SINGLE 8 INCH VENTED SPL SUBWOOFER ENCLOSURE: The Bbox 8 inch single vented subwoofer box enclosure is designed for optimum bass response and low-frequency reproduction which is ideal for lower profile sound quality subwoofers. Get the most out of your vehicle's subwoofer with a truck sub enclosure designed for power and quality. SPECIAL FORMULA: We use Aliphatic wood glue on our 8" subwoofer enclosures to ensure an airtight seal between all MDF parts. Each 8 inch subwoofer box also gets a second application of glue around all internal joints after the final assembly. We use a CNC Miter to ensure an airtight fit for your powered subwoofer. Our Dado design and construction offers a precision fit for our car subwoofer boxes & enclosures, which ensures a rattle and noise free environment. HIGH GRADE MDF: Our subwoofer box enclosures are built with a durable & thick MDF for solid frequency response and accurate music reproduction. Our construction offers a precision fit for our car subwoofer boxes & enclosures, which ensures a rattle and noise free environment. 3/4” High Grade MDF Construction for Ultimate structural rigidity and no-flex construction. AIRTIGHT RECESSED SIDE PANELS: We use quality materials like our special aliphatic resin wood glue and brad nails from a pneumatic nail gun to create a tight hold on the MDF parts during the glue drying process to ensure that our subwoofer boxes have an airtight no-leak, no-rattle air chamber improving the overall sound quality of your sound system. ENCLOSURE DIMENSIONS: Since your subwoofer box or enclosure most likely goes into the boot of your car, checking their dimensions is highly important. Enclosure Dimensions Subwoofer Mounting Depth: 12.5”, Sub Cut Out: 7.125”, Height: 12.13”, Width: 15.13”, Depth: 15.13”