Expert Service 1-877-289-7664 [Hours]

Sonic Closeout Sale

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
|

List price $89.99

You Save: $40.00 (44.45%)

$49.99

with warranty

+ FREE Shipping in US 48

Order within 4 hrs 24 mins to ship today

Arrives by Wednesday, Mar. 4 to zip 07095

Add an Extended Warranty

SquareTrade Product Warranty
Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

In Stock

Arrives by Wed, Mar. 4

Get FAST answers from customers ASK a Question See questions answers

Bundled Savings with this Product

=

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. This offer cannot be combined with any other coupons or offers.

5.00

1583

401

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

$49.99

+

50% OFF

Belva BBSW127

$9.99

Special Price $4.99 ($9.99 if purchased separately)

Belva BBSW127

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

(Offer 1 of 1)

Combined Total Price

$54.98

You Save $5.00

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
75%
4 Star
19%
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
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.

28 of 38 found this helpful

Was this review helpful to you?

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!!!

19 of 32 found this helpful

Was this review helpful to you?

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.

13 of 22 found this helpful

Was this review helpful to you?

Dennis

Troy, AL

Overall
Durability
Value
Features
Design
Usability
Good Box

May 4, 2012

Great box does well with my subs would buy again

16 of 28 found this helpful

Was this review helpful to you?

Dylan

Kerrville, TX

Overall
Durability
Value
Features
Design
Usability
great box

January 5, 2015

Very sturdy well built. Allows maximum bang. Great price under $60

13 of 23 found this helpful

Was this review helpful to you?

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

12 of 21 found this helpful

Was this review helpful to you?

Steve

Denver, CO

Overall
Durability
Value
Features
Design
Usability
Good value, good quality

November 28, 2010

Bought the MDFD12 for my son. Installing the subwoofers was very easy and the enclosure looks great. Highly recommend.

3 of 4 found this helpful

Was this review helpful to you?

Kevin

White Lake, MI

Overall
Durability
Value
Features
Design
Usability
The Box that Rocks

November 1, 2014

Appears to be fairly well built. Arrived with a little dent and a tear but its too little to bother with. Sounds nice but doesn't hit as deep as I would have liked. Small size however, leaves me some room for a couple of bags of groceries. Three stars for durability since I've only owned this for about a month.

14 of 27 found this helpful

Was this review helpful to you?

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.

12 of 23 found this helpful

Was this review helpful to you?

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.

14 of 27 found this helpful

Was this review helpful to you?

Arron-O-Suarus...

Salt Lake City, Utah

Overall
Durability
Value
Features
Design
Usability
Amazing Enclosure, Even Better Price.

February 16, 2012

Ordered this as my first enclosure, put two 12" subs in it and I haven't found a box that hits as hard and as clean as this one has. Will definitely buy from SonicElectronix again for my car audio needs.

8 of 15 found this helpful

Was this review helpful to you?

Mike

West Chester, OH

Overall
Durability
Value
Features
Design
Usability
Great Box

November 27, 2011

I ordered this for 2 crunch gpv's about six months ago because I didn't have the tools to properly build my own box. After six months this box is still holding up and works perfect with my subs.

9 of 17 found this helpful

Was this review helpful to you?

cesar

Haw river, NC

Overall
Durability
Value
Features
Design
Usability
Kick a**

August 4, 2011

The sub box was really good.

4 of 7 found this helpful

Was this review helpful to you?

mike

springfield illinois

Overall
Durability
Value
Features
Design
Usability
bangn

December 8, 2010

Love it nice size for my subs still banging the same system

6 of 11 found this helpful

Was this review helpful to you?

Raphael

North Las Vegas, NV

Overall
Durability
Value
Features
Design
Usability
A little trouble at first...

October 31, 2010

The whole was no the size it said it was. I happen to be a part-time handy man so I had a circular sander and was able to make the whoel bigger. Took about an extra 20 mins of work to mount the subs, but overall everythign worked out. No complaints about box. It is doing it's thing!

2 of 3 found this helpful

Was this review helpful to you?

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.

8 of 16 found this helpful

Was this review helpful to you?

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!

9 of 18 found this helpful

Was this review helpful to you?

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.

12 of 24 found this helpful

Was this review helpful to you?

james

huntington, IN

Overall
Durability
Value
Features
Design
Usability
quality product

February 11, 2013

This enclosure is a well built enclosure for sq applications. I purchaced to house 2 CV vmax 122 drivers and the sound quality was almost rubbery? not tinny, never a crackle....fluid almost..... call it a well dampened sound with minimal distortion. just clean bass all the way into the 20s. made sounds i diddnt know existed. if you dont care how your music sounds and just looking for loud, look elsewhere. my only complaint, 11" cutout is too small for the vmax and the black carpet is difficult to follow a line with the router.

10 of 20 found this helpful

Was this review helpful to you?

1Clean300

Newport News, VA

Overall
Durability
Value
Features
Design
Usability
Great box

December 21, 2012

Great box for the price and it can fit in any trunk.

9 of 18 found this helpful

Was this review helpful to you?

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

Atrend 12MG

12" Protective Waffle Style Subwoofer Grille (1 Pair)

Your Price $4.95

Atrend 12G

Chrome Bar Style Grille for 12" Subwoofers (1Pair)

Your Price $19.95

Atrend 12GB

Black Bar Style Grille for 12" Subwoofers (1Pair)

Your Price $19.95

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 $164.95

Banana Clip Terminals

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

Your Price $1.99

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 $14.99

Browse 3 questions and 8 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
cause i need this to put the speakers in.
Daniel S on Feb 10, 2015
I like the Company who built it
Cacey S on Oct 23, 2014
sealed and caulked was a benifit.
David D on Nov 16, 2014
Good reviews. Good price. Right dimensions for this application.
DAVID D on Aug 22, 2014
will orion hcca 12s fit in this box dont have the means to build a box can u point me towards a box that will fit them please?
A shopper on Aug 27, 2014
Best Answer: You can use that box for them if you dont have the means of building your own, although it is recommended to build your own it is not necessary. You will have plenty of air space to get all the audio you will want out of those subs. I do reommend changing the terminals on the box as they are prone to melting with bigger subwoofers. Hope this helps, good luck!
Reply · Report · Denver D on Aug 27, 2014
· Add Answer · I Have This Question Too (0)
When will you get these since they are on backorder?
A shopper on Dec 11, 2014
Best Answer: Hello,

Unfortunately, we have not received an honest date from the manufacture. This implies that the enclosure is likely on a Manufacture's Backorder. Please check back with us in two weeks for more possible info.
Reply · Report · Sonic Electronix SStaff on Dec 14, 2014
· Add Answer · I Have This Question Too (0)

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)