Forgot to mention that sometimes fuses are internal meaning you will have to remove the driver in most cases and inspect said amp. Otherwise, you may just have to remove the amp. It is kind of trial and error. Maybe give Mirage/Energy albeit the Klipsch Corporation a call and see if they can offer you some tips. I almost bet it is just a fuse. But, the amp could be fried too. Hope that is not the case. Best wishes!
Cheers,
Phil