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Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

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

In Stock
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List price $89.99

$51.99

with warranty

You Save: $38.00 (42.23%)

Arrives by Thursday, July 31 to zip 20147

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In Stock

Arrives by Thu, July 31

Bundled Savings with this Product

Save 20% on a Trunk Sound Deadening Kit!

Get rid of the rattles and improve your ride! Save 20% on the Maxxlink VSD-TK Trunk Sound Deadening Kit when you purchase a select Subwoofer Enclosure. This offer is only good for a limited Time!

14.00

1583

640

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

$51.99

+

20% OFF

Maxxlink VSD-TK

$69.99

Special Price $55.99 ($69.99 if purchased separately)

Maxxlink VSD-TK

• Eliminates Road Noise
• Reduces Rattles
• Heat Insulation
• Five 18" x 32" Sections
• Butyl-Based Material

50% Off Speaker Wire with Purchase

Get 50% Off Belva 12 Gauge Speaker Wire when you purchase a Belva Subwoofer Enclosure. Simply Click the "Add Both to Cart" button to the right.

7.50

1583

401

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

$51.99

+

50% OFF

Belva BBSW127

$14.99

Special Price $7.49 ($14.99 if purchased separately)

Belva BBSW127

7 Meters • 12 Gauge Speaker Wire • High Strand Count for Maximum Flexibility • 23 Foot Length

(Offer 1 of 2)

Combined Total Price

$107.98

You Save $14.00

General Features:

  • Dual Sealed 12" Enclosure
  • Internal box volume: 2.46 cubic ft. total air space - 1.23 cubic ft. per chamber.
  • High Quality 3/4" MDF Construction
  • Durable black carpeting
  • Pre-lined with Poly-Fil
  • Seams are fully caulked for better efficiency
  • 2 Separate chambers allowing each subwoofer its own air space
  • 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
  • 30 Day return policy

Product History:

Belva MDFD12 thumbnail
(newest, current model)
House Brand 12SQB thumbnail
(previous model, replaced by Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12))

Speaker Box / Enclosure Specifications

Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
Subwoofer Cutout Shape
This is the shape of the enclosures cutout hole and defines the style of subwoofer that can be installed.
Round / Circle
Box Type
Represents the style of the enclosure. Be sure to purchase the appropriate enclosure type and internal volume that will be compatible with your subwoofer's recommendation.

Sealed - Sealed boxes are those that have no holes or vents in it. The only hole in a sealed box is where the subwoofer is installed. Smaller sealed boxes require more power than a larger sealed box. They provide a tight, accurate bass, while the larger sealed enclosures provide a "boomier" and louder bass.

Ported / Vented - Ported/Vented Enclosures provide an even boomier, louder bass, but less accurate then a small, sealed box. Ported enclosures typically require more airspace per sub and also less power output from an amplifier to perform correctly.

Bandpass - Bandpass enclosures make subwoofers perform efficiently, but loose. The bass is not as "boomy" as a ported enclosure nor as punchy as a sealed enclosure. Bandpass enclosures work well with lower to mid-level subwoofers.
Sealed
Number of Subs/Speakers
This value represents the number of speakers or subwoofers that the enclosure accommodates.
2
Box Style/Shape
The box style or shape refers to the actual shape of the box. Square and rectangular boxes are straight-edged boxes on all sides, whereas hatchback and truck style enclosures feature an angled front or back design that allows for installation in places short on depth such as single cab pickup trucks. You can also use such enclosures in hatchback cars or other vehicles where space is a premium. Tube and cylinder shaped boxes were made popular by Bazooka and are a great option for those looking for a nice amount of bass without sacrificing lots of space. They may even fit in locations that slim truck boxes cannot fit in. If the enclosure is vehicle specific, we encourage you to read the product description to find out which vehicles the enclosure is made for.
Square/Rectangle
Cutout Diameter or Length
The actual diameter of the hole in the subwoofer box. Length is the measured length per side of a square subwoofer or speaker opening.
11"
Maximum Speaker Depth
Your subwoofer or speaker must not exceed this dimension in order to properly mount in this enclosure.
13-1/4"
Total Box Volume
The internal volume measurement in cubic feet before subwoofer magnet displacement.
2.46 cubic feet
Box Volume (Each Chamber)
This is the total air space inside each chamber of the empty subwoofer enclosure. By matching this value with the recommended air space of the subwoofer, you will be able to know if the subwoofer will match this box.
1.23 cubic feet
Height
The height of the item, measured from top to bottom, in inches.
14-1/4"
Width
The width of the item from left to right (side-to-side) measured in inches.
28-1/2"
Depth
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
14-1/4"
Wood Thickness
The thickness of the wood the enclosure is made of, measured in inches.
3/4"
Number of Terminals
The number of terminals the enclosure has. Each terminal represents 1 positive and 1 negative.
2
Terminal Type
Spring clip terminals work best with bare wire connections with small-gauge speaker wire, or pin-type connectors.

