I recently received a refurbished sub (ARS108PS)for a 10X9 room. I have made the jump to 5.0 recently and thought I'd try to add the .1 on a shoe-string, but I may have gotten burned. Like I said, this is my first sub and after about two hours of having it on, I'm not sure what's wrong. It is distorted (bottoming out?) on lots of stuff. Not all the time, but its very distracting. The sub's level isn't that high (about 12 o'clock) and I don't know what to do. Is it damaged? I've got it connected to the sub pre-out and set the volume level has been pretty low. Help.