On my home theater system, which was working two days ago, I can't hear voices, only background music/sounds. I have checked the sound settings and all seems to be correct for surround speakers. I did s speaker check and it seems that my subwoofer and my center speaker are not functional. I have rechecked that the wires are in securely. I have switched the poles back and forth multiple times. I even put a new set of wires in my center speaker as i have a few extra. Any ideas as to why I still can't hear the voices? Thank you