AC Regenerator

Incoming THD is 2.0% at best and usually worse. In the past two years I made four upgrades: 1. PPP - biggest improvement, 2. Purist Audio Neptune interconnects between phono stage and integrated amp - second biggest, 3. Purist Audio Dominus RevB Ferox power cord for the amp - third biggest. But all three were quite big. I also got Tchernov Reference MK II interconnects that I use from phono to tape deck when I run the system like that, which is often. In this case Purist goes between deck and amp. In fact, in my system this arrangement gives overall the best sound from vinyl.

However, it still sounds better late in the evening than in the daytime. So, by audiophile standards PPP is not good enough. I'll probably upgrade to P5 or P10 at some point.

Clean power, regardless of how you accomplish it is to me the largest factor in a musical system. Put another way, the further up the line you improve the signal the greater effect you have throughout the system. I use balanced power throughout and it's great. I'm sure the PS Audio is great at this also. Reproducing music with dirty power is a compromise throughout. 

Aquired the most recent PS 15 Direcstream PowerPlant and repeat the previous messages.  Just sounds better all the time.  The newer 12, 15, and 20 are pricy but are more efficient, less heat, and bigger headroom.   With that all said my guess is their are some good deals to be had on the recent "older" generation 3, 5, and 10 PowerPlants.   I live in a condo complex with a lot of dirty power.   THD is going from 3.0% to .1%.