Binding post terminals are a sturdier, more versatile type of speaker terminal. Because binding post terminals are are threaded, you can tighten them down against the wire or connector for a tight, clean connection. The most popular style of binding post terminals is known as a "5-way binding post". This type can accept bare wire, or any of the common speaker wire connectors. Binding posts with the option to be used with banana clips are even more versatile

Spring posts are a hybrid of the two. Instead of using a thread and "screwing" them tight, they use a spring to allow the wire to fit and tighten against the terminal.

Binding posts (banana clip ready)
Box Exterior Color
The color of the enclosure's exterior/outer finish.
Black
Box Finish
The material used on the outside of the box. Most boxes are carpeted to prevent exterior scratches; however vinyl is popular as it can often be color-matched to a near exact look of your leather factory interior.
Carpet

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
74%
4 Star
20%
3 Star
5%
2 Star
2%
1 Star
0%

Average Attribution Rating

Durability
4.6
Value
4.8
Features
4.6
Design
4.6
Usability
4.8

Dennis

Troy, AL

Overall
Durability
Value
Features
Design
Usability

Good Box

May 4, 2012

Great box does well with my subs would buy again

2 of 2 found this helpful

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JZ

East Texas

Overall
Durability
Value
Features
Design
Usability

Solid Box

July 13, 2014

Ok so I bought this box because I wanted a quick sealed enclosure for my 2 JL W3's. The box is made pretty solid, true 3/4 MDF but the caulk job on the inside was kind of off but that's nitpicking. Haha after 3 weeks though of pushing my W3s the top of the box is leaking air. So not the best made but definitely a good pre fab and pretty cheap. Can't really complain. It is nailed together tho so yea..

0 of 0 found this helpful

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Austin

Gainesville, fl

Overall
Durability
Value
Features
Design
Usability

Great box

June 24, 2014

This is a great box. I prefer ported but my trunk is too small for it so I had to go with sealed. I'm still happy though. This had the perfect size for my 12s. Also the measurements are a little off. The box is a little bigger that the description said.

0 of 0 found this helpful

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Andrew

orem, UT

Overall
Durability
Value
Features
Design
Usability

nice & clean

June 9, 2014

I replaced my old box with this 1 & man what a difference. My old box was 11 years old & I didn't realize it was falling apart & with this new box I noticed an instant difference. Its a great box for the price, it holds firm & can handle the full pressure of 1100 RMS I did have to spray a little adhesive inside for 1 part of the foam & terminals were screwed in & not exactly straight & I also had to poke holes in the foam for wires but these things are no problem. The box is awesome & I will by more in the future

0 of 0 found this helpful

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Tyrus

Lawrenceville, PA

Overall
Durability
Value
Features
Design
Usability

good cheap starter box

May 5, 2014

i bought this box about a year ago for 2 of my infinity reference 1260w subwoofers. I have two more in a ported box. im pushing 350w to all 4 and I have to say I like this box more than the ported. you feel it more in the sealed box but lose a little on the db's but its worth it. the box is sturdy and hasn't showed wear a bit. its tuned in the lower 40's so you wont get stupid low with it but can get loud. I would recommend it to anyone on a budget or to lazy to build their own box. it comes with polyfill which is a bonus, the terminals on the back need calked but that's with about any box you buy. overall I like it and would buy again if I had to.

0 of 0 found this helpful

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patrick

sanford, NC

Overall
Durability
Value
Features
Design
Usability

Great box

March 22, 2014

I have this box with 2 kickers 12 in back of a Nissan altima and they soundgreat. Would recommend to anyone and would definitely buy again. Sonic electronix is the best

0 of 0 found this helpful

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Scott

Fort Wayne IN.

Overall
Durability
Value
Features
Design
Usability

Heavy Duty!

February 3, 2014

I would recommend this product for the guy's out there that are serious about their music. If you got good, high quality subs, then this box will make them perform to your sub's max output with out worry of blowing up your box.

0 of 0 found this helpful

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Robert

Georgetown, TX

Overall
Durability
Value
Features
Design
Usability

Fast and easy great buy

January 3, 2014

I got my complete set up: 12" kicker subs box 1000watt Mbquart amp and amp kit. I have always installed my own equipment, I found it helpful that they have videos that covered some of the product they carry. There are a few shop's in Texas like Best buy and Custom Sounds that offer equipment. But the professionalism of the knowledgeable staff the price and the reliability made it clear that I wanted to do business with them.

0 of 0 found this helpful

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Devin

Allegan, MI

Overall
Durability
Value
Features
Design
Usability

good box

January 1, 2014

I bought this box to house two Pioneer TS-W309D2 subs. Box has a solid construction. I could not feel any air coming from the seams.

0 of 0 found this helpful

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EJ

Rock Hill, SC

Overall
Durability
Value
Features
Design
Usability

Awesome "BANG" for your buck

October 25, 2013

I am on a budget, like most of us. I needed a nice looking box for a reasonable price. For $52.00 you can't beat it. I loaded my 2 12" Alpine TypeS subwoofers in it. Mounted my amp to the back and they are still going strong.

