission to hear other implementations). (Second Note: By the way, just two weeks ago UK’s Paul Rigby wrote a nice review of this DAC on Audiobeat, and the article includes a lot of good technical background from Chord’s own Rob Watts; I invite anyone interested in the tech reasons behind picking FPGAs and other internal parts to read that review).

     

     

    Also, the Chord came with a 12V laptop-style SMPS power supply that plugged into the back of the unit. It looked like any standard wall-wart style ps, and I was once again reminded that this little DAC cost well under $2k. (Note: I now LOVE this kind of design and hope more DAC manufacturers embrace the idea that we consumers can do power supply upgrades very easily).

     

     

    So I began my evaluation of the Chord QuteHD DAC with less than exciting assumptions. My plan, as a huge DSD-aholic, was to test the Chord in all sample rates, but to spend most of my time on my new favorite thing, DSD files. I gave most of June to breaking the DAC in, as reports on this DAC were no different from most digital music equipment I had come across…that is, that although minimalist in design, the digital-to-analog signal path (as well as the power supply) needed plenty of time to settle in and perform its best. Secondly, I had other DACs in-house and wanted to get their sound signatures out of my system (literally and figuratively) before I went on to the Qute little thing.

     

     

    My first impressions were not anything to write home (CA) about. DSD file playback seemed a little polite, thin and at times almost too airy, with a slight artificial top end that seemed additive instead of the real byproduct of the recording. The upper treble was not bright, mind you, just artificial sounding, as if it was added post-production. It took one Thursday to change that…the day I realized that this DAC was powered by a 12V external power source; and that I owned a magnificent 12V external power source (Hynes SR3-12) that I legally stole for $190 from an unassuming web seller a year or two earlier. When I simply unplugged and replaced the Chord SMPS with the Hynes a transformation took place (well, after about 48 hours of the Hynes settling in…guess you can’t call that a transformation..more like a quickened evolution). Now those DSF files began to take on a much heftier weight, with the proper air that was deserving of the recording, not any more, not any less.

     

     

    rear-800.png

     

     

    It was after a very nice day at the golf course (small Laurie Anderson reference) in midsummer that my self-realization began (Hi my name is Ted, and I’m a DSD-aholic). I was listening to the QuteHD as I normally do, and threw on the 2012 remastered rip of Norah Jones’ Feels Like Home, a guilty pleasure favorite of mine back in its redbook days (although most reviewers seem to dislike it for its apparent sameness to Come Away With Me). As Sunrise began (not literally, I listen mostly at night) something was not right. The music had a tonality and organic wetness, especially the percussive blocks and country-flavored guitar work that I hadn’t heard before on this recording. ?? Did the DSD performance improve THAT much that it might have even surpassed my mighty Meitner? Did the Hynes addition make THAT much of difference to allow a now-$2300-investment ($1800 list Chord plus $500 list Hynes) to stand toe to toe with a true one-bit design worth 3X? Nope! Turns out I had accidentally chosen the HDtracks 24/192 PCM version (Greg Calibi remaster), a choice I never really liked before on the Meitner. And how did I realize this so easily? There was a warm dark blue glow from the Chord led light, signifying 24/192. (Note: from that day forward I positioned the Chord on my top shelf of the front rack, with its led light projecting onto my 110” acoustically inert video screen behind it. Why it’s acoustically inert is another story, but suffice it to say that a Jeff Hedback-designed 400 pound floating wall makes my screen, attached to it, NOT an issue in my stereo soundstage ☺ ). Anyway, I digress (duh!). The PCM NJ remaster was as good as I’ve ever heard it. I quickly changed to the DSD version (Kevin Gray remastered) and was startled to hear a much lesser musical versions, with that damn “politeness” coming back to haunt it. It wasn’t bad, but it was no way the incredible musical richness, the much more colorful presentation, the clear winner that the PCM version had become. Hmmmm. This was a wild discovery to me, someone who ate and slept DSD playback for these past 20 months. How could the PCM version kick the DSD version so badly, when the opposite occurred on my Meitner, and when these differences never showed themselves before? And now I began to wonder: which did I think was more musical, the DSD rip on the Meitner or the PCM one on the Chord? Although not the same remaster, I used this example to completely change the way I evaluated this little phaser thing. Maybe it was from the future after all? Certainly, at night, with the lights down almost to zero, those eerie LED effects swirled on my Stewart video screen, it now started to seem as though many of the off-the-wall (pun again intended) design choices were not so silly, and possibly the future of DAC design alternatives.

     

     

    I began to explore its PCM prowess more and more. Hell, like any good DSD-aholic, I had a boatload of DSD, but yet a hundred-fold boatloads of PCM. No contest when it came to absolute numbers, nor familiar recordings. And by the way, for those of you who have read along this far and concluded that I’m simply an idiot, let me tell you that I evaluated many DACS in both PCM and DSD. This Chord sound was something special indeed, and I’m not really sure why it took me so long to discover its potential prowess, but it began quickly shocking many who came over to hear it in its “wheelhouse”.

