When I got my sub10 subwoofer, I was giddy as a school girl. But, in June, I was horrified when my beautiful blue light was no more. I took it apart and there was nothing obvious. I called Klipsch and told them my sad tale and they said it would be $60 to get it fixed. I sent the amp off to Klipsch and waited with baited breathe. When I got it back, I had a constant hummmmmm. I called Klipsch and told them my story and they said they would send another amp. Third amp worked like a champ for two months and then the dreaded light went out. Three amps in a short time is too much to handle. I had the amp plugged into a surge protector. Do I need to get a power conditioner? I have a home that was built 5 years ago, I can't imagine what else I am doing to make my amps go so quickly. Please let me know if anyone has any suggestions.