0 of 0 found this helpful

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BASSHEAD

Lake Worth, FL

Overall
Durability
Value
Features
Design
Usability

very good sub box

October 11, 2013

The box is very good at 1.25 cubic feet. I'm running 2 12's with 800 watts rms and it hasn't shattered. Wish it was 1.35 cubic to accommodate for subwoofer basket displacement but it still makes makes subs hit ridiculously hard. Polyfill helps make the box seem bigger due to mechanics and the "Q" point. I really couldn't be happier!

0 of 0 found this helpful

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Jasun

College Park, GA

Overall
Durability
Value
Features
Design
Usability

solid sealed box!!!

October 8, 2013

Cant beat the price. But it is really very good box. I put two 12" hifonic,also bought from here, with a 2 channel 1000 watt amp.It really shook my rearview mirror in my '97 towncar. My brother loved it so we put it in his '92 prelude.Wow!!! You can hear him before you see him. Great buy!!!

0 of 0 found this helpful

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Mark

Berwick, PA

Overall
Durability
Value
Features
Design
Usability

It's a box without a hole

October 4, 2013

Solid sealed enclosure. Two of them barely fit in the back of my 02 Focus SVT 3 door. The binding posts are cheap, I tightened them as I would other posts but one out of eight wouldn't tighten because the thread tolerance is poor and it acts like its stripped, I can get some pressure on the wire but I worry it will come loose. Probably worth spending a little more money on a better enclosure but it works fine if you're on a budget.

0 of 0 found this helpful

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KaNE

Spokane, WA

Overall
Durability
Value
Features
Design
Usability

great!!!!!

September 27, 2013

was just the right amount of space i needed for the 12's

0 of 0 found this helpful

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Michael

Breezy Point, MN

Overall
Durability
Value
Features
Design
Usability

Good bang for the buck

September 19, 2013

It's tough to build a box for the price you can buy one of these. They are solid. I haven't had any issues with mine.

0 of 0 found this helpful

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brandon

greenville, SC

Overall
Durability
Value
Features
Design
Usability

soso box!

August 27, 2013

Nice and built! really small box, has nice and deep sound... but the 12in kicker crvs need more space I think

0 of 0 found this helpful

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Alec

Phoenix, AZ

Overall
Durability
Value
Features
Design
Usability

Good Quality

July 20, 2013

I would definitely recommend this box to a friend, Nothing like a good old professionally made box, I love the material that they put in it, it really adds to the sound.

0 of 0 found this helpful

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big dav

Mitchell.SD

Overall
Durability
Value
Features
Design
Usability

good box cheap but good

June 19, 2013

this box is deferentially cheap but i put my 2 kicker comp 12's in there makes the sound good but i am thinking of getting a ported box soon, box is made with good material and i like it have it wired down to 2 ohms its sound good

0 of 0 found this helpful

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Roxie

Chester, VA

Overall
Durability
Value
Features
Design
Usability

Great Value!

April 4, 2013

I ordered this item for my grandson and he loves it.

0 of 0 found this helpful

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Jonathan

Missoula, MT

Overall
Durability
Value
Features
Design
Usability

Its a box

April 4, 2013

have kicker 12, they sound alright have some loose paneling in my car, so I'm having trouble getting the clarity I want. over all its a box and it works.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

Your Price $89.99

Belva BAK42 - 4 Gauge Amp Kit

CCA 4 Gauge Wiring Kit with RCA & Speaker Wire

Your Price $29.99

8 Gauge - Stinger Amp Kit

Single amplifier 4000 Series complete installation kit.

Your Price $39.99

Belva BAK02 - 1/0 Gauge Amp Kit

CCA Wiring Kit with 2-Channel RCA & Speaker Cable

Your Price $59.99

NVX XKIT02 - True Spec 1/0 Gauge Amp Kit

Pure Virgin Copper, Full 1/0 Gauge Amp Kit with RCA

Your Price $149.99

High-Performance Streetwires Speaker Wire

25 ft. of 12 Gauge speaker cable with twisted pair construction for improved power flow and fine-stranded copper windings.

Your Price $44.95

NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

Your Price $7.99

20 ft. of Dynamat Xtreme Trunk Kit

Keep your trunk from rattling and improve bass quality by using a sound dampening trunk kit.

Your Price $109.95

NVX SDBP40 - 40 ft. (10% More Than Competition)

40 ft. Bulk Pack of Sound Dampening Material

Your Price $119.99

36 ft. of Dynamat Extreme Bulk Pack

Make your sound system sound perfect by reducing road noise with 9 sheets of sound dampening material.

Your Price $159.95

Banana Clip Terminals

These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.

Your Price $3.99

Insulated Female Quick Disconnect Connectors

100 pack of 12-10 Gauge yellow insulated quick disconnects.

Your Price $7.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles or can be used for your polyfil.

Your Price $6.99

Car Stereo and Speaker / Subwoofer Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $12.99

Product Summary

Manufacturer

Model Number

MDFD12

UPC

818060010125

Weight

37.00lbs

Internal SKU

mdfd12

Internal Product ID

1583

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: Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)