     

     

    Then the game changed for the final time (and added another month to my eval!!)….a number of folks on CA were testing the theory that regardless of a DACs USB interface the sound was markedly better when listening via the SPDIF or AES inputs (via USB converters). Jitter measurements often prove this out. Whether this was due to USB being a marketing add-on within the product life cycle of a given DAC manufacturer, or whether the USB interface (asynch or not) just add too many hurdles to overcome in certain DAC designs…dunno really. But curiosity (and a couple well documented UK QuteHD reviews claiming much lower jitter on the SPDIF) got the best of me and I finally gave it a try. The final justification was the interesting fact that the Chord QuteHD DAC could accept DoP (DSD over PCM protocol) via the SPDIF input, a feature not available on all DoP-capable DACS, and a feature Chord had not marketed at all (leading some CA posters to believe the capability didn’t exist).

     

     

    I had been very curious about the value-driven Chinese manufacturer, Matrix, who had a nice inexpensive SABRE-based X-SABRE DAC out for a few months, and while waiting for a possible demo I was lucky enough to have the pleasure of knowing Arthur Power, US distributor, who sent me their X-SPDIF (USB to SPDIF interface) XMOS-based $250 black box. I had tried it on a couple DACs and was impressed enough with the lateral move (i.e. no real loss) when used with expensive DACs…but nothing to write about really. I expected the same here.

     

     

    Clearly I am now an idiot, for I have had this black box sitting near the Chord for a few months, but they never got together for even a late night snack, let alone a serious sharing of electrons over a three day weekend. The requisite 48 hour settling in took place, then I sat down for what I assumed was going to be another lateral move. However, when music started it became clear (pun intended again) that the reduced jitter revealed itself in the most locked-down solid soundstage I had ever experienced in my music room. The most familiar (read: demo tracks heard literally thousands of times) music took on a slight but obvious increase in realism and they-are-here spatial cues that had me as excited about music as I’ve been in a long time. Here sat a $250 black box, talking to a $1799 DAC, powered by a $200 linear power supply…sounding like it could take on $30,000 DACs that I’ve only read about. Oh, and DoP via SPDIF is very real. ☺

     

     

    My curiosity could not be stopped. I had a dear friend/dealer who has Berkeley in his line, and was very open to let me listen to the other end of the USB-SPDIF spectrum, the vaunted Berkeley Alpha USB, priced about 6x the Matrix (although still not ridiculous in the scheme of things, especially given my reasonable math above). As many of you know, this USB interface changed the way many manufacturers look at USB implementations. It’s devil is in the minute details of isolation, parts synergy and even materials manufacturing. It is truly a game changer for this sub-sub-genre, and I was wondering if now the weak link would be my under-$2k Chord DAC. I mean, it was clearly built to a price point, and likely these improvements would come to an end. Well, sorta! Although the Berkeley did not perform 500% better than the Matrix, it was another obvious no-brainer that the Chord was meant to be used via SPDIF. The realism, timbres, harmonic decays and any other “they-are-here” aspects that allow us to be transported by music..those aspects were kicked up another notch by the Berkeley-Chord 3 day fling. However, the price tag was becoming a serious issue, with add-ons taking up 70% of the total cost.

     

     

    Suffice it to say that although the Berkeley clearly showed its stuff, I was more than pleased to find out the Matrix X-SPDIF $250 box was 90%+ of the experience, and much more in line with a reasonable upgrade path for buyers of a $1799 DAC. It’s great to know that should one find another grand or two in the cushions, Berkeley is a real musical option (but so is buying the wife a nice gift and then spending the rest on hundreds of hours of great music, knowing the home is once again at peace. ☺ ).

     

     

    Back to how this thing really sounds in the Brady music room. My comments are all based on a Matrix-Chord-Hynes setup, using an inexpensive out of date Stereovox HDV RCA-to-BNC digital cable. All the comments are relevant to USB direct input, too… just think “slightly veiled and slightly less accurate color, but still the best PCM you may have heard, until the Matrix experiment”.

     

     

    Ted-Red-200.pngTed-Green-200.pngTed-Blue-200.png

     

     

     

     

     

    The QuetHD’s little led is quite a nice feature, frankly, especially for someone like me who moves equipment around and dabbles too often in computer audio upgrades and changes. It is very useful to have immediate visual verification that the sample rate is correct, and that the handshake with the server/player has indeed taken place. 24 bit hirez playback produces a beautiful green, light blue or dark blue background, depending on sample rate. Most of us have a majority of our music recorded and ripped at 16/44.1k, aka redbook. The Chord QuteHD produces a warm red glow, both literally and figuratively. And for DSD, all the lights come on in a rainbow of colors; ironic in that the DSD performance is not nearly as colorful as that of its PCM side. Not plebeian at all, but the Chord PCM bar has been raised to something that only the Meitner can realize in DSD (in my DAC experiences). Horses for courses! What the hell do you want for $1799! ☺

     

     

    My demo listening rotation often consists of the same 30 or so albums, split nicely across all sample rates. And although my listening is usually done later at night in a room well isolated from the living and the sleeping, I often wonder if my wife thinks my music library has shrunk to an iPod size. Oh no, Gillian Welch again?? Well, with the QuteHD this phenomenon took quite a turn. I began with the usual 30, but found myself later playing the Alphabet game…. Tonight I begin with “A” and find three random albums beginning with that letter. Each night a new letter, each night a new re-discovery of musical gems lost in the terabytes. THIS is what this hobby is all about.

