I can verify the positive contribution a PS Audio P10 has made to my whole system (DAC, KGSShv, Plinius Power Amplifier, Mac Mini).
I noticed immediate were a cleaner background, less treble hash (digital edge) more bass power and extension, wider soundstage. Note the P10 took 4 weeks to burn in. It runs cool, looks good and is well built and has 3 years warranty. Forget the old Power Plants made in China, this is made in Boulder USA and is top notch.
Remember, all your devices are operating on AC then most cased converting that internally to DC to various voltages. In that process they have to try and remove voltage fluctuations, mains noise and mains distortion including sine wave inconsistency. A case in point, I used to hang around for the 2 am listening sessions late at night because they sounded better than during the day. Now I get a better sound ALL day.
I live in an apartment which may be poor mains, but it does have a big step down transformer at the entrance to the block so may be not so bad. I see 1.5% and up to 2.1% mains distortion incoming, and the voltage can vary from 228V up to 253V at anytime of the day. The P10 sorts it out and I now get 0.1% mains distortion, a perfect wave form and solid 230V output. You can vary the voltage on my unit. It also does Multi wave which sounds better through my system as opposed to Sine wave. You also get surge protection and cut off restart etc.
Need more info PM me.