This Q Power 15-Inch QBOMB15V Dual Vented Subwoofer Box Enclosure is designed and built for the deepest bass. It features a dual vented chamber design with a slot port in the middle and boasts 4.6 cubic feet of air space. The Q Power 15-Inch Q-Bomb subwoofer box is finished with a black bedliner spray for increased durability. Turn your ride into a sound machine with the help of the Q-Power 15-inch Subwoofer Enclosure! If you want the most output for your money, this is the way to go. "Q Bomb" is etched in the top of the box Dimensions (D x W x H): 18 x 38 x 16.25 inches