     

     

    The Gillian Welch reference above? Her Harrow And The Harvest 2011 release (16/44.1k) is my album of 2013 (I’m a little late on most things, not just this review). I can’t get it off my rotation, and when played through the Chord I am now likely to NEVER get it off my rotation. What’s even weirder? The genre is almost country (I said “almost”, and I hate country), as it borders on alt-bluegrass-minimalist folk-progressive Americana. Quite the oxymorons, huh? I am clearly having trouble categorizing it, and when the Chord allow all its natural acoustic guitar/mandolin color and wetness to ooze forth, combined with Gillian and Dave’s wonderful but sparce harmonies, the music takes on a comfort and familiarity that belies its 10 original songs. These sound like songs I’ve heard since childhood. Amazing album, really. Find it and the almost twin “Time(The Revelator)” from 2003, and let them wash over you a few times before potentially ignoring them as typical hippie bluegrass.

     

     

    Another wonderful redbook release is from a giant of the industry, yet the album is almost unknown. And it is simply the best recorded true rock album I know of. Through the Chord Keith Richards’ Main Offender sounds live, like your amps are his amps. The king of rhythm guitar never sounded so good, and the palpable buzz of the recording space comes through. Raw. Yes, his voice sucks, but so what..it’s raw like the simple chord progressions he has become acclaimed for. An offbeat Chord for offbeat chords? Makes sense. And yet the subtle colorations of the various guitars are easily recognized through this DAC, and makes the quite minimalist (there’s that word again) production work perfectly.

     

     

    Dynamics and harmonic decays? Well recorded live music, with normal logical spatial cues, is the best indicator. Again, we look to simple redbook (getting a hint that the QuteHD does redbook well enough??). The Live a’ Fip multi-disc release by the French jazz/world pop Hadouk Trio (with like four other guest musicians performing…trio?) has gobs of dynamics and spatial cues, and some of them will surprise you in their 16 bit authority. Hirez ain’t got nothin’ on this release. And the music is wonderful; a beautiful combination of world music, tight jazz and some instrumental pop thrown in. A recommendation of highest order, especially when played with full organic aplomb by the Chord.

     

     

    stack-3.pngIt’s probably obvious by now that the QuteHD excels in redbook, which is a good thing since most of us have 90%+ of our library (percentage of tracks, not storage) in good old 16 bit, even hirez junkies like me. But how does the DAC perform at 24 bit? Fine, thank you. One of my favorite examples of the benefits of 24 bit (regardless of sample rate) is Naim’s 24 bit download of bassist Charlie Haden’s duet with acoustic guitar master Antonio Forcione. The album is called Heartplay and its title is quite appropriate. The playful interaction between the two seems almost improvised, but perfectly timed to the very emotional music. The ultimate 2am-with-a-glass-of-red-wine album to close down a wonderful night of listening. The timbre of both beautiful acoustic instruments is captured like very few other recordings, and the subtle decays are what makes the interplay so engrossing. The Meitner is a fine PCM DAC, but for this recording it pales significantly compared to the much-less-$$ Chord QuteHD, a DAC that performs in PCM like no other in my recent memory. And I think it’s the natural decays in this recording that just cannot be captured in anything but an FPGA design. Horses for courses! Wow.

     

     

    Barry Diament, legendary recording engineer, is a frequent contributor on this and other forums, and his private Soundkeeper label is a tribute to his native 24/192 PCM recording prowess (he uses the Metric Halo ULN-8 to record and master direct to 24/192). Although one of the 30 in my eval rotation, his Markus Schwartz “Equinox” recording is more than simply demo material. The jazz/world percussion ensemble never sounded so good than through the QuteHD’s signal path. And it’s the subtleties in the masterful ringing and chimes and world harmonies, and especially the use of acoustic space; these subtleties are only evident upon serious listening, but they are the difference between listening to music and becoming engrossed in the performance.

     

     

    Another great engineer/recordist/entrepreneur is Todd Garfinkle of MA Recordings. I own much of Todd’s stuff, and have become friends with the man over these years. He has allowed me to collect some master copies of his recordings in various 24 sample rates, as well as DSD and DSD128 native masters. As good as the native DSD stuff is, the PCM native recordings are always the ones I choose when listening through the QuteHD (and yes, the DSD recordings are good, and are even better though the 1-bit Meitner, but I’m not sure his PCM projects via the Chord are any less amazing than the similar native DSD projects through the Meitner…tough call as the recordings are different of course. I will not comment on the same recordings converted, as that is not a fair fight either way). One track I love to demo is the 24/96 Nublado, from Sera Una Noche’s first self-titled album. I call this genre Tango-on-some-sort-of-tranquilizers (and that is not a putdown ☺ ). The micro-dynamics and unusual colors (created by acoustic instruments I’m not usually accustomed to) get me every time. I don’t like to put 10 minute tracks in an eval rotation, but this one is a special exception. No other DAC places me in this Argentinean church like the QuteHD.

