Kicker CompRT Series Shallow-Mount 6 ¾" Subwoofer 48CWRT672The CompRT Thin Subwoofer is the ultimate mount anywhere bass solution. Less than four inches deep and capable of tremendously low bass, this weatherproof sub is at home on the trail, in the sand and on the road. The CompRT 6 3 4 Inch Subwoofer is an all weather thin subwoofer with a pair of 2 4 voice coils. CompRT Subwoofers have the thinnest possible mounting depths from the world's bass leader, thanks to the sub measuring under three inches deep,