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About Me

Found 3 results

  1. Highly regarded Denafrips Pontus R2R DAC in excellent condition. There are a few very small marks (see photos) that are only visible close up. Used in a smoke free environment in a dedicated headphone system. Only selling because I liked it so much I want to move up to a Terminator. Asking $950USD including shipping to continental U.S. or Canada New: $1625USD (with a 3-4 week wait) Buyer pays for additional insurance and/or PayPal fees (if used).
  2. I am at the point where DAC and Server are the most important things to upgrade up to the same level of my Preamp, amp and speakers, i have just tried the Bricasti M5 which worked as a streamer from my MacMini, although the sound improved it was just a notch, at the same time the M5 arrived also a pair of Tellurium Ultra Black XLR's which made the bigger improvement over the M5, go figure, so i returned the M5 cause i don't think 2,000 usd were worth the little extra improvement, the same thing happened when i put a Microrendu more than one year ago, with lesser speakers i never found an improvement over my Mac mini. So now by these findings i am guessing a better DAC would do the upgrade iam looking for and from there perhaps a server/streamer like the Zenith MKII or viceversa My actual server streamer is a Mac mini Server will be a Zenith MKII My actual DAC is the OPPO 205 I am interested on these DACS: Yggy VEGA G2 PS Junior DENAFRIPS Terminator So far price/performance wise, YGGY is the Schiit, but would going an extra 2,000 usd (aprox) over Yggy would worth to find a sound wise improvement with the other DACs mentioned here?
  3. Hi everyone, I am in the process of completing my audio chain setup. I've recently purchased a pair of Genelec 8040B studio monitors a few months ago and recently decided to upgrade my basic audio interface to a well regarded DAC. I've purchased the denafrips ARES DAC which is on the way and I'm in the amidst of researching how I can match all components including purchasing new cables. Questions at the bottom of the post. Due to the fact that the ARES has no built in pre-amp or attenuator I am in the hunt for most likely a passive Preamp with balanced Input/output placed immediately after the DAC. However given the technical specifications below particularly on impedance matching and the idea that the ARES outputs a relatively high output impendence, I am also open on the possibility of adding an active solid state pre-amp. Finally, from the research I've done, it may be that a passive preamp with a buffer integrated or added right before it may be the component I would need to convert a higher impedance signal and output a lower impedance signal. This is because I may have some impedance mismatching involved however I would like some feedback on that. The reason why I am slightly concerned is the general rule from what I've read across the web states that the input impedance of the power amplifier (in this case the built in amplifier in the studio monitors) should be roughly 10 times the output impedance of the source to ensure no roll-off in high frequencies or loss of dynamics. In the case of my active studio monitors, "the audio input is via a 10 kOhm balanced XLR connector", so I'm assuming that is of course the input impedance required to be matched right before the amplifier section. Here is my proposed chain in simplified terms: Razer Blade Laptop >> USB cable >> ARES DAC >> Solid State Buffer? >> Passive Pre-amp (balanced Input/Output) >> Genelec Active Studio Monitors From https://www.genelec.com/answers-library#qid-926 "I have no preamp outputs on my equipment. Can I connect my monitors to the speaker outputs of my power amplifier?" It seems the circuitry to the Genelec's amplifier is quite non-trivial as compared to a individual amplifier. In the answer, they advise to never connect a power amplifier output to the monitor as the input stage would be damaged, however it seems a typical passive pre-amp with an attenuator would be fine. Finally here are the specifications I am working with to ensure proper matching: ARES DAC Specs: Analog Output: XLR at 4.4Vrms +-10% (Peak voltage calculated to be 6.22 volts) Output Impedance of 1250 Ohms Genelec 8040B Spec: Crossover Section: 10 kOhm input impedance Input level for maximum short term output of 100 cB SPL @ 1 M: Adjustable +6 to -6 dBu Mains voltage:? 100,120, 220, or 230 V according to region - not exactly sure what this is. According to this paper: http://www.decware.com/paper55.htm In order to select an ideal preamp I must know 1. The output voltage of the source (DAC) which is 4.4Vrms 2. The input sensitivity of my amplifier - I am not sure what this is number is. From basic electronics, it seems like my DAC has adequate line stage voltage (should be at least 2V), and need to find he input sensitivity of the Genelecs expressed in volt, the Tortuga website mentions most amps have sufficient input sensitivity, so it maybe I don't need to amplify the signal twice. What Tortuga does mention is regards to problems with passive pre-amp is this: https://www.tortugaaudio.com/what-is-a-passive-preamplifier/ "Using a passive preamp between a high impendence source (ARES-1250 Ohms) and a low impedance source (Genelec - 10,000 Ohms) may overwhelm the ability of the source to drive audio signal without negative effects (dynamics and punch)." Lastly, they mention high capacitance of cables (in my case all XLR) is highly detrimental and can add considerable impedance to the audio signal so as to act as a low pass filter, rolling off higher frequencies which I don't want either. A high capacitance cable is of the order of 50 pF/ft while a low one is of 20 pF/ft. Questions I have are 1. Given, the parameters, what kind of attenuating section should I invest in, an active pre-amp or a passive pre-amp? Do the input and output impedances matter, and if they do, what ranges on input and output impedances do you recommend for the pre-amp. 2. How short do I need the upstream XLR cables to be, how short should the downstream cables be (running between the pre-amp and the speakers). 3. What are some good XLR cables with capacitance as low as 20 pF/ft you can suggest? 4. What are some good passive pre-amps if I need that type? 5. Do I need to invest in a buffer to ensure proper matching, what does the buffer look like and where can I purchase one? 6. Is the setup workable in the end without compromising my listening experience? The post is a little overboard with content, however I would like to be thorough for myself as well as others if they come across this. It would preferable in the end to not introduce any colorization (like tube pre-amps or buffers) and to keep it simple so as to pretend the original musical signal from the DAC is unaltered. Any technical input or subjective experience for a suggestion of components would be most helpful. Thanks.
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