     

     

    OK, so what does DSD sound like through the DSD-capable QuteHD. It sounds great, but not as great as the Meitner. It sounds a bit polite, comparatively, with 10% less palpability and with slightly more tension (DSD on the Meitner is completely effortless). But compared to other PCM DACs that claim DSD capability the Chord is a good-to-very-good DSD performer. It’s simply that the native PCM bar is SOO high here. DSD playback is second, period. Oh, and I have the luxury of knowing I can go 1-bit anytime I want. So, sue me. But regardless, the Chord QuteHD DAC plays everything, and in some cases plays it better than DACs costing 4X or more.

     

     

    The Chord QuetHD is my product of 2013

     

    It is the easiest recommendation I can make. The Chord QuetHD is my product of 2013 (even though it was released much earlier; like I said, I’m slow), and the Matrix-Chord-Hynes combo (combined street price under $2k) is the upgrade path of the century. Throw in another $1k or so (discounted) and you have the upgrade path of all time. Ok, hyperbole over…but you get the idea.

     

     

    Happy New year everyone. I’m starting the new year by wondering how damn good the updated Chord Qute HD-EX will be. Early reports are that it’s added 24/384k and DSD128 playback capability is not only a feature addition, but a sonic upgrade as well!! Some are saying the DSD performance has been significantly improved (which supports my claims of the QuteHD). And both of these DACs are in Chord’s value line, the Chordette. They are now introducing a smaller (really?) portable DAC for their reference line, called the Hugo. I will see it at CES. Maybe I can convince Jay and Katherine that I won’t keep this DAC for 6 months…. ☺ (c’mon Ted, just buy the damn thing). By the way, all this simply means two things: Chord knows their stuff, and used QuteHD’s from OCD audiophiles will be popping up! ☺

     

    02/13/14 Addendum:

     

    As promised I have obtained a Chord Qute EX (aka QEX) DAC. I will use this addendum space as a sort of diary to document a few things I discover along the way.

     

    First, the DAC is identical (except I got a black one this time) to the HD externally. Second, I never had to go through a break-in process with the HD as it was sent to me as a well-worn demo unit (which is good :) ). Third, I will try and separate the break-in roller coaster (and it usually is a r/c with some aspects of the sound getting better then worse) with what I feel are endemic to the base QEX performance, regardless of new vs broken in. (Note; for those of you who don't believe in break-in, sorry, you can skip through to several weeks from now).

     

    As you know this DAC has a new set of drivers (Windows and OSX, both ML and Mavericks) that support its new 24/352.8k, 24/384k and DSD128 playback (USB and digital ins; digital ins require the rare 384k-capable USB-SPDIF converter to hear the new sample rates). I posted elsewhere that I had issues with the Windows driver but that seems to be behind me now.

     

    The first big reaction to this DAC, new and cold, is that the USB input sounds slightly better than the coax input, which is conversely the case in the HD. Might be a break-in function...dunno yet. But I suspect that the HD's USB was truly a bug (jitter specs were too high) and the Chord folks caught it. It would not be something they would advertise, of course.

     

    Also, DSD64 performance is slightly better (not yet Meitner, but better) and inches closer to PCM performance than the HD gap.

     

    Stay tuned.... :)

     

    03/12/14 Addendum:

     

    Chord has announced a new Mac Mavericks driver for use with both the Qute series DACS (HD and EX) Thanks to coolhand for the heads up.

    http://www.chordelectronics.co.uk/news-info.asp?id=167

     

    As far as updates to my listening, the EX has considerable hours on it now and is producing lush wonderful music in both PCM and DSD. I am convinced the DSD side is better than the HD's was, with a bit more life and pop (which was needed). PCM has gotten more rich in timbre and continues to be detailed in a way that is both revealing yet still musical (I like toi say that we don't listen to music through a microscope). If the Hugo is that much better than this, well....I don't know..must be mind boggling :)

     

    The Hydra-X+ 384k/DSD128 capable USB/SPDIF converter is on its way for Friday (I have Fedex tracking). Stay tuned. Thanks.

     

     

     

    04/21/2014 Update can be found here -> http://www.computeraudiophile.com/content/576-chord-chordette-qute-ex-dac-update/

     

     

    1-Pixel.png

     

    Ted Brady

     

    CA Profile ex.png

     

     

    1-Pixel.png

     

     

     

    Product Information:

     

    • Product - Chord Electronics Ltd Chordette QuteHD DAC
    • Price - $1,795
    • Product Page - Link ex.png
    • Where To Buy - Link ex.png

     

     

    1-Pixel.png

     

     

     

    1-Pixel.png

     

     

     

     

     

     

     

    1-Pixel.png




    User Feedback

    Recommended Comments



    Richard,

    Thanks for the detailed foillow up review, as well as the full disclosure of your dealer status, etc.

     

    I am easily confused so bear with me: how do you surmise that you are powering the Hugo with a dc power supply when what I see is that you are simply powering your AP2. No power is getting through SPDIF connections, just a clean bitstream. Isn't the Hugo still being powered by its own battery?

    Ted

     

    Hi Ted,

     

    The USB cable coming from your computer normally carries a huge amount of RF noise into the USB port.

     

    By using an external USB power supply, we typically are able to run cleaner power into a DAC's USB port and and this will normally result in higher quality sound quality, but not with the Hugo.

