thanks all. i am addressing the issue in a few different ways. i have found where my cable t.v. coax is grounded and it is to my electrical box outside my house which is next to the cable companies box! i can't imagine that is good. so, i will have them remove it and ground somewhere else, preferably the same location as the electrical ground(i think is correct). i also know about the product by jensen suggested by audioholics.com. sounds good too. but the buzz/hum is evident, though softer, even when the cable coax isn't connected which lead me to think i may need to begin shopping for some true power conitioning. i dunoo, maybe just looking for an excuse to buy a toy??? :) but buying o A'gon one must be prepared to pounce when opportunity arises so i was looking at all avenues. i am running a quantum symphony for power purification but was thinking of adding something from richard grey at this new listening room. thanks again for the suggestions, any more would be greatly appreciated...d.