High Current Outlet for Amps?

Multiple 20 amp circuits will do the job, yet I chose to install multiple 30 amp as it was not significantly more expensive. Higher gauge Romex and 30 amp circuit breakers are not significantly more expensive than the 20 amp stuff. Labor cost should be the same.

As for plugging your amp(s) directly into the wall, it depends on your particular conditioner. Let your ears be your guide.

Dave

This is going to depend on the efficiency of the speakers, SPL, and what operation class the amp uses.

One thing is clear tho -- a dedicated line is close to the last thing you want to do to improve SQ.  if you are doing a remodel anyway, then just go ahead - get bids for the different options first.

I had a 30 amp line put in for my system and use a PS Audio Premier Power Port for the receptacle.

As Dave said above, the cost difference between the 20 and 30 amp circuit is minimal.