SQL-Tuned 12” Single Sealed subwoofer enclosure designed for optimum bass response and low frequency reproduction. CNC Miter & Dado design and construction for the ultimate in airtight precision fit of all parts which ensures a rattle and noise free environment. Specially Formulated Aliphatic Wood Glue to ensure an airtight seal between all MDF parts with a second application of glue around all internal joints after final assembly. Pneumatic Applied Brad Nails to pull tight and hold the MDF parts during the glue drying process and help assure a no-leak, no-rattle air chamber. Enclosure Dimensions Subwoofer Mounting Depth: 9”, Sub Cut Out: 11.125”, Height: 13.88”, Width: 15.63”, Depth: 9.5”