i got a 15" L7 for cheap in a 4^3 ft. box tuned to 32 Hz off a friend. also got a HC1800 under the hood n a HC800 to go in the back. did the big 3 which was recommended by a friend. its goin in a 2001 expedition wit 3rd row removed. aint got much to spend right now. jus wanna get somethin that...