this may sound stupid put i can't think of a better way to put it into words but, what is technically wrong with a blown subwoofer? i ordered a blown 10" type r off of ebay for a dollar and i hooked it up free air and it sounds and plays fine.
when i put my face close to it while it is playing it smells kinda funny but that's all that seems to be wrong with it
well i've heard somewhere that a blown sub will sound scratchy when you press on the cone and this one doesn't make that noise.
and i don't think that it sounds clappy or sounds bad on lows, becuase i was playing "beats for my van" aka the jackhammer song and it sounded fine. would that just be because it is free air?
i think i might of just made one he11 of a deal, lol.