Down4Sound Down4Sound PRO-FAB - Birch - 4x 8-Inch Ported Subwoofer Enclosure – 07-13 Chevy/GM Crew Cab – 2.5-Inch Seat Lift Required

Description Warranty Information 1 Review Description Designed specifically for 2007-2013 Chevy/GM Crew Cab trucks, the Down4Sound PRO-FAB (Quad) enclosure is engineered to deliver ground-shaking bass. With four 8-inch subwoofer openings, this ported enclosure is built from premium birch wood and coated with a polyurethane bedliner for enhanced durability. Featuring a square air port design, it’s precision-tuned for powerful and accurate bass performance. This enclosure fits seamlessly under the seat but requires a 2.5-inch seat lift for proper installation. Compatibility: 2007-2013 Chevy/GM Crew Cab (Under Seat, 2.5-Inch Seat lift is required BUT IS NOT INCLUDED ) Configuration: Quad 8-inch subwoofer openings Material: Premium birch wood with polyurethane bedliner coating for extra durability Outside Dimensions: Width: 54 inches Front Height: 12.5 inches Rear Height: 11 inches Depth: 14.75 inches Net Airspace (After Displacements): 1.795 cubic feet Subwoofer Cutout: 7.32 inch Port Information: Type: Square air ports - DRIVERS & PASSENGER SIDE - 2 PORTS TOTAL Inner Surface Area: 12.18 square inches Depth: 9.91 inches (including cabinet thickness) Tuning Frequency: 40.06 Hz Recommended Subwoofer: Down4Sound DBz 8" Subwoofers ****ALL SALES ARE FINAL**** View All Close Warranty Information Warranty Information Your new Down4Sound product is covered by 1 limited warranty if purchased from Down4Sound or an authorized Down4Sound dealer. This warranty does not cover improper installation, accidental damage, misuse, abuse, improper wiring, operation of unit outside of listed specifications, or any product that has been modified or repaired by anyone other than Down4Sound. Your warranty covers defects in materials and/or workmanship ONLY and is not an insurance policy. The warranty only covers the original owner of the amplifier. All warranty returns must be accompanied by the original sales invoice or receipt. You must contact us to request an RMA number prior to sending any returns via the RMA request form on our websi te. You are responsible for the cost of shipping your product back to us for warranty examination. If your product is covered under warranty, shipping back to you will be at no charge to you – if your product is replaced/repaired outside of warranty you must pay for return shipping and repair bill prior returning of the product or if no defect is found you are required to pay for return shipping only. At the sole discretion of Down4Sound your product will be either repaired or replaced when it is being covered under warranty. In the event of shipping damage due to improper packaging on products being returned to Down4Sound the customer is liable for the cost of all damages, necessary repairs, or replacement. Be sure to properly pack your return! * Extended additional warranty purchased on amplifiers take in affect from the date of purchase and must also be stated on orginal sales invoice or receipt. Refund/Return Policy: https://www.down4soundshop.com/shipping-returns/ Down4Sound - Hours of Operation Monday 6am - 9pm PDT Tuesday 6am - 9pm PDT Wednesday 6am - 9pm PDT Thursday 6am - 9pm PDT Friday 6am - 9pm PDT Saturday 8am - 4pm PDT Sunday Closed View All Close 1 Review 5 4 8s American bass Godzilla yea. Posted by Mike Jones on Aug 29, 2025 For starters a big Thanx to JP and Fam for all everyone does. I purchased this box on the fact it could handle the Zillas and under the seat oh yea. The 2.5 seat lift did not clear so I purchased the 3.5 and still not soni c9mbined them for 6inch total lift and still not clearing. Im not complaining because the box is staying so the seat will not be safe for my 8 year old that loves your videos too, to be able to sit in the back. So just a heads up.to future purchasers pay attention to the measurements. This box still rocks and kills any 200 dollar box, JP 16.2 camo setup and ready to push, had everything but not the time to put together and install until today. Thanx again to all who support you and until my next purchase D4S for life. View All Close