     

    In the Hugo, the battery is supplying the power for the DAC and even though power is much cleaner than a cheap wall wart would supply, it too has its degree of noise remaining.

     

    Instead of trying to lower RF noise by working with the USB port (the Hugo doesn't gain any improvement by connecting an iFI iUSB or Teddy Pardo USB power supply), we can still gain a substantial sound quality increase by improving power through a good external +5VDC power supply and then passing it into our USB to SPIDF converter into its USB port.

     

    I've found the Audiophilleo AP2 converer to be perfect for this. It has two modules. One is the ARM RISC processor and USB interface and is powered by the computer. We connect here the clean power from the external +5VDC power supply instead of using our "noisier" power that is carried on the computer's USB power wires. Those wires are shunted with a resistor and the cleaner power now comes from the external power supply.

     

    Module 2 in the Audiophilleo has the ultra-low jitter clocks and S/PDIF output stage. These are also powered by the clean 5VDC external power supply.

     

    The +5VDC external power supply lowers the RF noise passing into the S/PIDF port and creates an analog-like smooth sound with even more detail since it can now rise to the surface rather than being covered over by the noise carried on the USB cable coming from the computer. The background becomes "blacker" and the sound stage and separation improves.

     

    You are correct. The battery supplies the power to the Hugo. However, what I'm doing is reducing RF noise by using the SPIDF port. This technique works really well for the Hugo and improves the sound quality beyond just using the HD USB port. It's interesting to discover that the various +5VDC power supplies that are available to us each sound very different. The power supply somehow carries with it an ability to fatten the sound while either covering over details or it can instead allow them to rise to the surface.

     

    I haven't figured out what is the exact cause of how well a power supply improves the sound but I have discovered that ones with a toroidal transformer sound the best. The iFi iUSB and the Audiophilleo PurePower don't sound as good as a Teddy Pardo supply for example. Of the three, only the Teddy uses a toroidal transformer with typical bridge, cap bank, and regulator circuit that we use in many other DC components. The iFi is powered by a wall wart and the PurePower is powered by a battery.

     

    I hope this helps. I definitely am not an expert in understanding what is going on here. Instead, I have enough experience using these components that I dig deeper to find out if I can use them to improve sound quality. The Hugo sounds really good using the custom transformer that I've been designing and improving step by step. It sounds much better than Teddy's commercial unit. I've just about got it perfected as much as I sense is possible. Sound quality is really nice and a perfect match for the Hugo. Much better than using the HD USB port.

     

    Richard

    Share this comment


    Link to comment
    Share on other sites

    Richard,

    I was reacting to the statement

    "In summary, I can share with you that the Chord Hugo, powered by a custom USB power supply, run through an Audiophilleo AP2 converter......."

    The Hugo is NOT powered by a custom USB power supply, it is powered by the battery. Unlike the Qutes of my review (which are using the Hynes) the Hugo has no external power alternatives.

     

    You went on to talk about reducing rf noise, etc...which is great. We've all been trying to reduce noise in a DAC, and things like the iFi USB (my first review way back when) are breakthrough products. I was simply pointing out that although you have found a nice clean source of 5V power for your external USB/SPDIF interface, it ain't powering the Hugo, it's simply letting less noise in (which is wonderful).

     

    By the way, I have another way that I'm doing a similar thing with the Qute EX (and hope to with a Hugo once I get my hands on one). I am using the JCAT USB card, which allows me to not use ANY power to the USB cable. I have the top port of the card powerless (and bottom port powered via a custom Acopian 5V) and use it for DACs that need no 5V (like the Chord). The combo of that card and then JCAT's own USB cable is quite something (mini-review coming). It has me thinking twice about whether the USB port on the EX is any worse than the SPDIF (those comparisons continue...will report back).

     

    Anyway...thanks for showing us how you are pushing cleaner music through the Hugo. :)

    Share this comment


    Link to comment
    Share on other sites

    Well, I think I'm gonna pull the trigger on a Hugo. They are unavailable as demos since they sell out at each shipment (note: this is the 3rd US shipment and it is confirmed that the RCA case enhancements have been delivered). I will put my name on one of the 4th shipments, due in a few weeks.

     

    I will put the Hugo through the same paces as the HD and EX. Anyway...stay tuned.

    Share this comment


    Link to comment
    Share on other sites

    Hahahahahaaha,

     

    I was waiting for this.

     

    I too like the concept of the Hugo...its a killer portable dac/headamp! I just need to sell my HD and move up.

     

    I dont need another desktop Dac, as the Lampis cant be beat for me as desktop Dacs.

    Share this comment


    Link to comment
    Share on other sites

     

    [snip ...] It has me thinking twice about whether the USB port on the EX is any worse than the SPDIF (those comparisons continue...will report back).

     

    Hi Ted .. FWIW I wondered about this regarding the QuteHD and reconfigured my system a month or so ago. Now it looks like this:

     

    Mac mini > iFi USB cable > iFi iUSBPower > Black Cat Silverstar! USB > QuteHD (w/Teddy Pardo PS) > ect.

     

    Subjectively speaking (of course), the SQ is fantastic and I now find a USB-SPDIF converter unnecessary. Of note, I replaced the iFi DH Gemini cable with the Black Cat and I prefer it. I like the simplicity and was reminded of what Barrows has often stated about properly done async USB .. we shouldn't need a converter. Definitely worth checking out.

