From: Why doesnt my Q 12 work?

[lithium 358]

sounds like there's a failure somewhere in regards to the tinsel leads.... hard to believe considering the # of them in these things... I'd email Nick and let him know what's up, could be a cold solder joint, shit happens sometimes...

Will do.

As far as specs. Sub is in a ported 2.5 cuFT box, alpine mrd1000 amp with stock electrical system. Amp worked fine on replacement sub. Amp gain is all the way down. Ive only had the sub for 6 months or so.

did you pull the sub and check connection, and put a dmm on the coils?