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BELVA

BELVA MDFD12 Dual 12-inch Car Subwoofer Box Sealed 3/4-inch MDF Prelined Polyfil

  • Based on 190 reviews
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Availability: In Stock.
Fulfilled by NVX® Direct
Arrives Sunday, Oct 18
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Size: Dual 12" Sealed (Black)


Features

  • High Quality MDF Construction has better density and consistency to always sound great
  • Gold post terminals for clean and easy wiring access
  • Box Dimensions: 28-1/2"L x 14-1/4"D x 14-1/4"H
  • Stylish durable black carpeting will look good on any type of car and prevent exterior scratches

Description

Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

Brand: BELVA


Connectivity Technology: wired


Audio Output Mode: Stereo


Mounting Type: bracket mount


Material: Wood, Fabric


Audio Output Mode: Stereo


Mounting Type: bracket mount


Enclosure Material: Wood, Fabric


Speaker Type: Subwoofer


Additional Features: Durable


Antenna Location: construction


Subwoofer Diameter: 12 inches


Color: Black


Is Waterproof: FALSE


Warranty Type: Limited


Control Method: Touch


Speaker Size: 12 inches


Woofer Diameter: 12 inches


Water Resistance Level: Not Water Resistant


Specific Uses For Product: dual subwoofer installations


Controller Type: Touchpad


Processor Count: 2


Connectivity Technology: wired


Wireless Technology: No Wireless Communication Technology


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: wired


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 inches


Number Of Circuits: 2


Brand: BELVA


Model Number: MDFD12


Model Name: mdfd12


Built-In Media: 2 x Subwoofer


Number of Items: 1


Customer Package Type: Standard Packaging


Series Number: 12


UPC: 818060010125


Manufacturer: Belva


Number of Audio Channels: 2


Item Dimensions D x W x H: 15"D x 30"W x 15"H


Compatible Devices: Laptop, MP3 Player, Smartphone


Compatible with Vehicle Type: Car


Power Source: Corded Electric


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Oct 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Solid box
Size: Dual 12" Sealed (Black)
This helped my subs hit deeper lows and came with some quality padding inside to allow extra extension. The separated chambers help each subwoofer claim its own space and would protect the other if any ever malfunctioned. Definitely recommend this box for anyone wanting to rock a good sized sealed enclosure. 12” subs fit perfect ... show more
Reviewed in the United States on July 5, 2026 by Amazon Customer
    • Great bass perfect size
Size: Dual 12" Sealed (Black)
Great product works great
Reviewed in the United States on July 16, 2026 by jason
    • Great product!
Size: Dual 12" Sealed (Black)
Got it for a friend and he loves it.
Reviewed in the United States on June 9, 2026 by Carinthia Reliford
    • Best prefab box I've seen in 25+ yrs
Size: Dual 12" Sealed (Black)
Almost perfect. Great value! Gotta say, this is possibly the 1st prefab box I've purchased that didn't require lots of work to make perfect. I didn't "need" to caulk the joints, as they were all pretty well glued, but I already had my caulking tube loaded up, so I sealed it extra tight to be safe. Two Infinity Kappa 1200Ws in this box sound FANTASTIC. The specs claim 1.23 cu ft per side, but the interior measures 12.5x12.5x12.5 (which comes out to 1.13 cu ft, almost PERFECT for the Kappa 1200w). Do note, the hole for a Kappa 1200w is slightly larger than standard, but I was able to fit the speakers with minimal effort and a little trimming of the holes. Overall appearance is TOP NOTCH, aside from the metal logo on the box. Would DEFINITELY recommend to anyone looking for a good prefab sealed enclosure. ... show more
Reviewed in the United States on May 19, 2021 by Neens
    • This box should cost more! It's truly exactly what I wanted and needed
Size: Dual 12" Sealed (Black)
I have two JL Audio 12W6 v3 subs. I had them in a ported box, but due to the variety of the music I listen to, the ported box was way too "boomy." It hit hard, but since no one masters tracks at similar balance and volumes, some tracks would sound really great, then another would have so much base, I was constantly adjusting the bass control on my Fosgate T1500.1. I mean the boom was strong enough to break my rear view mirror from the windshield three times, with the last time taking the glass with it. Enter the idea of a sealed box. While I get less vehicles shaking bass, I get considerably clearer thumps from the kick drums in metal, to a great clear boom from rap and hip hop. This box is very well constructed, the perfect size, packages really well, and arrived a week and a half earlier than projected. I got it in three days rather than the two weeks quoted. IF you want or need a nice compact box, and your subs need about 1.1 cubic feet of air space per sub, this is the box you need. With the displacement of the sub considered of course. Keep in mind, you do lose about 10Hz in the low end going to a sealed box, but boy it's made a world of a difference. ... show more
Reviewed in the United States on September 10, 2023 by TheRevenite
    • Works
Size: Dual 12" Sealed (Black)
Works as intended.
Reviewed in the United States on June 15, 2026 by Ahren C. Reinhardt
    • Good box
Size: Dual 12" Sealed (Black)
Mine did not come with any polyfil. The connections inside are cheap. The overall box build is nice and sq is good. Mine also arrived with a damaged corner but I’m not sending it back over these issues.
Reviewed in the United States on February 20, 2022 by M. Wood
    • GREAT QUALITY BOX AT A LOW PRICE!
Size: Dual 12" Sealed (Black)
I purchased the dual 12" sealed enclosure for my daughters Jeep Wrangler and installed 2 Rockford Fosgate P3 subwoofers in it. Powered by a Punch 1000x1d amp it sounded phenomenal! I was very surprised to see how well it was constructed. Built with 3/4 inch MDF all the way round, and lined with polyfilm. The carpet was nice and tight and seemed high quality. I use to build custom subwoofer boxes when I was a teen and have even been to some of the competitions in the IASCA circuit. This box is no joke, and if you can't build your own then I recommend this box, especially for the great price! ... show more
Reviewed in the United States on November 5, 2016 by John M.

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