Down4Sound DOWN4SOUND PRO-FAB Birch Flat Pack Dual 2 6.5 | DIY Ported Subwoofer Enclosure Box

Description Warranty Information 1 Review Description Create your own high-performance subwoofer enclosure with the Down4Sound PRO-FAB Birch Flat Pack Dual 6.5 , a DIY ported sub box crafted for exceptional sound quality and custom car audio projects. Designed for dual 6.5-inch subwoofers, this kit features a precision-engineered ported design that delivers powerful, resonant bass. Made from durable birch wood, it combines strength and superior acoustics to ensure a premium listening experience. With pre-cut pieces and easy-to-follow instructions, the Down4Sound PRO-FAB Birch Flat Pack makes building your subwoofer enclosure straightforward and rewarding. Whether you're a car audio enthusiast or just love hands-on projects, this flat pack offers everything you need to customize your sound system. Key Features: Custom Dimensions : Space-efficient design measuring 28" Width x 13.5" Depth x 8" Height , ideal for compact installations. Precision Engineering : Pre-cut birch wood panels ensure a perfect fit and easy assembly. Ported Design : Tuned to 34 Hz for powerful, deep bass performance. High Power Handling : Terminal rated for up to 2500W , perfect for high-output systems. Dual 6.5-Inch Compatibility : Accommodates two 6.5-inch subwoofers for a secure and optimized fit. DIY Kit : Comes with all necessary pre-cut components and detailed instructions for a seamless assembly experience. Specifications: External Dimensions : 28" Width x 13.5" Depth x 8" Height Tuning Frequency : 34 Hz Cutout Size : 6 inches Material : High-quality birch wood Power Handling : Terminal rated for 2500W Assembly Required : DIY kit with easy-to-follow instructions 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 4 flat pack Posted by Unknown on Jan 28, 2026 nice box easy to put together speaker holes a little big but no problem. Don’t understand why people complained about no instructions. Very easy to put together. Great for the price. I wish you made a box for a single kicker 8” square speaker View All Close