Down4sound PRO-FAB 3 8 | 3 8 Sub Box | Triple 8-Inch Ported Subwoofer Enclosure Box

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  • Down4Sound 3 - 8 Team D4S PRO-FAB Ported Subwoofer Enclosure
  • Down4Sound 3 - 8 Team D4S PRO-FAB Ported Subwoofer Enclosure
  • Down4Sound 3 - 8 Team D4S PRO-FAB Ported Subwoofer Enclosure
MSRP: $649.99
— You save $260.00


Down4sound - Triple 8 inch Ported Sub box Enclosure (PROFAB BOX)

Experience Deep Bass Like Never Before

This Triple 8 Inch Sub Box Enclosure is made with premium materials and expert craftsmanship, ensuring that it will withstand the test of time and provide long-lasting performance. The sturdy Canadian MDF construction provides a solid foundation for your subwoofers, while the rugged exterior is built to endure even the harshest conditions.

Optimized for Maximum Bass Output 

Our PROFAB Triple 8 Inch Ported Sub Box is the perfect solution for anyone looking to take their car audio system to the next level. THE POWER OF 3 - 8 inch subwoofers cutouts that fits most of the high performance audio 8 inch subwoofers, you can enjoy an incredible bass YOU CRAVE that is both deep and powerful. The ported design ensures that you will be able to hear even the lowest notes with clarity, giving your music a rich and full sound. You can either install the subwoofers normally or invert them to show off your subwoofers.


Triple 8 inch PORTED prefab aka PROFAB specifications:

  • WxHxD: 30 inches x 12 inches x 20 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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