i've unplugged washers, dryers, heaters, cable boxes, tv's, subwoofers etc.... pretty much eveything i own and no luck. i orderd the isolation transfer because it was only 10 bucks and figured what the hell. i was going to place it between the the splitt cable wire and my cable box unless you think i should place it on the main wire before the splitters. if that doesn't work i'll get the power conditioner and hope the filters in that unit work.