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barrows

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  1. Both interconnects will matter. The important thing is to place the Sonore Attenuator, as close to the amp as possible (short interconnect). As this is a passive device, one wants it as close to the load (amp) as possible. Consider: If you are using attenuation, the interconnect from source to attenuator will have the higher voltage signal, so it will resist noise pickup more. Allow the source to drive the longer interconnect, and the Sonore Attenuator to drive the shortest interconnect possible.
  2. Perhaps... perhaps not. Only you can decide these things by testing yourself, as there are too many variables to predict the outcome. My own opinion is that SPDIF (and I2S) is generally speaking, a flawed interface by design, but some DACs sound better via SPDIF (usually because their USB input section is not implemented well enough). Using the ulraDigital will provide an additional layer of isolation from the Aurender to the DirectStream, which may, or may not, be a benefit. My own opinion would be that greater gains could be achieved using an optically isolated Ethernet Renderer, like the eopticalRendu or Signature Rendu SEoptical... But of course this is a Sonore forum!
  3. I would leave them on all of the time, I do with my stuff. Just unplug everything if you go away for a few days (or longer), and during sever lightning storms.
  4. Juilliard String Quartet were fantastic. ~500 seat theater, we were second row center, and it was acoustic only (no amplification). I guess one of the benefits of Classical Music being less than popular is the ability to see world class players up close with excellent sound... A bit sad though, considering JSQ is a top ranked ensemble.
  5. Juilliard Quartet, tonight in Loveland, CO. Going to have to deal with a snowstorm and some driving, oh well. Mozart, Britten, and Brahms.
  6. Well, that is a nice "concept". In practice how would this be achieved.. Anyone can suggest the concept, actual engineering of the USB interface is an entirely different thing. This is my point, @John Dyson's comment makes it sound like he believes DAC (and perhaps USB source) manufacturers are inept because the USB cable matters. I do not agree (at least not that all manufacturers are, there are some DACs with very well implemented USB receiver sections). In my view, it is not OK/fair for a lay person with no knowledge of such to call out manufacturers just because that lay person's personal view is that the USB cable should not matter, as they do not know what they are talking about. .
  7. As you seem to have some expertise in this area, please describe the details of how a properly designed piece of audio equipment would make all USB cables sound the same.
  8. This is the weird thing for me. For example, I see measured differences in jitter spectrum, where the differences are often at -120 and lower. And I agree that these differences Should not be audible, at least in what we see in the jitter measurements. I have participated in listening tests of different levels of jitter, say when just replacing the master XO with one of lower phase noise, where the measured jitter level differences are at such levels that one would conclude they Should be inaudible, but the differences are clearly audible. I have a very hard time believing that the difference which is heard is anything occurring below -120dB, as that does not make sense. Nevertheless, the difference is clearly audible, and does not require a microscopic focus to perceive. And the tests were confirmed with no knowledge of which XO was which, and were repeatable (essentially "blind" although I hate that term). I do not know how to explain where one needs to look to find the what is really affecting the sonic differences, I do not believe in magical qualities of audio playback. In my system, on a quiet night at home, I can perceive test tones at -100 and maybe -110, but not lower than that. So how can something at -120 or lower be affecting what I do hear? Is it possible for an artifact of jitter at -120 to be producing an IM product at an audible level? There is something there, but I admit to being not able to technically know what it is.
  9. I agree with this POV, when we are talking about a system as a whole. My point was, that the USB output of some products is many times cleaner than that of a standard computer, and some DACs have well implemented galvanic isolation of their USB receiver sections. When these two things are applied in the same system context, the differences between USB cables are less obvious, but still audible, sometimes. Certainly these differences are audible enough that I have spent considerable time auditing various USB cables. For example, if I use a standard computer (say a MacBook Pro) as the source in my system (keeping the rest of the context the same), the differences between USB cables are more acute than when I use the Sonore Signature Rendu SE. But certainly, a system with more resolute speakers, amp(s), etc will reveal more of the differences between USB cables.
  10. Wow! Really, as mentioned so many times before: no one is claiming there is any problem with losing data! That does not change the fact that different USB cables sound different. If you do not believe so, that is your opinion, but trying to convince people of such who knows better than you is a lost cause, a waste of your time, and mine. I would your posts if they actually had anything to offer, but they do not. You just keep stating your opinion, which is wrong according to my own direct experience testing such. I have no time for wrong opinions, they are just more noise. The proposed theory is that different levels of signal integrity give rise to different noise results in the USB receiver circuitry, and this noise makes its way to the important sections of the DAC circuitry (perhaps clock ground plane, perhaps analog stage, etc) where they create distortions/artifacts in the analog output. this is just a theory at this point, as an explanation for what many people actually hear. Again: Who has listened to the Curious Evolution cable, in an attempt to get back on track.
  11. I would suggest, why about it requiring USB power? All reports are that the upgrade sounds significantly better, I would suggest that one just be happy that Ayre has gone and provided a significant upgrade to a product which is not even offered any more. It is a rare company which does this. Using USB power, from a technical standpoint, is a good way to allow for a totally isolated USB input (as I am sure the QB-9/20 is), as it provides a power supply for the USB interface which is entirely isolated from eh rest of the DAC circuitry, without having to add an additional transformer in an already small case. Don't worry, be happy!
  12. So it shows worse performance via I2S vs. USB, as I would expect to see. I could see how say might suspect he differences to be low enough to be inaudible, but my experience comparing measured jitter levels with listening tests suggest that this would be audible. Just from this, I could see that some might find the I2S connection to produce a sound with slightly more body, albeit lower resolution. Some listeners might indeed prefer the I2S connection in a given system context... I know what I would think about it. Certainly there is nothing here that would confirm better performance for I2S vs. USB. Thanks Paul!
  13. All gear I am aware of benefits from warm up and becoming temperature stable. Clocks require warm up to operate at their best, most sold state circuits do not reach their set bias points without becoming temperature stable. Some of the voltage regulation circuits I use drift in output voltage with temperature, and need to reach a stable temperature to be producing the set output voltage. How long this takes depends on a lot of factors, amps with big heatsinks can take a long time to stabilize all that thermal mass. Class D amps, as they produce little heat, seem to take forever to warm up and reach their stable operating temperature. I leave everything on 24/7 so I can listen to music at is best anytime. But I use class D amps so I am not burning up much energy at idle. I used to have a Pass Labs amp, and it frustrated me that I had to give it at least on hour warm up to sound its best, but it idled at about 250 watts, so I was not willing to leave it on all the time.
  14. Definitely agreed here... I separate critical listening from listening for pleasure, as the above is what I am going for when listening for pleasure. I am no musician, but am about to purchase a NS Omni WAV Bass to fool around with (I have played a very little bit in the distant past)... this will allow my musician GF to make fun of me as well...
  15. Thanks Jussi. Yes the same measurement via I2S from a SingXer interface (or ultraDigital, etc) would be interesting to see for sake of this conversation.
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