Its most likely your amp. Not your controller. Klipsch dont fix no more. They send you to Sybesma. They quoted me a flat rate of 150.00 to fix amp.. And that was a year ago. Someone here said recently they want 180.00 now. There'a a few people here that supposedly fix them. But their rates are high too.. In my opinion, you're better off buying a complete used system for about the same price either from ebay or Craigs list.,