Subwoofer Box by QPower: Built with high-quality enclosure that is built for the deepest bass, featuring a single vented chamber design that allows proper air flow High Quality Built: Subwoofer enclosure box is constructed with high quality 0.75-inch MDF wood that makes this speaker box stronger than any other import wood giving you a bang for your buck Simple and Efficient: Set-up and preparation made simple and more efficient, this subwoofer enclosure features a high quality spring loaded terminal for easy and secure wiring Sturdy 15 Inch Sub Box Construction: QPower 15 inch subwoofer enclosure is finished with a black bedliner spray that resists weather conditions and corrosion, ensuring durability and longevity of use Single Vented Subwoofer Box Specs: Mounting depth: 11 inches; Air Space: 3.85 cubic feet; Middle Slot Port: 3 inches wide and 15 inches tall; Dimensions: 32"W x 17"H x 17"D; Weight: 30 pounds