AC Regenerator

I have a Torus AVR16 and very happy with it.

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 owned many generations of the PS Power Plants. They are well worth the money.   here is my review on the new P15.  https://www.psaudio.com/products/directstream-power-plant-15/#tab-reviewshttp://

Forgot to mention there are also a tubed linestage and tubed phonostage (both Aesthetix) connected to the regenerators.

@hifiman5 —Hi, I'm really curious. How did you determine that your power line THD = 1.7%? How did you measure this? What instrument(s)?
Please advise, and thanks for guidance.