i have an re mt 18" sub that comes with dual .7 coils with american bass soft parts and an atomic apx dustcap. spider is glued and screwed down. this sub is way louder than my xxx18 in the same box and same amp, i just dont like running the amp at .35 ohms. if you put your head by the sub you can barely hear the sub making some kind of noise, but you cant tell otherwise. id like to trade it towards another xxx18 to match my other one, or anything really, just post some offers.