I was an early adopter of the PS Audio P300 and ended up with two of them because they made an astonishing sonic improvement in my source gear and preamp.. But they couldn't handle any power amp I owned (I know, these are supposed to sound better into the wall).
I have a TON of source gear -- 2 turntables, 3 R2R decks, CD/SACD player with separate tubed PS, cassette deck, tuner --and now have both a P10 and P5. I tried the power amps (845 SET monoblocks) directly into the wall for comparison. Nope. Sound better to me into the regenerators. I wouldn't be without them. Plus you get superb service and support from PSAudio.
I have a TON of source gear -- 2 turntables, 3 R2R decks, CD/SACD player with separate tubed PS, cassette deck, tuner --and now have both a P10 and P5. I tried the power amps (845 SET monoblocks) directly into the wall for comparison. Nope. Sound better to me into the regenerators. I wouldn't be without them. Plus you get superb service and support from PSAudio.