KICKER CompRT 6.75" Ultra Thin Subwoofer - 4-Ohm [48CWRT674]CompRT 6. 75" Ultra Thin Subwoofer 4 Ohm The CompRT line of ultra thin subwoofers fits under your seat or behind your back bench with ease. Now even more efficient and sporting a slick, blacked out cone, the CompRT gives you all the bass in very little space! The CompRT 6 3 4 inch Subwoofer is an all weather thin sub with a pair of 4 Ohm voice coils. With a mounting depth of under three inches and plenty of power handling, this go anywhere sub is as