Down4sound PRO-FAB 15 | 15 Sub Box | Single 15-Inch Ported Subwoofer Enclosure Box

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MSRP: $399.99
— You save $100.00



Down4sound PRO-FAB 15 | 15 Sub Box | Single 15-Inch Ported Subwoofer Enclosure Box 1-15:

Introducing the Down4sound PRO-FAB 15, the perfect 15 inch ported sub box solution for DEEP BASS music lovers looking for a top-of-the-line subwoofer enclosure box. Designed by Bassahaulic Productions, this single 15-inch ported subwoofer box is a force to be reckoned with.

Crafted from high-quality 0.75" MDF and finished with black bedliner, this 3.55 cube enclosure not only looks great but is also built to last. The plastic terminal cup and included plastic bag make installation a breeze, while the foam corners keep your subwoofer safe and secure. 

With a 32Hz tuning, the PRO-FAB 15 is optimized for low frequency response and can handle up to 3000w rated power, making it perfect for any Sundown audio subwoofer up to the U series. This enclosure is designed to bring out the best in your subwoofer, delivering powerful, clear, and distortion-free bass.

At 30 1/8th x 20 1/8th x 17 1/8th inches, the PRO-FAB 15 is the perfect size for any car trunk, delivering great sound quality without sacrificing space. However, please note that this box is not suitable for bigger subs, such as the X series, ZV5 series, and up. If you are planning to use a bigger sub, we highly recommend our custom hand-built heavy-duty enclosures for optimal performance.

  • 3.55 Cube
  • Single 15" Enclosure
  • 32Hz Tuning
  • .75" MDF
  • Subwoofer cutout - 13.75"
  • Mounting Depth -14"
  • Black Bedliner Finish
  • Plastic terminal Cup
  • Plastic Bag
  • Foam Corners
  • Double Wall Box Shipping Box
  • Good for up to 3000w Rated Power (Any higher power than this and we highly recommend you get one of our custom hand built heavy duty enclosures)
  • L x W x H: 30 1/8th x 20 1/8th x 17 1/8th

Recommended subwoofers for example are any more budget type of subs such as any Sundown audio subwoofer up to the U series.DO NOT USE THIS BOX FOR ANY BIGGER SUB THAN THAT SUCH AS THE X SERIES, ZV5 SERIES AND UP. IT WILL BREAK THE BOX.  Anything above that in size and you would want to purchase one of our custom one off (hand built to order) subwoofer boxes. 





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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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3 Reviews

  • 5

    15 inch box

    Posted by Lee on Jul 27, 2022

    I love this box. It’s sounds great with a 15 inch Sundown 1000 watt sub.

  • 5

    15 prefab

    Posted by Jeff on Mar 18, 2021

    Very nice quality made box! Happy with it, was going to use it just to get by until I had a box built and I think I'll just keep rocking this guy! Tune is great and it's a clean look!

  • 5

    Great box!

    Posted by Ty Sallis on Mar 05, 2021

    Very good box, have a Skar VXF15 in in hits nice and low. Only problem I’ve had is the terminals coming loose causing a spark and me to have to upgrade terminals

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