i have two 12 inch Kenwood Excelon subs mounted in two truck box's screwed together with a powerful Clarion amp on the back.. box's came from Klean Kustomz and they did all the mounting work ect. they used to go behind the bench seat of a single cab chevy s10. small but a powerful thump. great price, need them gone taking up room, priced to sell 325 first come first get