Little variation over an old theme "a cheater plug really dangerous"?? Because here, if I put a cheater plug on my amp power cord AND plugging it in my Monster HTS-3500, I get rid of a nasty hum. If I'm plug in the HTS-3500, then the amp is grounded by the powerbar ground, no?? because the bar has 3 prongs?? And I never touch this amp, because it open by itself with a 12v trigger from pre-amp... So where is the danger in my set-up??