I managed to speak to a Rotel tech and he confirmed that due to the 3rd prong in the rb-1080, that more current was drawn and in part can cause speaker humm. He Also mentioned that ultimately , my Cable TV may be root cause... so I removed my TV cable from my television set and the humm disappeared. It appears that the problem is directly related to the cable television. The recommendation to resolve the humm was to purchase an isolation transformer. I'm not sure how expensive they are but my ultimate goal is to get rid my speakers of the humm at a minimal expense without sacrificing audio quality. Would the cheater plugs still work given the problem is with my cable TV? if so, would
this negate the effects of my after market power cords?
this negate the effects of my after market power cords?