Dual 12" Downfire Subwoofer Enclosure – Chevy Silverado / GMC Sierra (2007–2018)

Fits: Extended Cab / Double Cab (High Transmission Hump)

** heavy-Duty Bass. Zero Space Lost.**

Turn your truck into a concert hall without sacrificing your back seat. This Dual 12" Sealed Enclosure is custom-engineered to fit precisely under the rear seat of 2007–2018 Chevrolet Silverado and GMC Sierra Extended/Double Cab trucks.

Designed specifically for models with the "High Transmission" floor hump, this box contours perfectly to the floor of your cab. The down-firing design serves two purposes: it loads the subwoofers off the floor for increased bass output, and it keeps the woofer cones protected from kicking feet, loose tools, and cargo.

Finished in a premium Protective Spray Liner, this box is built as tough as your truck.

Why This Box?

• Perfect "High Trans" Fit: Unlike generic truck boxes that wobble or sit too high, this enclosure is cut to clear the transmission tunnel hump found in 2007-2018 Extended/Double cab models.

• Armor-Coated Finish: The rugged spray liner (bedliner style) is far superior to carpet for under-seat applications. It resists moisture from wet boots, won't peel or rip, and is easy to wipe clean.

• Stealth Downfire Design: By facing the subwoofers down, you get stealthy, hidden bass. The floor acts as a loading surface, naturally amplifying the low-end frequencies.

• Tight Sealed Bass: The sealed air chambers provide punchy, accurate, and responsive bass—perfect for rock, country, and pop music.

Technical Specifications