Just picked up a RF 12"4ohm and a RF T1500, already have 2 10" JL's, with good power, so to incorporate the RF 12, I'm gonna need to put in in a 1.25 single sub enclosure. My question is; will it be worth it in the back of a mustang behind the enclosure with the 2 10" JL's... will it be heard that far back? I need to have a custom box made to put all three subs in the same box, but that will be a while....