I was driving along the other day, subs weren't loud when allof a sudden the sounds form the rear just faded. I at first thought it was a power issue but both amps and the cap are getting power. Ok, gotta be the cable. Well just came back from Radio shack with a new 20ft rca patch cable..... nada. I fear now that the low pass output is not working. Has anyone else had this problem ??? If so what is the fix ? PLEASE !!! I don't have the funds for a new unit and don't want to get rid of it.