Rockville RSVK12 Single 12" Vented Square Subwoofer Enclosure Proudly Made In The USA, Using Only The Finest Quality Materials - For The Best Level of Performance From Your Subs! Factory Matched To Work With 12" Kicker Solo-Baric L7 or L5 or L3, Hifonics square woofers, and other square woofers 3/4" USA Heavy Duty MDF Construction Machine precision cut mounting holes Top of the line Glue for extra durable adhesion High quality GOLD spring loaded terminals Designed, tested, and engineered to work with Kicker"s L7, L5, and L3 Square Woofers as well as many other square woofers on the market! Type of Enclosure: Vented Enclosure Sub Size: Single 12" Square Dimensions in Inches: 16.0" L x 18.0" W x 13.25 H" Top and Bottom Depth: 16.0" Mounting Depth: up to 14.5" (enough depth for any sub on the market) Tuning Frequency: 42 Hz Port Dimensions: 2" x 21" x 12" Gross Volume Per Sub (Measurement for the outer dimensions of the box): 1.50 Cubic Feet Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood and port): 1.22 Cubic Feet