THE WALL---Why?

I too have a power plant but prefer the wall for amps.  You will hurt nothing to try and see which way you prefer.  

Does your dealer sell the PS power plant?

They want to sell you some other line conditioner that they carry IMO!

Contact PS Audio for info on plugging in power amps.

PS Audio suggests plugging into the P10 power regenerator, even with big amplifiers. Give it a try.

My system sounded better when I plugged my amps into outlets on dedicated lines (each amp), rather than plugging the amps into conditioners.
I've tried several and it was the same. for low level components, it is a good idea, not only for conditioning purposes, but to help mitigate ground loop possibilities.
But, I've found that my system sounds better with the amps plugged directly into outlets via dedicated lines.

enjoy