Shipping Estimate
USA
- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
For Your Every Summer RSVP, with Code: SUMMER15
Description
Quad 8" Ported Underseat Frontfiring MDF Subwoofer Enclosure (w/ Durable Bed Liner Finish) for 2007+ GMC/Chevy Crew Cab TrucksQuad 4 Hole 8" Ported Subwoofer Enclosure Box for 2007 Current GMC Chevy Crew Cab Bedliner Finish Take your truck's audio system to the absolute extreme with this custom fit, quad 8 inch ported subwoofer enclosure, engineered specifically to fit perfectly under the rear seat of 2007 to current GMC Sierra and Chevy Silverado Crew Cab trucks. Designed for bass enthusiasts who refuse to compromise on output, this massive four hole enclosure maximizes
Quad 4-Hole 8" Ported Subwoofer Enclosure Box for 2007-Current GMC/Chevy Crew Cab – Bedliner FinishTake your truck's audio system to the absolute extreme with this custom-fit, quad 8-inch ported subwoofer enclosure, engineered specifically to fit perfectly under the rear seat of 2007 to current GMC Sierra and Chevy Silverado Crew Cab trucks. Designed for bass enthusiasts who refuse to compromise on output, this massive four-hole enclosure maximizes your available cabin space while delivering earth-shaking low end. Utilizing a highly efficient front-firing design and a precision-tuned slot port set at 35Hz, it ensures that your massive array of four 8-inch subwoofers delivers the absolute maximum punch and distortion-free volume possible from your truck's floorboard.
Built to withstand extreme acoustic pressure and the brutal physical demands of a high-output quad-subwoofer system, this enclosure is constructed from high-quality 5/8-inch Medium-Density Fiberboard (MDF) to eliminate power-robbing cabinet resonance. The exterior is completely coated in a heavy-duty, sprayed-on black bedliner finish, providing unmatched durability, moisture resistance, and a rugged aesthetic that seamlessly blends into your interior. Complete with premium spring-loaded push-pin terminals for a secure electrical connection, this box offers an incredible 11.25-inch mounting depth, easily accommodating heavy-duty, large-motor 8-inch subwoofers.
Key Features & Specifications
- Vehicle Fitment: Custom engineered to fit seamlessly under the rear seat of 2007-Current Chevy Silverado and GMC Sierra Crew Cab trucks
- Quad Subwoofer Fitment: Features four exact 8-inch cutouts to accommodate a massive quad 8" subwoofer array
- Enclosure Type: Ported / Vented design engineered for maximum SPL and deep, heavy bass output
- Tuning Frequency: Precision slot port tuned at 35 Hz for hard-hitting, distortion-free low end
- Air Space: 0.80 Cubic Feet of internal volume per subwoofer (3.20 cu. ft. total internal volume)
- Maximum Mounting Depth: 11.25 inches — offers massive clearance for heavy-duty, deep-motor subwoofers
- Premium Construction: Built from rigid 5/8-inch MDF (Medium-Density Fiberboard) to prevent rattling and structural flex under extreme pressure
- Heavy-Duty Finish: Fully coated in a rugged, sprayed-on black bedliner finish for extreme durability, anti-slip grip, and moisture protection
- Wiring Terminals: Equipped with high-quality spring-loaded push-pin terminals for a secure and reliable connection to your amplifier
- Firing Direction: Under-seat Front-Fire design maximizes acoustic transfer directly into the cabin
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 317 reviews
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Product Reviews
★★★★★ 5
Great product
Color: Black, Size: 4 Panel-88''
Literally exactly what I was needing
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Reviewed in the United States on May 1, 2026
★★★★★ 5
It's good...
Color: Black, Size: 4 Panel-88'', Color: Black, Size: 4 Panel-88''
It's good....took about 45 minutes to put together. No issues. Looks great...made the wife happy....
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Durable non see through fabric
Color: Black, Size: 4 Panel-88'', Color: Black, Size: 4 Panel-88''
This room divider is exactly what I need. It is very durable and easy to move around. You can’t see through the fabric. I love it. My reason for purchasing this divider is to use as a divider and as a backdrop holder. And it serves both purposes perfectly. It looks much better in person than on camera. It did have the spots on one side on all of them but in a few days they went away. It foldaway and tucked away easily.
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Reviewed in the United States on December 14, 2025
★★★★★ 4
Great product
Color: Black, Size: 4 Panel-88''
Love the look of this after it’s put together. It’s pretty sturdy and the connecting clips allow you to shape it different if you need it to fit in a corner. We use this at work so it’s great for the space we use it in. A little hard to store because it doesn’t fold up nicely because of the feet on it but I’m happy with it overall.
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Reviewed in the United States on April 19, 2026
★★★★★ 3
Does its job
Color: Black, Size: 4 Panel-88''
For the price the quality is decent. The only thing I do not love is the panels are attached to each other with 3 plastic clips. Only 1 side of the panel is actually attached to wheels. The other side kind of sits on the bar and is held in place with those clips.
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Reviewed in the United States on May 12, 2026