    Share this comment


    Link to comment
    Share on other sites

    Melvin,

    good stuff. For me the HD was clearly improved going SPDIF (even with my inexpensive X-SPDIF) but the EX is less obvious so far. But maybe its the susceptibility to rf, cuz I now use powerless USB, and you now use a cleaner iFi USB signal path. Always learning...what a PITA. :)

    Share this comment


    Link to comment
    Share on other sites

    Guys, this is what Lukasz says about Power supply in Digital:

    As we know POWER IS EVERYTHING. We effectively listen to power supply modulated by the signal. So the power supply is even more important than the output stage circuit itself. Thats why 70 % of budget of the DAC goes to the power supply. It starts with selection of sections, how many points we need to supply and with what voltage and what amperage. In basic Level 3 DAC there is 10 sections, going up to 20 and more in Level 5. Every section has separate transformer winding so we must design custom transformers with many specialized windings. This is an expensive way of doing thinds but we believe it is the only way.

     

    For filtering we use different techniques, but lets focus on the most important supply - for the tube anodes. We use TUBE RECTIFIER, not silicon, even in DAC3 and in every higher level as well. after the tube rectifier we install capacitive output, followed by the big iron choke, followed by more capacitance and another choke. Yes, even lowest level 3 has CLCLC filter per tube. This technique is RIDICULOUSLY EXPENSIVE. Other companies use CRCRC which has three caps for 1 dollar and two resistors for 1 C each. Our approach is to use film capacitors instead of electrolytes and chokes for resistors and it cost 100 times more. That is our way of doing it.

    Share this comment


    Link to comment
    Share on other sites

    Norman, I love you, man...you just can't stop your Lampi love..I understand. But this is my Chord DAC thread, and you must have anticipated that I'd respond. As you know I had three (3) of Luckasz's DACs in my home, and all three threw so much DC into my signal path that I feared for my amps' life. They would shut down violently (thank goodness they shut down). I realize it's only my system (and likely other systems that are not dc coupled) and that the exact same DAC, sent on to Bruce, was found to be one of his all-time favorite DACs. Go figure.

     

    My point is that I could not sit still and hear about Lukasz's substantial design on this thread and not comment. Something he does (likely chipless design) is incompatible with my system. YMMV.

    Share this comment


    Link to comment
    Share on other sites

    I read this somewhere:

     

    Batteries vs Linear Power Supplies

    Batteries are low noise, right? That's why people want to use them in audio

    systems. Because they are pure DC they must have no AC noise, right?

    Therefor a battery is better than any other power supply. Not quite.

     

    How a battery produces power

    Batteries produce power through a chemical reaction. Every type of battery

    will have a slightly different chemical mixture that is used to generate power.

    Batteries have a voltage rating and a current/time rating called Amp-Hours.

    Amp hours basically say how many hours the battery will last if it's drawing

    one amp of current. Because many systems draw variable loads a 10Ah

    battery will not necessarily last 10 hours. It may last 20 or it may last 2 hours

    depending on the system it is connected to.

     

    A battery is pure DC. That means if you invert the battery's polarity you get a

    negative voltage. So a battery generally will produce a + voltage and we

    normally use - as ground to complete the circuit.

     

    As a battery drains the amount of chemical compound available to produce

    electricity drains. That means there's an exponential decay on the amount of

    power a battery can product. So a battery at 100% will have far more capability of producing fast transients than a battery at low charge.............................

     

    Enter the Linear Power Supply

    Linear power supplies are going to be larger than batteries. But unlike

    batteries they can be built to a much higher bandwidth that functions

    consistently. A well-designed linear power supply can be considerably lower

    noise, faster, and higher bandwidth than any battery. Linear power supplies

    can filter the incoming AC noise, eliminate ripple to exceptionally high

    frequencies, and have much higher slew rate and current output. This means

    their sound will always be consistent and their potential much greater.

    Comparing a battery to a SMPS or entry-level power supply will put a battery

    ahead as the clear winner. It will be much lower noise than a SMPS. But a

    well-crafted Linear power supply has several advantages and should be the

    only consideration when looking for the ultimate power solution.

    capability of producing fast transients than a battery at low charge.

    Share this comment


    Link to comment
    Share on other sites

    Norman, I love you, man...you just can't stop your Lampi love..I understand. But this is my Chord DAC thread, and you must have anticipated that I'd respond. As you know I had three (3) of Luckasz's DACs in my home, and all three threw so much DC into my signal path that I feared for my amps' life. They would shut down violently (thank goodness they shut down). I realize it's only my system (and likely other systems that are not dc coupled) and that the exact same DAC, sent on to Bruce, was found to be one of his all-time favorite DACs. Go figure.

     

    My point is that I could not sit still and hear about Lukasz's substantial design on this thread and not comment. Something he does (likely chipless design) is incompatible with my system. YMMV.

     

    Its not about Lampi, it about a series of opinions on Power Supply value in Digital. I had 3 takes and you unfortunately jumped in after point one. Something came up at work that delayed me posting the other 2 quickly. I am trying to create a train of thought that may explain why Richard gets better results the way he does.

