The Amp panel gave out long ago. DefTech sent me three others, but they all had the same problem. So I ripped out the amp and use an external amp (M-200 from Outlaw - essentially the same amp as NHT used to use for their sub, I think).
Sounds better than new, but occasionally gets staticky at low volume. So I send it a test tone at max decibels and shake the house for a few seconds. It cleans out the cobwebs, I guess, and then it sounds fine again. Go figure.
How long should the driver cone last? I know I'm on borrowed time. Any suggestions what modern sub would be a good replacement when that time comes around? Deftech or ? Or another driver to stick in the PF15 cube?