I have a really weird problem. It seems like all my speakers are working, although there seems to be a little static through the subwoofer (it COULD be blown, but I doubt it). Anyways, they all work when the center channel is NOT plugged in. But for some reason, when the center channel is plugged in, all the other speakers stop working, and all sound comes out of the center channel. Not sure what could be happening here. If you need a specific model of the receiver let me know, as I said it's a Sony. Thank you in advance.