Electrical and Grounding Needs

This would be my recommendation as long as you have an electrician coming in to do the work. First get a 220 volt line to run to the subpanel in the audio room (or adjacent room). At the end of the 220 volt line connect a toroidal transformer to step the voltage down to 110v. With the right wiring method this will give you 2 live poles of +/- 55 volts that are out of phase, thus canceling much of the inherent noise on the line (although there probably isn’t much after the isolation transformer). The problem here is finding a transformer large enough for your needs. I used one that was rated at 30 amps at 220 volts (6.5 kVa). That’s pretty high, and it may be difficult to find one at that rating. I’m still looking for some common sources for one that’s rated that high. The subpannel then gave me 4 separate circuits all independently filtered and grounded (one for the projector, one for amps, one for analog, and one for digital) I then use 10 gauge solid copper to the outlets which are all Hubble hospital grade. Hope that helps.