I have two L5 kicker 12's in the trunk right now, in kicker manufactured box, from the back seat floor boards, to the back of the trunk is dynomatted (cost a pretty penny) lol. Anyways, i'm selling these subs and box to a buddy, and i'm not sure on what to get next, i'm gonna get a Audiopipe 3000.1d , to start off anyways, what subs would go good with this amp? 12's 15's or an 18? I'm just looking to get max spl out of my car, any thoughts would be much appreciated. The back seat is removed already, should I just stick with something in the trunk? Or just have a box resting on the back seat with like 2 15's? Hit me up! Thanks!