Need some tech advice to salvage subwoofer

Yep.. like Granger says .. some voice coils are wired in such a way that you can power them with a 2 channel amp. 2 - 4ohm voice coils. Easier on the amp than a 2 ohm load. Its good to buy the amp and driver together to maximize the compatibility. I dont have a dual voice coil driver. Its something to consider though.
 
I get 1.5 cf, that is a little big for the driver I was thinking of.

I bet if you call PE or Madisound, Hey I got this box with this amp, looking for music, explosions, not so much. they will hook you right up

they're  tech guys, they live for this :)...John
 
It is certainly easier to reduce the volume of the box than to increase it.
 
I'm not sure if this makes a difference, but I have seen some dust caps that allow air flow, while others don't. It probably has something to do with a vented pole piece, point being replace like with like.
 
Cool thing about PE drivers - they give specs on each driver on cabinet size, ported/sealed or both, etc. Frequency response, efficiency, power handling etc. What was iinteresting for me, was that my HSU 12" sub that I bought many years ago (a round one) had a very efficient 12" that produced low bass (down to 20hz) very well, but broke up and got muddy in the 30hz range. I still use the same cabinet today, have cycled through several woofers in there. What I have 'settled' on is a good high power handling driver that goes 'low'. I havent measured it, but prob rolls off in the low 20's, but has good punch in the 30's for those transients that we all like. It wont rattle the window with pipe organ stuff.
 
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