The SPL Boxes SB212SV-BL is a premium custom-fit dual 12-inch ported subwoofer enclosure engineered specifically for select Chevrolet and GMC crew cab trucks. Designed for powerful low-frequency output while maintaining factory interior functionality, this enclosure fits neatly under the rear seat and delivers deep, aggressive bass response without sacrificing cabin space. Constructed from durable MDF wood and finished in a rugged black carpet covering, the SB212SV-BL features a precision-tuned vented design optimized for high-output daily bass systems and truck audio builds. The enclosure is engineered for excellent low-end extension, clean airflow, and strong subwoofer performance in compact truck applications. Features Dual 12” custom-fit subwoofer enclosure Ported / vented enclosure design Under-seat truck fitment Designed for Chevy & GMC crew cab trucks Precision-tuned vented chambers Durable MDF construction Automotive-grade black carpet finish High-output bass performance Optimized airflow design Maintains usable cabin space Designed for clean stealth installations Built for daily bass systems Specifications Subwoofer Compatibility: Dual 12” Enclosure Type: Ported / Vented Material: MDF Wood Finish: Black Automotive Carpet Vehicle Compatibility: Select Chevy & GMC Crew Cab Trucks Installation Location: Under Rear Seat Mounting Style: Vehicle-Specific Custom Fit Included In The Box SB212SV-BL enclosure Terminal cup Installation documentation
