So I have a active subwoofer, and I plugged it into the receiver in the subwoofer position 1, and then 2 to double check. Yapo does not send a signal through it either. When I do manual set up I can turn subwoofer on, but when I play sound it does not come out of subwoofer. I am wondering if both subwoofer channels are dead? I set all speakers on small, turned up extra bass. Still nothing works... Any suggestions please?