Amps In Wall Or Conditioner?

Plug into the wall outlet.
@ghdprentice is referring to is a separate circuit or line for ll his audio equipment. I have done the same in my listening room back when I built my house 20 years ago. So there are no appliances, computer or other noise in the line. 

gdh means he is running a line directly from his panel to the amp without any switches or other outlets in the way. Good amplifiers already have a great power conditioner built in. It is called a power supply. It filters out all AC providing the amp with clean DC power. If you have to use power conditioning it is best to use it upstream on the low level equipment.
I do not use any of it anywhere. It seems to be a problem I do not have.

A direct line is a dedicated circuit from the breaker box. Your breaker box is 220v… so I would get one on each leg (they are typically next to each other in the box) one for the amp and one for the other components (power conditioner). The sub will not matter much… I doubt most people could tell the difference where you plug it in.

The direct lines for me cost less than any one interconnect or power cord, but resulted in greater improvements in sound. I have a really good system… the better system the more obvious the improvement.

Rather than ask, you can see for yourself what sounds best.

I have my Canary Mono Amps directly in the wall on a dedicated 20 amp line.  All other components including Pre-Amp on InaKustic 3500P PC.  I was told by my amp builder to not plug amps into a PC.