Ever since I moved a few months ago I can't figure out why the audio coming out of the center channel is muffled. It my old house everything sounded great. I moved into my new place, which is a little smaller and i j ust sounds too muffled. I swapped optical cables in case it was damaged moving and it did nothing, I swapped the speaker cable, and still nothing. Swapped the front and rear center to see and it's still the same. Could it be the receiver? The receiver is a Yamaha RXV730, and klipsch speakers. I don't see a reset button on the receiver, just in case I hit something that I am unaware of, but the receiver isn't a top of the line one with lots of settings, so I don't know. I moved everything myself, so I know the receiver didn't get dropped or anything. If it is the receiver, is it fixable because right now I am not in a position to drop money on a new receiver. Thanks for the help guys.