In wall AC cables

Honestly the normally recommended sizes is best. Having too low an impedance will encourage more noise going back and forth in the wires.

You may want to run a circuit for digital, and another for analog.

To get uber-fancy run a 220V 60 AMP line and dedicate 220->120 V transformers in the room. That's the fanciest with "normal" electricity.  The transformers will reduce line noise contaimination from inside and outside.

If instead you want to get fancy with re-generation PurePower and PS Audio are top tier, and Furman wiht LiFT and SMP (pro is cheaper) are a worthwhile value.

Best,


Erik

@cleeds

What exactly do you think is not allowed? 220V is an uncommon, but not illegal outlet type.

Circuit breakers are rated for current in two ways. What current they trip at (15A, 20A, etc.) and the maximum current which they can interrupt, called "Interrupt Rating." That is, if a short occurs, how much current could the breaker interrupt safely. This must take into account the size of the wiring and the transformer type all the way back to the transformer. However, usually this is taken care of by the panel or service breaker, and not the individual breakers themselves.

So, increasing the gauge of the cable used at the service entrance may in fact result in having to change the service or main breakers to have a greater interrupt rating, even if the trip current rating is the same.

Best,


Erik

There are other safety issues involved with overrating cables in that they may increase the minimum break current of circuit breakers.

Voltage drop should be negligible.

Now I think you misunderstood. First, 220V = 240V, really just about the same thing here. It will probably measure closer to 240 but we call it 220.  Second, residential service in the US usually IS 220 with a center tap, which gives the nominal 110V (Again, closer to 120V, it's just what we call it).  220 Service is often used for electric ranges, air conditioners, etc.

Secondly, I wasn't recommending he use 220 outlets, but that he run 220 service to a transformer ($200 - $500 ish) professionally installed in the room. This would give the least voltage drop and highest noise rejection possible.

None are really my preference, but if you want to get that fancy with room electricity that's my suggestion.

YMMV.

Best,


Erik