SPL

The SPL Boxes SB112VL-BL is a heavy-duty, single 12 in side-ported empty subwoofer enclosure designed to maximize bass response.

Engineered specifically for a custom fit behind the seat of 2004–2006 Chevy Silverado and GMC Sierra Non-HD Crew Cab trucks, this high-performance enclosure packs punchy, deep low-end audio without sacrificing your cabin space.

Upgrade your truck's audio without sacrificing valuable cabin real estate. The SPL Boxes SB114-212VBL is a premium, vehicle-specific subwoofer enclosure custom-engineered to fit seamlessly behind the rear seats of 2004–2006 Chevy Silverado and GMC Sierra Non-HD Crew Cab trucks.

The SPL Boxes SB115 is a heavy-duty, sealed single 15 in subwoofer enclosure designed to deliver tight, accurate, and distortion-free bass.

The SPL Boxes SB115V-KL is specifically engineered to handle the massive air displacement and unique physical footprint of a square 15 in driver.

The SPL Boxes SB122-212V-BL is a universal, heavy-duty downfiring 12 in subwoofer vented enclosure engineered specifically to fit behind the 3rd-row seats of full-size SUVs.

Transform your truck's audio with the SPL Boxes SB124-212BL Custom-Fit Dual 12 in Subwoofer Enclosure. Explicitly engineered for 2007–2026 Chevy Silverado and GMC Sierra Single Cab trucks, this space-saving powerhouse mounts securely behind your seat and fires forward to deliver hard-hitting, undistorted bass without stealing your legroom.

The SPL Boxes SB134-210BL is a premium, custom-fit dual 10 in down-firing sealed subwoofer enclosure engineered specifically for 2015–2026 Chevy Colorado and GMC Canyon Crew Cab pickup trucks.

This vehicle-specific dual 10 in subwoofer enclosure drops perfectly under the rear seat of your 2007–2013 Chevy Silverado or GMC Sierra Extended Cab, contouring seamlessly around the factory floor hump for a flawless, hidden fit.

The SPL Boxes SB142-212BL is a custom-fit, dual 12 in under-seat downfire subwoofer enclosure designed specifically for 2007–2013 Chevy Silverado and GMC Sierra Extended Cab trucks.

The SPL Boxes SB144-210BL is a custom-fit, dual 10 in underseat downward-firing subwoofer enclosure engineered specifically for 2014–2018 Chevrolet Silverado and GMC Sierra Double Cab trucks.

Upgrade your truck's audio experience with the SB144-212BL Custom-Fit Dual 12 in Subwoofer Enclosure. Specifically engineered to tuck seamlessly beneath the rear seat of 2014-Up Chevy Silverado and GMC Sierra Double Cab trucks, this premium enclosure delivers hard-hitting bass without sacrificing an inch of passenger legroom or cab space.

The SPL Boxes SB152-210BL is a custom-fit, downward-firing dual 10 in subwoofer enclosure designed specifically for 1999–2006 Chevy Silverado and GMC Sierra Extended Cab trucks.

The SPL Boxes SB152-212BL is a custom-fit, downward-firing dual 10 in subwoofer enclosure designed specifically for 1999–2006 Chevy Silverado and GMC Sierra Extended Cab trucks.

The SB182-210BL is designed to mount seamlessly under the rear seat of your 2007–2013 Chevy or GMC Crew Cab.

The SPL Boxes SB182-210VBL Subwoofer Enclosure is a vehicle-specific, dual 10 in vented subwoofer box engineered specifically to fit seamlessly under the rear seat of 2007–2013 Chevy Silverado and GMC Sierra Crew Cab trucks.

The SPL Boxes SB182-212BL Custom-fit Dual 12 in Sealed Subwoofer Enclosure is a vehicle-specific underseat audio solution designed for 2007–2013 Chevy Silverado and GMC Sierra 4-door Crew Cab trucks.

The SPL Boxes SB182-212VBL Subwoofer Enclosure is a vehicle-specific, dual 12 in vented subwoofer box engineered specifically to fit seamlessly under the rear seat of 2007–2013 Chevy Silverado and GMC Sierra Crew Cab trucks.

The SB184-210BL is designed to mount seamlessly under the rear seat of your 2014–2018 Chevy or GMC Crew Cab.

Upgrade your truck's audio experience with the SPL Boxes SB184-210VBL Vented Subwoofer Enclosure. Custom-engineered specifically for 2014-2018 Chevy Silverado and GMC Sierra Crew Cab trucks, this dual 10 in enclosure delivers hard-hitting, vehicle-specific bass without sacrificing valuable cab space.