I just hooked up my h/k 240. When I change channels on the tv there's a pop noise coming from the left front and right rear speaker, kind of like the speaker cutting out each time. The rear is louder when changing channels. When I unhook the right rear the sound comes form the left front speaker. Can't figure this out, my other receiver did not do this. It's really annoying and cannot be good for the speakers. Anyone give me a hand on this?