4 - 12 inch DIY Subwoofer Box Flatpack Kit

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MSRP: $349.99
Now: $224.99
Was: $249.99
— You save $125.00

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TEAM 4 - 12 inch DIY Subwoofer Box Flatpack Kit

Precut for 4 - 12 inch subwoofers ported subwoofer enclosure made with DIY flat pack subwoofer kit and glue.  Adding 4 - 12 inch subwoofers should be a breeze because the MDF is a high strength, that's precut and predrilled. Not recommended for beginners as this assembly requires some skill. If you are needing one already assembled check out our 4 - 12 Ported Profab Enclosure

DIY Flatpack Subwoofer kit for 4 - 12 Subwoofer kit includes:

  • all the pieces to build a box, except terminal, glue, and screws
  • all pieces are pre-drilled
  • Team D4S logo top

Other Specifications on the 4 - 12 Flatpack Subwoofer Kit:

  • WxHxD: 40 inches x 18.75 inches x 28.5 inches
  • 7.66 cubes after displacement 
  • Tuning Frequency: 31 hz
  • Port Size WxHxD: 6.5 x 16.5 x 30.5 inches


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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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2 Reviews

  • 4

    Good deal

    Posted by Ben Davis on Mar 20, 2022

    Box came in. Put it together. Sounds pretty good so far. Would recommend if your just starting out or don't have free cash to buy a custom box. Worth the money

  • 4

    Flat pack enclosure

    Posted by Jorge Rendon on Feb 28, 2022

    This sounds amazing. Deep deep bass . My system so much louder. I love it. Only issue was the screw holes that were on the corners close to the edge was causing the wood to split. Eazy fix. But be careful. Other than that goes together eazy. And sounds amazing. I give it 4 stars because of the screw issue in the corners. I Didnt get my sticker tho..

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