Hey what happened to (2) NS 15's? That would be louder, due to surface area. First one NS 18", then a second one(again 18). The car- maybe Toyota Celica T20. Subs on a wall. 34-35Hz. I've red that people play this babes with lots of power like 3000D or 3500D, but first I have to take care of the electric so there is lots of power and no clipping. Too bad I am from Bulgaria and shipping will be kind a hard... Small steps for a big build. I'll see if Jacob from SA can hook me up with something cheaper.