Mojo: After hours of screwing around, the sub is set not to play vocals, or any mid-frequency stuff - all I get out is what sounds like muddy bass. And I don't know what else I can do, except bring it back.

Suggestions for a replacement for ~$500, or am I wasting my time for something in that price range? I wanted to start small, and see if I'm going to encounter the same experience I just had.

Eric G.