     

    Dont forget I have a Chord Dac too ( for 15 months now, long before most here) and am interested in tweaks for it.

    Share this comment


    Link to comment
    Share on other sites

    PC Audio:

     

    The Power Supply

    Arguably the most important piece of the music server is the power

    supply. The bandwidth of the power supply directly correlates to

    the resulting sound of the system. Digital is impacted by much

    higher frequencies of noise than analog systems due to the concept

    of quantization error where frequencies above the clock rate are

    folded over into the base band and cause amplitude distortion on

    the square wave. While error correction and interpolation can

    estimate whether a one is a one or a zero a zero, it cannot correct

    the amplitude distortion on the square wave that gets imprinted on

    the file. Every process that runs on the computer takes power from

    the power supply (and any noise imprinted on it) and applies that

    voltage to create the new digital signal based on an algorithm. So

    where a faster CPU allows for less mistakes, the power supply

    prevents the CPU from coloring outside the lines. A power supply

    that generates noise or is too low bandwidth will do more harm

    than good in a computer--based audio system.

     

    Noise

    One of the biggest concerns with computer audio is being able to

    navigate all of the EMI radiated from the motherboard. But the

    EMI radiated from the motherboard is actually one of the lesser

    evils that plague computer audio systems.

    Noise is any signal we don’t want. Because we are playing back

    audio signals in the 20hz--20khz range anything outside of those

    realms can be considered noise. In digital audio there are clocking

    frequencies in the mhz range, which means that any frequencies

    above that are susceptible to fold--over and quantization error. This

    noise generates additional harmonics and data that doesn’t exist on

    the recording and imprints it on that signal.

    Noise is a voltage. This is why it’s generally measured in uV.

    While this may be a trivial voltage compared to the voltages

    running through an audio signal, when you have several uV being

    added every microsecond from different sources it adds up in a

    hurry. These uV add and subtract from the voltages on the digital

    signal so a 3.3V (one) becomes 3.2V or 3.4V or greater. This slight

    variation in noise doesn’t confuse the system away from thinking

    it’s a one, but that amplitude distortion and timing confusion gets

    imprinted on the digital signal and translates to added harmonics.

    Every digital signal contains timing information, amplitude

    information, and channel data. That information gets imprinted on

    the square wave that is then read by a computer. The imprint is

    created in spite of noise, which distorts that imprint that’s created.

    Noise comes from all places. It can be high frequency noise caused

    by wireless interaction, it can be light, vibration, heat, resistance,

    or any number of elements.

     

    Power Supply Noise

    The ATX--specification switchmode power supplies purchased

    with most modern computers are noisy monsters. Not only are

    switchmode power supplies limited in bandwidth by their

    switching frequencies, but the higher the switching frequency the

    more noise they generate.

    It is for this reason a linear power supply with a high bandwidth

    should be used. A HQ power supplies will have up to 18ghz

    bandwidth and have a slew rate of 5600V/uS. This means they

    have a very high bandwidth and are extremely fast. The additional

    speed allows them to react quickly to the transient demands of the

    computer system. The high bandwidth helps to eliminate fold--

    over and quantization error.

    The voltage from the power supply is used to create every signal in

    the audio system. So any high frequency noise or ripple directly

    relates to distortion created by every single algorithm and process

    run in the audio system. Every process takes

    voltage from the power supply and applies it regardless of whether

    it’s clean or dirty. The cleaner the better.

    Share this comment


    Link to comment
    Share on other sites

    Gang,

    When responding with a 3rd party diatribe, please just include the link. We can read it from there. If the link is not relevant (i.e important info needs to be edited out of a much more vast article) then reformat for this thread. It's only human nature but when someone sees a response that goes on for almost half a page (mainly due to poor formatting) many of us lose the essence of the post..as good as the info might be.

    Share this comment


    Link to comment
    Share on other sites

    Norman, you may already own a Chord dac, but when your response (now finding it was just part one of many) was 100% about the Lampi, and ended with "that is our way of doing it" I had to assume the post was ALL about the Lampi. Cuz it was. I (or any readers at the time) had no possible way of knowing it was just the first part of a lengthy educational post. I am sorry for that, but in hindsight maybe let us know where you are going.

    Share this comment


    Link to comment
    Share on other sites

    Work pressure… not as much time to edit properly as I was in and out all day, plus 2 of the 3 posts are NOT online….

     

    For me, when the info is good, format be damned, I make a printout and read at my leisure to digest the complex ideas.

    Share this comment


    Link to comment
    Share on other sites

    I read this somewhere:

     

    As a battery drains the amount of chemical compound available to produce electricity drains. That means there's an exponential decay on the amount of power a battery can product. So a battery at 100% will have far more capability of producing fast transients than a battery at low charge.

     

    Linear power supplies ... unlike batteries they can be built to a much higher bandwidth that functions consistently. A well-designed linear power supply can be considerably lower noise, faster, and higher bandwidth than any battery. Linear power supplies can filter the incoming AC noise, eliminate ripple to exceptionally high frequencies, and have much higher slew rate and current output. This means their sound will always be consistent and their potential much greater. Comparing a battery to a SMPS or entry-level power supply will put a battery ahead as the clear winner. It will be much lower noise than a SMPS. But a well-crafted Linear power supply has several advantages and should be the only consideration when looking for the ultimate power solution. capability of producing fast transients than a battery at low charge.

