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Single 12" Sealed MDF Subwoofer

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with warranty

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Arrives by Tuesday, Jan. 24 to zip 94107

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General Features:

  • Single Sealed 12" Enclosure
  • Internal box volume: 1.0 cubic ft
  • High Quality 3/4" MDF Construction
  • Durable black carpeting
  • Pre-lined with Poly-Fil
  • Seams are fully caulked for better efficiency
  • Gold post terminals for clean and easy wiring access
  • Box Dimensions: 14-1/4"L x 14-1/4"D x 14-1/4"H
  • 30 Day return policy


Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
Color of handle.

Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

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1 Star

Average Attribution Rating

Browse 7 questions and 52 answers
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Why did you choose this?
Sonic Electronix Store
Seemed like a good box for subwoofer based on the reviews.
Scott S on Jan 11, 2017
Because it's free and I needs it
Anna C on Nov 28, 2016
It came free with my sub so why not
VIcente E on Nov 30, 2016
amanda s on Nov 25, 2016
This Sealed Box..will work great with a Rockford P1S4-12?
Ej3235 on Apr 30, 2015
Belva MDFS12
Belva MDFS12
Rockford Fosgate P1S412
Rockford Fosgate P1S412
Best Answer: It's slightly larger than their "optimal" 1 cf spec., but this box will provide lower bass response. I prefer this and recommend it, but don't over-power the speaker. Use an amp with a power output of 200-250W RMS .
Reply · Report · Shamus J on Apr 30, 2015
· Add Answer · I Have This Question Too (2)
I have a Sony Xplod XS-L122P5. Will this box work?
A shopper on Jan 24, 2015
Best Answer: it should assuming its round. and not misshape
Reply · Report · Sean M on Jan 25, 2015
· Add Answer · I Have This Question Too (1)
What are the box demensions?
tom e on Feb 6, 2015
Best Answer: Box Dimensions: 14-1/4"L x 14-1/4"D x 14-1/4"H. Did you read the description? Do you any other dimensions?
Reply · Report · Derek V on Feb 7, 2015
· Add Answer · I Have This Question Too (1)
BRX1116.1D VS PPI P1000.1? Only powering 1 P3d4-12 in a sealed box. I like the idea of having headroom to not overwork the amp and for possibly going to two subs in the future (2 different subs rated to fit the output of the amp)
juanderful on Jun 3, 2016
Belva MDFS12
Belva MDFS12
Hifonics BRX1116.1D
Hifonics BRX1116.1D
Rockford Fosgate P3D4-12
Rockford Fosgate P3D4-12
Crunch P1000.1
Crunch P1000.1
Best Answer: I would go for the PPI unless the BRX has a specific feature you need for your setup. The PPI is rated for more power and has a cleaner signal to noise ratio. My PPI 900.4 and 1000.1 have been going strong for a few years being played every day. Make sure you have a clean signal going in and let the amp do its job. My audio philosophy is to save money on amps and fancy speakers and put more into a good signal processor and installation materials.. Good luck!
Reply · Report · Weston W on Jun 3, 2016
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Where are Belva subwoofer enclosures made?
A shopper on Feb 24, 2015
Best Answer: Thank you for the recent inquiry!

After researching this specific product, unfortunately we don't have the necessary information to assist you. Due to the limited information at our disposal, we're not in the position to provide you with the answer you're seeking. Therefore we invite you to contact the manufacturer directly for additional support. Since they have additional resources at their disposal, they're much better equipped to aid in your request.
Reply · Report · Customer SStaff on Feb 25, 2015
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is this box good for a boss cxx12?
Ely C on Sep 30, 2015
Belva MDFS12
Belva MDFS12
Boss CXX12
Boss CXX12
Best Answer: Yeah, that box should work out just fine.
Reply · Report · Seth WStaff on Oct 1, 2015
· Add Answer · I Have This Question Too (0)

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Single 12" Sealed MDF Subwoofer