Check the listing for details. TRU SPEC Prefab Single 15" Subwoofer Enclosure Sub Box Vented High Output. Condition: New. Listed at 224.99 USD. ***DUE TO THE CURRENT HIGH VOLUME OF HOLIDAY ORDERS, OUR LEAD TIMES ON TRU SPEC ENCLOSURES WILL HAVE TO TEMPORARILY BE INCREASED 14 DAYS (10 BUSINESS DAYS).***Every Tru Spec enclosure is computer designed, CNC cut, and assembled inhouse at GPcarAudio. This Tru Spec single 15" subwoofer enclosure is 3.0 cubic feet AFTER displacements including a displacement of 0.15 cuft per woofer. The internal volume and port area of this enclosure is versatile to most 15" subwoofers available on the market as long as your cutout is 14.2" or less, We do a 35hz tune which will give you a wide musical playable bandwidth while still being able to hit the lows nicely. This will Truly be one of the best sounding prefabs you will find.TRU SPEC PREFAB SINGLE 15" with double flush baffleMaterial: MDF TRUE SPEC PREFAB SINGLE 15” SUBWOOFER ENCLOSURE: Sundown SA15v2” Box External Dimensions Width × Height × Depth 30.00" × 16.50" × 17.22" Material Thickness 0.75" Net Internal Volume 3.00 ft3 Tuning Frequency 35 Hz Port Area 44.00 inch2 Cutout Diameter: 14.2"Flush Trim Diameter: 15.75"