Hey guys, I'm using a set of logitech z-5300e speakers and recently I've noticed buzzing from just one speaker out of the 5, but can't figure out whats wrong. When its running with no audio signal, it produces a soft buzz while the others are nearly silent regardless of volume level. The big problem is once in a while, the buzzing would suddenly become louder, but distorted, for about 5 seconds. It seems the problem is from the amp because only 1 output jack is affected, which is the rear right speaker jack; I swapped the speakers around too but it seems all of the speakers have the same problem from that same jack. I've also switched to other inputs as well but the problem remains even with no input connected. Does anyone know whats wrong with it and how to fix it?