Compatible with Skar ZVX, EVL, and VXF subs This dual 15 in Heavy Hitters Vented enclosure is engineered for high - SPL performance USA made from 1 in MDF with aggressive internal bracing and optimized port tuning Proudly USA Built - Crafted in the USA with over 30 years of engineering experience, this enclosure is built for performance, durability, and precision Every unit reflects our commitment to American craftsmanship and quality Construction - Constructed entirely from 1 - inch MDF, this enclosure includes extensive internal bracing to handle even the most extreme SPL subwoofers Trick Glue bonds every panel with up to 3600 PSI of holding strength Precision Engineering - Designed using advanced CAD software and CNC - machined for tight tolerances Miter and dado joints maximize enclosure integrity while optimizing sound performance Performance Tuned - Each enclosure is built to exact specs for net volume, port area, and tuning - tailored for high - output, heavy - duty subwoofer systems Premium Finishing Touches - Wrapped in premium black carpet for a professional look and long - lasting durability