Ok, I'm getting really frustrated with my subby and am just about to break something. Here's the dilemma. I have a Sony powered sub hooked into my Yamaha system which also runs a DVD, VCR, Playstation and CD player, everything is sweet there. However a problem has arisen since getting satellite/cable TV installed. I cannot use the sub with the cable, I can't even have it plugged in to the amp because the feedback is deafening. I have had the cable guy out and he says their equipment is fine, we have isolated the problem to the sub. Even when switched off the sub emits this awful feedback which also comes through the rest of the speakers so I have to unplug it completely. I know the problem is caused by the cable and the sub not getting along all peachey but surely there must be a solution to this? i have tried a different power outlet, different cables and tried plugging the cable tv in through any and all inputs but to no avail. Any ideas? Anyone?