Check the listing for details. Custom Ported Sub Box Speake Enclosure for 2 12" DC Audio Level 4 / 5 Subs. Condition: New. Listed at 324.95 USD. This listing is for a custom ported enclosure for two 12" DC Audio Level 4 or 5 Subs. We use 3" aeroports to reduce port noise so you get nothing but clean clear bass from your subs. Also, the subs are recessed 1/2" into the box. All the joints are glued and screwed together & two 2" dowel braces are included to ensure that the box will hold up against the high output of the subwoofers for as long as you need it to. Enclosure Details: - 3/4" MDF Construction - Port Tubes - 3" Flared x 11" long - Black automotive carpet (charcoal carpet may be substituted upon request) - Tuned to 32 Hz. (adjustable by request) - Exterior Dimensions - 35"long x 15"tall x 14"deep - Volume - 3.0 Cubic Ft - Roughly 50 lbs - 2 Terminals included - Sealed air tight with liquid nails caulk