Yea i guess i really didn't word that right. lol. It is more like a humming noise.and the AVR is just a 2 ping plug. Like i said they are both plugged in the same power strip.So what do you mean by ground both of them? Again im not really good with all this my step dad hooked it all up for me and he isn't around anymore. So i appreciate you guys patience and help with me.