The QBGMC1220144DR is a custom-fit ported downfire subwoofer enclosure designed specifically for 2014-2018 Chevrolet Silverado and GMC Sierra Crew Cab trucks. Built for high-output bass performance while maintaining factory cabin space, this enclosure delivers deep, powerful low-frequency response with a clean OEM-style appearance. Features & Benefits Custom-fit enclosure for 2014-2018 GM Crew Cab trucks Designed for dual 12-inch subwoofers Ported downfire enclosure configuration Underseat mounting design Heavy-duty MDF construction Durable spray-on bedliner finish Maximizes bass while preserving cabin functionality OEM-style fit and appearance Excellent for daily-driver and high-output systems Specifications Product Type: Vehicle-Specific Subwoofer Enclosure Model: QBGMC1220144DR Subwoofer Compatibility: Dual 12-inch subwoofers Enclosure Type: Ported / Downfire Vehicle Fitment: 2014-2018 Chevrolet Silverado Crew Cab 2014-2018 GMC Sierra Crew Cab Mounting Location: Under rear seat Construction Material: MDF wood Finish: Spray-on bedliner coating Air Space: Approximately 1.5 cubic feet per chamber Maximum Mounting Depth: Approximately 6 inches Port Tuning Frequency: Approximately 35Hz–38Hz Vehicle Compatibility Compatible with select: Chevrolet Silverado Crew Cab (2014-2018) GMC Sierra Crew Cab (2014-2018) Designed specifically for full 4-door Crew Cab models. Fitment may vary depending on factory storage trays, Bose audio systems, and seat bracket configurations.
