Down4Sound Down4Sound PRO-FAB - Birch - 4x 6.5-Inch Ported Subwoofer Enclosure – 99-07 Chevy/GMC Crew Cab – Behind Seat

Description Warranty Information 1 Review Description Designed specifically for 1999-2007 Chevy/GMC Crew Cab trucks, the Down4Sound PRO-FAB (Quad) enclosure is built to deliver exceptional bass performance. With four 6.5-inch subwoofer openings, this ported enclosure fits perfectly behind the rear seat , maximizing space while providing powerful and accurate bass output. Constructed from premium birch wood and coated with a durable polyurethane bedliner, this enclosure is built to last and handle high-performance demands. Compatibility: 1999-2007 Chevy/GMC Crew Cab (Behind the Rear Seat) Configuration: Quad 6.5-inch subwoofer openings Material: Premium birch wood with polyurethane bedliner coating for extra durability Outside Dimensions: Width: 56 inches Front Height: 22 inches Rear Height: 22 inches Depth: 8 inches Net Airspace (After Displacements): Internal volume provided in spec. Subwoofer Cutout: 5.51 Inch Port Information: Type: 1 x Square port Inner Surface Area: 12.18 square inches Depth: 9.64 inches (including cabinet thickness) Tuning Frequency: 34.38 Hz Recommended Subwoofer: MADE FOR MOST 6.5" 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 2 Close to being a good enclosure but needs a few revisions Posted by Chris on Feb 10, 2025 So I do not like leaving bad reviews but this box needs a few items to make it work. First issue is it does not fit, I had bevel the rear mid section to fit against the cab wall and this is after I removed everything including the padding. I did end up using sound deadening material and covered the complete wall and added 4 inch wide by 1/4 inch thick foam strips to help the vibrations & rattles. I did have to open the holes for the subs but I was aware that I would have to by the specs. Also the port is right up against panel and I will try to open up the panel on my truck to see if this helps. I would also suggest a few braces in the enclosure and not use a sub with a high surround as it sits right on the back of the seat. I did add spacers to the box to help with this but i'm sure if the seat gets moved forward it should help this. View All Close