     

    I don't know where you read that, but I believe it is wrong.

     

    The only current surges in a DAC are those caused by digital logic transitions in response to every clock pulse. To minimize jitter, these surges must be suppressed by voltage regulators and capacitors mounted close to the DAC chip on the DAC circuit board, regardless of the type of power supply. The current draw from the power supply should be constant. There is no need for the power supply to supply "fast transients".

     

    It is true that a battery does not have a low output impedance at RF frequencies, but that also is a problem with the large electrolytics required to filter 50 or 60 Hz mains power in a linear AC power supply. In both cases, the solution is to add small value filter capacitors and/or high speed voltage regulators having low RF impedance.

    Share this comment


    Link to comment
    Share on other sites

    Great review Ted. I am too am a fan of MA recordings. Norman has been telling me quite a bit about the Hugo in our recent discussions as a dac option (in the context of our ongoing convo about the Directstream dac). He has been a Chord fan for longer than most inhabitants of this forum.

     

    Norman, which is your source of those quotes? I wonder who it is that propagated this apparently incorrect info?

     

    Bob, do you design or manufacture electronics or are you repeating what you yourself have read?

    Share this comment


    Link to comment
    Share on other sites

    I am using the JCAT USB card, which allows me to not use ANY power to the USB cable. I have the top port of the card powerless (and bottom port powered via a custom Acopian 5V) and use it for DACs that need no 5V (like the Chord). The combo of that card and then JCAT's own USB cable is quite something (mini-review coming). It has me thinking twice about whether the USB port on the EX is any worse than the SPDIF (those comparisons continue...will report back).

     

    The JCAT USB cable is creating quite a stir after PS Audio noted it made a big difference when used with their new DirectStream DAC. Sounds quite intriguing.

    Share this comment


    Link to comment
    Share on other sites

    Bob, do you design or manufacture electronics or are you repeating what you yourself have read?

     

    The latter, but my judgment as to what makes sense and what doesn't is strongly influenced by my degrees in electrical engineering.

     

    (We all know that many subjectivist audiophiles believe science is counterproductive to audio, so let's not turn every thread into a re-hash of that argument.)

    Share this comment


    Link to comment
    Share on other sites

    The latter, but my judgment as to what makes sense and what doesn't is strongly influenced by my degrees in electrical engineering.

     

    (We all know that many subjectivist audiophiles believe science is counterproductive to audio, so let's not turn every thread into a re-hash of that argument.)

     

    That is fair, but engineering is not necessarily synonymous with science. There is a lot of insufficient data in audio and science (IMO) involves an exploration to fill in those gaps.

    Share this comment


    Link to comment
    Share on other sites

    The JCAT USB cable is creating quite a stir after PS Audio noted it made a big difference when used with their new DirectStream DAC. Sounds quite intriguing.

     

    Interesting. What I gleaned from Ted's ramblings is that the Directstream was supposed to be more impervious to input typology?

    Share this comment


    Link to comment
    Share on other sites

    Ted Smith, not Ted Brady. :) I don't ramble. :)

     

    JK...Ted Smith knows his Sh$t. I wouldn't call it rambling...but I understand your point.

    Share this comment


    Link to comment
    Share on other sites

    wisnon is quoting from Core Audio Technologies' technical articles:

    Battery Power Supply | Battery vs Linear Power Supply | DAC Power Supply | Core Audio Technology

    Core Audio Technology | Articles and White Papers

     

    I read all of them when I was researching linear power supplies after reading this article.

    The articles seem impressive, but I do not have the background to know if the information in them is correct.

    Share this comment


    Link to comment
    Share on other sites

    Sorry to hi-jack this thread, but the QuteHD thread seems dead, and I could find nowhere else better to post this to.

     

    I am using Qute EX and JRiver 19 on Windows Server 2012 core. Whenever I press pause JRiver hangs and I have to reboot my music server. So, basically, I cannot pause. Has anyone noticed this behaviour? What did you do to overcome it?

     

    I had no such problem with QuteHD and JRiver 18. I upgraded to EX and bought JRiver 19 at around the same time, so I cannot judge whose fault this is, but I guess it's the new EX's drivers that cause it. There are newer updates of JRiver 19, but I haven't bothered installing them yet, since I am in core Windows mode, and I have to change shell.

     

    You can send me a pm if you think that this subject is out of scope for this thread. Thank you.

    Share this comment


    Link to comment
    Share on other sites

    Sounds like a JRIver install problem. I run exactly the same (but WS2012 in GUI mode on controlpc) and have zero issues (JRIver 19, Chord Qute EX). I'd take this up on the JRIver tips and techniques thread.

    Share this comment


    Link to comment
    Share on other sites

    Sounds like a JRIver install problem. I run exactly the same (but WS2012 in GUI mode on controlpc) and have zero issues (JRIver 19, Chord Qute EX). I'd take this up on the JRIver tips and techniques thread.

     

    Thanks for the reply. Which is your exact JRiver version number?

    Share this comment


    Link to comment
    Share on other sites




    Guest
    This is now closed for further comments




×
×
  • Create New...