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.
What cord are you using with the Elgar, I use a mongoose on the Haley and Hz on the Dmitri? I suspect you have a ground problem or an equipment malfunction, ear to box quiet are my units.
