Sealed Subwoofer - Our Accu-Tuned 12"" sealed subwoofer box is designed for optimum bass response and low frequency reproduction, which is ideal for lower profile sound quality subwoofers. Get more precise bass without starting an earthquake! Compatible With - Our woofer enclosure is designed and engineered specifically to be compatible with 2002-2018 Dodge Ram Quad Cab trucks for an OEM fit. A dual 15 inch subwoofer box will be too large and impede the operation of the back seat. Better Audio - Soft Polyfill Damping material helps create a flatter frequency, low bass extension, and simulates a larger volume of space. Unlike a ported 12 inch subwoofer box, a sealed 12 sub box will give you better sound that's not too loud. Airtight - Bbox uses special aliphatic wood glue to ensure an airtight seal between all MDF parts with a second application of glue around all internal joints after assembly. Make sure your Bbox 12 enclosure is loaded correctly for best results. Dimensions - Our Sub cut out is 11.125 inches and mounting depth is 6 inches high x 7.25 inches wide x 57 inches deep. Overall depth is 13.25 inches. Trust our dual subwoofer for better sound than a single 12 inch subwoofer box.