Saturday nite, was driving with friends in DC, when one in the backseat asked me if my sub was out. i've never noticed the bass in the car being out or low and i don't ever recall blowing a speaker. i felt the sub while having the music up, and didn't feel any vibrations at all from it. no sound either. when i checked the sub and the amp from the trunk side, all the connections seemed to be fine. wondering if anyone might know what's up. when i'm driving or in the passenger seat, the sound seems perfectly fine. the other speakers don't have any problems with output.

thanks