The QBGMC19212 is a custom-fit underseat subwoofer enclosure designed specifically for 2019 and newer Chevrolet Silverado and GMC Sierra Crew Cab trucks. Engineered for powerful low-frequency performance while maintaining factory interior space, this enclosure provides an OEM-style fit with strong bass output capability. Features & Benefits Custom-fit enclosure for 2019+ GM Crew Cab trucks Designed for dual 12-inch subwoofers Underseat installation design High-output ported enclosure Durable MDF construction Maximizes bass while preserving cabin space OEM-style appearance and fitment Automotive-grade black carpet finish Excellent for daily-driver and high-output audio systems Specifications Product Type: Vehicle-Specific Subwoofer Enclosure Model: QBGMC19212 Subwoofer Compatibility: Dual 12-inch subwoofers Enclosure Type: Ported Vehicle Fitment: 2019+ Chevrolet Silverado Crew Cab 2019+ GMC Sierra Crew Cab Mounting Location: Under rear seat Construction Material: MDF wood Finish: Black automotive carpet Mounting Depth: Approximately 6 inches Air Space: Approximately 1.5 cubic feet per chamber Port Tuning Frequency: Approximately 35Hz–38Hz Vehicle Compatibility Compatible with select: 2019+ Chevrolet Silverado 1500 Crew Cab 2019+ GMC Sierra 1500 Crew Cab Some HD applications may also fit depending on cab configuration Designed specifically for full 4-door crew cab models. Fitment may vary depending on factory storage options, Bose audio equipment, seat brackets, or aftermarket accessories