This listing is for a custom enclosure with two 1/2" plexiglass windows built specifically for 2 12" Subs.  We use a large 6"aeroport to reduce port noise so you get nothing but clean clear bass from your subs.  Also, the subs are recessed 3/4" into the box. All joints are glued and screwed together to insure that the box will hold up against the high output of the subwoofers for as long as you need it to. - Material: 3/4" Birch Plywood - Subwoofer is Recessed 3/4" - Port Tube - 6" x 13" - Plexiglass Windows - 9" x 9" - Tuned to 32 Hz (adjustable by request) - Black Carpet (charcoal carpet available by request) - Exterior Dimensions - - 34" Length - 16" Height - 20" Depth - Net Volume - 4.0 Cubic Ft - Roughly 50 lbs - 2 Terminals included - Sealed air tight with liquid nails caulk