My str-k670p's subwoofer is experiencing some problems. For some odd reason it just cut out while it was on I think for roughly less then an hour at about 50 out 70 volume. I tend to have it at that volume because it has the best clarity and power. It's either it's blown or something else. When it's blown doesn't it means that it still emits sound but very crappy sound. I took it apart and had a quick look at it though nothing really seemed to be wrong. The wires were all ok and the speaker itself looked practically perfect. So if anyone could help me out on this situation please do. I really need my subwoofer back.