I bought 2 Ultra X-12s for my home theater a little over a month ago.

Recently I noticed that one of the subs was not powering on. I narrowed the problem down to a blown fuse. After picking up some new fuses, I tried it again.

Any time I switch on the Master power switch, the fuse blows. I unplugged everything but the power cable, flipped the toggle switch to off, tried a different power cord, different power outlet... no matter what, once that master power switch is flipped, the fuse blows instantly.

Am I missing something? Is there something else I should try?