I've had my NS-SB314 soundbar for about a year now. It worked fine for a while, but now it doesn't seem to be loud anymore. I have the volume literally all the way up, using an optical cable, bass enhance, and even when my AC kicks on in our apartment I can't hear any movie or show because it's so quiet. Its quieter than my TV volume. I have a Toshiba 50 inch TV. Can anyone tell me if this is just a problem with the soundbar wearing down or is there a problem?