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barrows

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  1. It has to be certified by Roon to work, this means a manufacturer has to make a product using it, and then go through the process with Roon, and then only that product will be Roon certified and work with Roon.
  2. I understand, as you are primarily concerned with OS to PCM, which is less demanding. My needs are for OS everything to DSD 256 with the EC modulators. I chose a i9-9900K for this, with its higher base clock rate, and because with the advent of the 10 series the prices came down on the 9900K. I am not concerned about having a silent machine, so no need for passive cooling for me, I have a fan based cooling system on my new machine build as the server is another part of the home and I use a Sonore Signature Rendu SEoptical as NAA. My Bricasti M3 loves DSD 256 input.
  3. i9-10900T appears to have a very low clock base frequency? Jussi has mentioned that a high clock base frequency is desirable for oversampling to DSD and using the EC modulators, and it would appear that the "T" version would not be the best choice for this?
  4. There is no reason that a linear power supply would perform better powering the Purifi amp modules. So far, the class D amps which have used linear power supplies for the output stages have proven to offer no better performance because of such, and in fact, the measured performance, especially noise, usually suffers due to magnetic coupling of the large power transformer required with the amplifiers output (see Stereophile measurements of the LKV Veros). Note that Chord makes their top level class A/B amplifiers using SMPS for just this reason, they actually produce a lower noise floor becau
  5. Well, we are of a different opinion here. As one who has actually worked in the industry for over 20 years now, visited countless dealers all over the country, listened to their showroom systems, listened to the in house demo systems of manufacturers such as Ayre Acoustics, PS audio, and Avalon Acoustics, as well as attended many CES shows, and RMAF shows, I am pretty sure I have a very good idea of "High End Sound", of many different stripes even. I am OK with you suggesting that you do not like the sound of this specific amplifier, you are entitled to your opinion. But when you sugges
  6. Sounds like you prefer highly distorted and colored sound, there is nothing wrong with that, as long as you are willing to admit it.
  7. Only with very expensive test gear. A very high speed 'scope for eye pattern testing, and a really good spectrum analyzer for testing the noise on the power and ground lines.
  8. I would suggest that this is not quite accurate, at least not IMO, but some of this depends on what one calls PCM and DSD. Typically, most DACs which one would say covert DSD to PCM, would end up converting a DSD data stream to a known PCM format, like 176.4 24 bit, or 352.8 24 bit, or perhaps 32 bit. The ESS chips do not do this, indeed they do not reduce the sample rate at all for DSD 64 input. The ESS chip does create a multi bit format out of DSD, at 5, 6, or 7 bits according to the settings of the chip: this is the bit rate the actual chip conversion stage runs at: this process is a re
  9. Yeah, that would be as expected. And yes, grounding the output of the LPS would then also ground the mini.
  10. Yes, of course, but that does not mean that you can break the ground connection from the computer source to the USB receiver, that is what I was asking. Do you make your own adapter cable for this, or use a commercially available one? I suspect that most commercially available USB breakout cables still keep the ground connection for the computer to the receiver intact, as this usually necessary for USB to work.
  11. I understand that the 5 VDC positive line is separated, but are you actually able to disconnect the USB ground and have the interface still operate, usually USB interfaces require a ground connection to the host to operate? In any case, i would still recommend grounding the mini to block the leakage currents and reduce the noise its SMPS injects back into the AC circuit.
  12. Have you ever tried grounding your Mac Mini? Are you sure the D10S is building up static, or could it be your body discharging static to the D10S? I like to ground my Mac Mini to stop its leakage currents from going anywhere. I made a simple ground cable with a USB A connector soldered to just the ground pin, which then goes to the same duplex outlet the Mini is plugged into (with an AC plug with just the ground wire terminated there). I have seen DACs lose lock before from people touching them here in Colorado where the dry air contributes to a lot of static problems. I have c
  13. As for speaker leads, the above comments indicate that it is a good idea to use speaker cables whose geometry rejects RF pick-up, such as properly implemented braided designs.
  14. I could help with some of those "conversions" if you need it!
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