Tomslin

I find this thread quite interesting on the subject: https://www.audioasylum.com/forums/pcaudio/messages/17/177348.html

I haven't listened to it, unfortunately. There are at least some impressions in the TirNaHiFi thread I previously linked to: http://www.tirnahifi.org/forum/viewtopic.php?f=8&t=4652&start=10 Hard to say why they use regulators, only speculations without to ask himself. It can be related to commercial reasons or that they simply consider it better. Or maybe both.

Yes it does, here is one I know: https://www.ciunas.biz/new-welcome

Wow, Such a comprehensive forum thread. I haven't seen it before. The rest of the day dedicated to reading. Thank you!

Hi Alex Try to think little “outside the box” and leave the regulator issue there inside. I know that it’s possible to design a PSU without and still get a terrific sound quality. Even better in some cases 😁

Oh shit! I didn't think about that 😉

Yes, I agree to this. I am quite convinced that the LTO cells I use and Supercaps can meet these requirements. To bypassing any voltage regulators directly on the cards are probably not completely impossible, and possibly improve them if I should do something like that. But I have no intend to do it. Moreover the JCAT cards are already close to perfect in that aspects.

sorry for that, I'm not perfect at English 🙁

Yes, exactly.

I use my battery power supplys for max about a two, three hours at a time. I don't need longer listening sessions without break. I'm fully satisfied with that, and it had not been different if I had use AC mains power supplies. During such listening sessions I don’t experiences any weakness in terms of power fluctations or falling voltages. I am fully agree with yours statement that “a high quality battery supply (LiPo etc.) is normally better at preserving a neutral sounding presentation”. I noticed that already several years ago when I started using batteries. My setup sounds otherwise very neutral and it is also this neutral sound signature that I mainly strive for. At the beginning with my battery journey I use simple NiMH batteries for hand tools. Not sounding so good, but anyway more neutral than many others linear power supplys I had tried. Later I moved on to much better battery types, and the current I use is LTO. Regarding generated noise I can only say that the most of it disappeared when I changed battery types from LFP (LiFePO4) to LTO. But even more noise became reduced when I skip to use voltage regulators, you may believe it or not, it is actually true. Those LTO batteries I use now have a capacity of 40Ah, and internal resistance about 1mΩ. Short terms capacity to leave approx. 400A, and 40A over time is really not a serious problem. Those devices I use them for are USB card, NET Cards and CF to SATA adapters, mostly JCAT. And none of this devices have more current demands than max any single ampere, so when people talk about problems with fluctations at the power feed I take it quite easily. And the internal stability demands to each devices will also the internal regulators take care of. Thank you Marcin for theirs excellent design. When I so tried to use Ultracaps connected directly before the device, the SQ become undoubtedly better. Just here lies probably the biggest improvement. The tips I get from the TirNaHiFi site I linked to earlier. Very big thanks to jkeny and some others there for this. I will for sure continue to experiment with this in the future, and especially with the Ultracaps. For me is only the best possible sound quality the most important. I will gladly leave some I usually say “old truths” only for to achieve this goal, or at least come to close as possible. And I definitively not see it as an impossible task, actually not even hard. People who want to believe the opposite are welcome to do so, no problem for me 😊

Thank you for your clarification 😃 Although I don't quite agree with these "old truths". They allow certain grade of modification, imo. A hint for you can be; don't trust people who claim they know and understand better than you do 😉 Another link at the subject: http://www.tirnahifi.org/forum/viewtopic.php?f=8&t=4652

I do it simply because I experience improvements. May I ask if you have another experiences to this? 😊

Regarding batteries: Some Ultracaps as near the device as possible will be fine, feeding by batteries and no regulator. Post from yesterday: http://jplay.eu/forum/index.php?/topic/2350-jcat-net-card-femto/?p=48326

Yes it’s true. It's often these internal regulators determine the quality of a particular device. But a battery without a regulator can actually be better power supply for a device than the same with one. And provide better SQ. That's the difference I wanted to present.

It’s a generalization. “Batteries don’t supply a constant voltage”, yes. "Requirements for most circuits", yes, but for most devices, no. Therefore, most devices such as usb cards, ethernet cards, ddc, dac etc, can be powered with a voltage in a wider range than as stated as supply voltage. Batteries with voltages that falls within this range therefore work well without a regulator. The reason is that most devices already have built-in regulators, also applies to all motherboards.