With the LAB SlapBox, our goal was to create a well-rounded cabinet that would sound good while listening to different genres of music. The SlapBox is a driver-specific ported enclosure designed and optimized using a specific woofer’s T/S parameters. Construction of these boxes consist of solid 3/4” CNC-cut high-grade MDF (medium density fiberboard), precisely cut and assembled, then sealed using industrial grade sub-floor adhesive. Tuning frequencies vary among applications, but we generally tune our SlapBox between 32Hz-34Hz. Tuning in this frequency range provides a well balanced attack of SPL and SQ. You’ll get incredible output and sound quality, without sacrificing low-end extension. The SlapBox is available for a variety of sub applications. The name says it all. This enclosure really “Slaps”! Single 13½-inch vented woofer enclosure Designed and optimized for a single 13.5" JL Audio W6v2 sub (13W6v2-D4) 2.25 cu. ft. tuned @ 33Hz Constructed of 0.75" CNC-cut high-grade MDF High-grade automotive carpet Heavy-duty speaker terminal Made in California, U.S.A. Enclosure volume: 2.25 ft^3 (net internal) Peak tuning frequency: 33Hz Port size: 14.50" x 2.25" Sub cutout diameter: 12.5" (12-1/2") Dimensions: 30"W x 16"H x 15"D