Down4sound PRO-FAB 4 8 | 4 8 Sub Box | Quad 8-Inch Ported Subwoofer Enclosure Box

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  • Down4Sound 4 - 8 Team D4S PRO-FAB Ported Subwoofer Enclosure
  • Down4Sound 4 - 8 Team D4S PRO-FAB Ported Subwoofer Enclosure
  • Down4Sound 4 - 8 Team D4S PRO-FAB Ported Subwoofer Enclosure
MSRP: $799.99
— You save $370.00


Quad 8 Inch Ported Sub box Enclosure (4 - 8) Down4sound PRO-FAB 4 8:

Get ready to experience powerful bass like never before with the PROFAB Quad 8 Sub Box Enclosure from Down4sound. This quad 8 sub box comes ported and is expertly crafted with premium materials, this ported subwoofer box is optimized for maximum bass output and built to withstand even the toughest conditions.

With four 8 inch subwoofer cutouts, the Quad 8 Sub Box Enclosure is the perfect solution for anyone looking to take their car audio system to the next level. Whether you're a music enthusiast or simply want to upgrade your daily commute, this subwoofer box delivers the deep and powerful bass you crave.

Constructed from sturdy Canadian MDF, this PREFAB aka PROFAB box provides a solid foundation for your subwoofers, while its rugged exterior ensures long-lasting performance. The ported design ensures that you can hear even the lowest notes with crystal-clear clarity, providing a rich and full sound that will elevate your car audio system to new heights.

Measuring 32 inches x 16 inches x 25 inches, this quad 8 sub box provides 2.29 cubes after displacement, with a tuning frequency of 33 hz and a port size of 3 x 10.5 x 30.5 inches. You can either install the subwoofers normally or invert them to show off your high-end sound system.

Upgrade your car audio system today with the Quad 8 Sub Box Enclosure from Down4sound. With other 8 inch subwoofer box options, including single, dual, and triple ported enclosures, you can customize your car audio system to your exact specifications. Don't miss out on the ultimate in car audio performance - order now and take your car audio system to the next level with the Quad 8 Sub Box Enclosure.

Quad 8 ProFab Sub box Enclosure Specifications:

  • WxHxD: 32 inches x 16 inches x 25 inches
  • 2.29 cubes after displacement 
  • Tuning Frequency: 33 hz
  • Port Size WxHxD: 3 x 10.5 x 30.5 inches
  • Cutout 7.36" 

OTHER 8 inch subwoofer boxes available:


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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 website. 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:


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
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