the best information i can give is the hard-soldered connection that id been using for five years (was wired by a professional installer, i soldered it when i got home to make it permanent) inside my box from a dual voice coil sub to the terminal inside the box.....
i think the way it was done so was parallel because it was the only sub in the install and i was bridging my only amp to only power this sub. im pretty sure it was wired like this:
the connection suddenly failed (after 5 years of working properly) (no smoke or weird smell like it was blown) i have narrowed it down to absolutely no other option other than the sub.
i connected the bridged amp directly to the sub in several different ways (at an exceedingly low output) and listened for any sound to come out of the sub. the way that it is shown in the diagram conceived no output however, i want to say that perhaps the connecting the + and - from the amp to the two positive connections did (?)
assuming this information to be true......does this sound like i destroyed one of my voice coils, and perhaps the sub would still partially work if wired a different way? can a dual vc sub run on one voice coil?
biggest question i guess is "should i buy another one?"