You can do a dedicated "ground" for your audio system so long as EVERYTHING connected to it is on the same ground. In other words, using a dedicated ground for just the amps and then having your sources, preamp, etc... tied into the common house ground WILL result in a hum and a possible safety hazard. Same thing goes for an audio system that does double duty as an HT system. If the TV, Satellite, DVD, etc... is tied into the house ground and the audio system is on a dedicated ground, once again, you've got problems. In other words, ANYTHING that is connected to the preamp or mode selector HAS to be tied to the same ground to work properly, minimize noise and be safe. Individual electrical codes may have a LOT more to say, so be careful and investigate first. Sean
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