The other thing that is interesting about dedicated lines, apart from their inability to isolate from the rest of the household system, given the common source of power and shared ground, is that if you have multiple dedicated lines they have different grounding potential. The UK crowd, I thought, advocated using a single outlet with a power distribution system, to maintain the same ground. I had the impression that Troy grounding system tried to accomplish this externally, by star grounding the various component chassis together- I never fully understood how this could work effectively if you are still grounding the components to the wall as well. (I have one of those Granite Audio 'ground zero' devices that is a far cheaper, and i'm sure far less effective, device than the Troy, but in some ways, the theory is the same). Grounding is an element of AC power that I find devilish in the extreme.Hi
When one runs a "dedicated line" how dedicated can it be? such a line has only "dedicated" to it its own breaker. Noise and the likes do get to the equipment courtesy of the common trunk it shares wit the rest of the household noice-producing items ... It is only a beginning. I prefer a generator as I have said countless of times... the Equi=Tech is a fine solution and so is a good isolation transformer of the proper rating .. Don't drop two class A 1000 Watts amp on a 2000 VA Isiolation tansformer and call it a day... then go complain that isolation transformers compress the sound ...
Also care should be taken to the return path for a ll thenoise aka ground.
As for many audiophiles PLC including the subject of this thread the less said the better ...