, but I don't want to give up on RNHP
If you are not liking it, the power supply probably won't give a radical enough of a change to change that. My impression of the RNHP is that it is really accurate. It was made for audio engineering and it is mercilessly
precise like it says on the front in a really good way when the recording is really good and in a really bad way when something is off. It is not euphonic, but it is natural and great sounding. I really think that the RNHP with the stock PS is on a level where if you're hearing something that you don't like, the power supply isn't it.
The things that I have done to get the best from the RNHP:
-Using XLR. It's balanced which means it lowers the noise floor via cancelling deviations from the signal. It's also higher voltage. In my experience it's better than any connection by far.
-Building really good XLR interconnects. Mogami quad wire(EMF rejection via quadrupole cofiguration) and Neutrik connectors (equivalent to premade Mogami Gold cables) Completely black background. Turn the amp all the way to the max where I would never actually be able listen and NOTHING. SILENCE. No static, no EMF interference of any kind makes it through.
-Letting it warm up for a long time / leaving it on most of the time so that it's ready
-Gain staging. The potentiometer is not as linear to about 10 o' clock. The amplifier doesn't have a gain switch and my DAC has a pretty extreme output. I like to set the gain staging to where my average listening level is about noon. The stereo imaging is more stable and balanced. The really good interconnects make for a dead silent noise floor that helps the signal stay pure even where sending less signal through the lines.
-Learning what EQ I like, even if it departs what I would expect. But I keep it simple as to not go down a rabbit hole of obsessive tweaking. 2 bands on my LCD-X for me thanks.
As for software quality. I recommend ROON streaming qobuz with an ASIO driver at high latency. Don't use the Audeze presets if you use Audeze, they are implemented with impulse responses that degrades the signal and have some crossfeed. MUSE DSP EQ is pretty good.