I have 4 separate 20 amp lines going into my listening room. Everything is segregated and silent.
Was cheap as my best friend did the work for free and I fixed his wife's car.
As far as Millercarbon's comment about where to spend your money. If you have shite electrical service coming into your house then you will have shite sound with $5k spent on fuses, cables and pods.
Get the core right and the rest will fall into place.