Check the listing for details. Custom Ported Sub Enclosure Box for 1 15" Orion HCCA - HCCA152 HCCA154 ~ WINDOW~. Condition: New. Listed at 399.95 USD. This listing is for a custom enclosure for a 15" Orion HCCA Sub. We use 4" aeroports to reduce port noise so you get nothing but clean clear bass from your sub. Also, the sub is recessed 3/4" into the box. We use an internal brace as well as a double top baffle. All joints are glued and screwed together to insure that the box will hold up against the high output of the subwoofer for as long as you need it to. Specifications: - Material: 3/4" Birch Plywood - 1.5" Top Baffle - Acrylic Window - 13" x 10" - 1/2" Plexiglass - Internal Brace - Port Tubes - 4" x 12" - Tuned to 35 Hz (adjustable by request) - Black Carpet (charcoal is carpet available by request) - Exterior Dimensions - - 34" Length - 16.5" Height - 19" Depth - 4.25 Cubic ft - Roughly 65 lbs - 1 Terminal included - Sealed air tight with liquid nails caulk