Isolation Transformer

On the used market (Ebay) Xentech 5 KVA.

Acme, GE, Square-D.

Shielded is recommended but not essential. If it's going to be in living space, go for Q rated for no hum. For a few more bucks, consider providing balanced power but derate the output by half. Equitech's site has some useful info.

I would try the Topaz isolation transformers. They are reasonably priced and offer good shielding. However I would try using the transformer for the electronics, ie preamp, cd, turntable, as I feel you would get more benefit with the cleaner source for the more sensitive components. For the amps, I would just run dedicated circuits to allow for more current when needed.

Jordan721,
If you use a 5 KVA Isolation Transformer in-between your main panel and a sub-panel (like I do) then your amp should benefit from the clean AC on it’s own dedicated line and won’t be choked for power. I’ve tried it both ways and prefer the way my system is currently set up.