Re: Dirty AC and the theater
I do not have big bucks, so I went with the new PUREAV theater system. It is not meant to run your amps for long periods of time, but does provide line conditioning; surge protection; battery back up; and stage shut down of your components-the way you want them to be shut down(ie: projector last so the cooling fans will stay on). I also, have this plugged into a dedicated 20 amp line.
I have my main amp plugged into it's own 20 amp line and is not limited by a surge protector or any current limiting device. My smaller amps are plugged into the PUREAV. I'm not sure any reasonably priced conditioners exist for amps that are 3000 watts or more. Richard Gray may have products, but they will cost you and I'm not sure how long a battery back up would last running that kind of power.