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VEHICLE-SPECIFIC FIT: Custom designed for 2001-2006 Chevy/GMC Heavy Duty 1500/2500/3500HD trucks, this dual 10" sub box fits under the rear seat for seamless installation. SEALED DOWNFIRE DESIGN: Delivers tight, accurate bass response while saving cabin space, ideal for daily commutes, road trips, or tailgating. PREMIUM BUILD QUALITY: Constructed from 5/8" MDF with charcoal carpet for durability, reduced vibrations, and a clean factory look. OPTIMAL AUDIO SPECS: Provides 0.5 cu. ft. of air space per sub with 5.25" mounting depth and 9" cutout diameter for precise subwoofer fitment. FLEXIBLE COMPATIBILITY: Accommodates dual 10" subwoofers with 2 or 4-ohm setups, allowing you to customize your truck's sound system