I believe the amp or subwoofer or possibly control pod on my promedia 5.1 ultras is starting to break. My system has been in use for only 2 years. What I hear coming from the speakers is something that sounds like a person shaking a metal bracelet or metal necklace. In fact, the first time I heard it was while I was watching a video lecture and I thought the guy lecturing had his mic to close to a bracelet :) . In addition to that, I can hear a fuzzy sparking type of sound coming from the amp. This sound coming from the amp still occurs after disconnecting all the speaker wires and input wires save for the control pod which one needs to turn it on. When I turn the system on, the usual "pop" that the speakers make sound louder now and higher in pitch.  The subwoofer sometimes completely cuts out and I'm left with just the satellites producing sound. I unscrewed the amp from the subwoofer enclosure and looked around, but I didn't see anything damaged. These noises I'm hearing are sporadic.

I have read about the incredible number of people who have had problems with the amp in this system, and I'm not sure what to do from here. If I do a repair with Klipsch, do they actually fix the design problems so that they won't happen again, or do they merely replace whatever pieces are broken with the same parts? 

As a side note, there is a terrible safety issue and design flaw with the control pod on the 5.1 ultras. On two occasions, the volume very quickly and automatically decided to jump way up. It goes up continuously and at a linear pace. By the time I got to the volume knob I thought my eardrums and the speakers would both blow (I was listening to music both times this happened). The volume knob on this system is very finnicky and I think it has something to do with that. You can change the volume by ever so slightly wiggling the knob, yet not increment the knob to the next notch.