I have two 12" Fosgate Punch subwoofers that just quit working. I hooked up
another box with a single alpine 12" to the amp and it works fine, so I
assume the amp head unit and wiring is working fine. The speakers have no
visual damage, I thought it was strange they both stopped working at the
same time, they were in installed in a box connected in parallel. During
troubleshooting I connect each speaker separately, still no sound. I suppose
it is possible that one went out some time ago, and I just did not notice
the difference. I am not very experience with car audio, I always thought a
blown speaker sounded really crappy but it still produced a sound, is it a
common failure to have no sound from speakers with no visual damage?