hey all,
I, like many others, experienced the failed sub woofer amp on my ProMedia 2.1 system. Sound came out of the sub but not the satellites. Since I had bought the system "new" but from an ebay crook (username "derek_althea"), my only choice was to send the system to Klipsch for repair. I removed the amp from the sub-woofer and sent it, and $40, to klipsch. I recieved the repaired item back after ~2 weeks. (pretty decent service, I think)
I was concerned about the significant heat that I could feel on the amp so I bought a heatsink (part # 567-557-140AB from mouser.com) and double-sided thermal tape (part # thr-31 from frozencpu.com). Check out the picture. I could immediately feel the heatsink heating up so I guess it's doing a good job!
I also have to admit that I was unsatisfied with the "loose" and "boomy" sound of the sub so I lined the interior of the subwoofer cabinet with foam to "tighten" up the bass sound. It might've made a small difference. Not too sure. I also figured this would increase the heat which is another reason for the heatsink upgrade.