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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)

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List price $99.99

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$49.99

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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.

7.50

1583

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

$49.99

+

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 1)

Combined Total Price

$57.48

You Save $7.50

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
76%
4 Star
18%
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.

45 of 76 found this helpful

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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.

33 of 56 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!!!

40 of 71 found this helpful

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Dennis

Troy, AL

Overall
Durability
Value
Features
Design
Usability
Good Box

May 4, 2012

Great box does well with my subs would buy again

39 of 69 found this helpful

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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.

27 of 45 found this helpful

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bigmike

richmond va

Overall
Durability
Value
Features
Design
Usability
good value

August 10, 2010

product worked for my new hifonics subs. that will be a winter system for my ride so i don't have to keep my main subs in all year round. i really like it mostly because its has black carpeting.

21 of 33 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.

39 of 70 found this helpful

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gage

south bend, in

Overall
Durability
Value
Features
Design
Usability
good box

February 6, 2011

I bought this box for 2 12" kicker cvx subs 750 watts a piece its a great closed box for them especially stuffed 1/4 with pillow stuffing.. looks real good to.. quick shipping

32 of 58 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.

33 of 62 found this helpful

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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

23 of 42 found this helpful

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joe

Marshall, MN

Overall
Durability
Value
Features
Design
Usability
Great Sound!

August 1, 2009

i have 2- 12 inch Memphis audio 15-M3124D's in this box each putting out 2000 watts max hooked up to a MA audio HK10KA amp rated at 10,000 watts max. i have the subs bridged and it has way too much power going to them but the box still stands up. i would recommend that when you install your subs that you put some sort of foam stripping underneath the lip so when you screw it down you wont have and leaks at all.

13 of 22 found this helpful

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Tom

Wallingford, CT

Overall
Durability
Value
Features
Design
Usability
Okay

February 12, 2009

The box is leaking now. But the price and design was worth it all in all; it's just due to be resealed.

11 of 19 found this helpful

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Eric

Plano, TX

Overall
Durability
Value
Features
Design
Usability
Sleak, Sexy, Soundiful!

July 11, 2008

Its cheap, in price. Yeah, we see that. But let your worries go to rest, this is a GREAT BOX. Its well made, and put together great. Although they did use nails instead of screws, if you know what your doing, it won't slow you down. I have 2 12" Kickers in this baby, and pounds like a mofo.

Get this box. You won't be disappointed.

Best box for the price.

12 of 21 found this helpful

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Francisco

West Wendover, NV

Overall
Durability
Value
Features
Design
Usability
Belva MDFD12

March 16, 2015

Belva mdfd12 12" box is good quality and good affordable price really good size an make my subwoofer sound amazing... 5 star

12 of 22 found this helpful

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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

35 of 68 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

23 of 44 found this helpful

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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!

15 of 28 found this helpful

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Jerry O

Asheville,NC

Overall
Durability
Value
Features
Design
Usability
Dual 12" 3/4" MDF Sealed Subwoofer Enclosure

June 8, 2010

If you are looking for a quality made box this is it !! I was very impressed with this box the moment I opened it.

The WOW factor was at least a 10.5 on the 1 to 10 scale. I WILL BUY AGAIN .

15 of 28 found this helpful

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Tang

Somerset,NJ

Overall
Durability
Value
Features
Design
Usability
Sub Enclosure Review

April 13, 2010

Perfect size to fit my Infinity subs. Wish it came with mounting feet but can't ask for everything. Quality is legit for the price. Just your average rectangular box. Fit in the trunk of my 240sx which is pretty small.

11 of 20 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..

14 of 27 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.

31 of 61 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

26 of 51 found this helpful

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Justin

lecomton, KS

Overall
Durability
Value
Features
Design
Usability
Great

January 20, 2008

This is a great sub woofer box for the price it is heavy 41 pounds and it is sturdy. I have 2 12 kickers 600 rms 1500 peak and they sound great in this box hits lows and highs hard. I would say to any one buy it.

9 of 17 found this helpful

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William

Clarion, PA

Overall
Durability
Value
Features
Design
Usability
Great box

April 26, 2006

Runs 2 Rockford Punchs in and no air leaks and bass is clear as hell. Any 12 would sound great in this box, would buy again if it ever goes bad.

10 of 19 found this helpful

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Cara.

Ypsilanti, MI

Overall
Durability
Value
Features
Design
Usability
Great Subwoofers

September 29, 2010

Everything was going perfect with the two sub woofers i purchased. Great price & everything. But then someone stole my car & the woofers were in it. Anyways, they were GREAT while I had them.

13 of 26 found this helpful

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Bryan

Plainfield, IL

Overall
Durability
Value
Features
Design
Usability

October 28, 2008

Great price for this box, very reliable. I put 2 lanzar 15s in here and they sound great, would highly recommend buying this and not wasting more money on a more expensive box

9 of 18 found this helpful

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Tom

wallingford, CT

Overall
Durability
Value
Features
Design
Usability
GREAY BUY!

October 14, 2008

I put 2 P3 dual voice 12's in this box and they sound awesome .. cant beat the price.. the quality is there

9 of 18 found this helpful

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kyle

galloway, OH

Overall
Durability
Value
Features
Design
Usability
Great 12's Box

July 13, 2007

This box is designed well. It is assembled, sealed, and carpeted very well. Speaker terminals are nice inside and out. Couldnt be any happier with this enclosure. Will use box with various subs.

9 of 18 found this helpful

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Shawn

Poughkeepsie, NY

Overall
Durability
Value
Features
Design
Usability
Excellent!

June 28, 2007

Cheap and effective! This is truly one of the best boxes that i have bought for the price it is. Sounds great and made very well!

9 of 18 found this helpful

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Keith

Navarre, OH

Overall
Durability
Value
Features
Design
Usability
Good Box

December 28, 2006

I have this box with two hifonics subs, hooked up too a hifonics 1600 wat amp. Its a very good box and hits really good. Would approve to anyone.

11 of 22 found this helpful

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Maxwell

Fargo, ND

Overall
Durability
Value
Features
Design
Usability
Tuff Stuff

June 8, 2006

Nice heavy, good sounding box. I would reccomend putting some polyfil to "cushion" the backfire of the subwoofer, really helps w/any sealed box and totally makes a valuable difference considering it only costs about 5-10$ more. The box itself is well sealed and well made, the connectors on the inside and out are really easy to use and once connected your wires will stay put.

10 of 20 found this helpful

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tom

Plymouth, MA

Overall
Durability
Value
Features
Design
Usability
ELW1214.2 BOX

June 8, 2006

Superb Box! Tight sounding bass, and best of all deep rumbling bass. Excellent for an audiophile like me.
Easy to install and use!

9 of 18 found this helpful

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Mac

San Diego, CA

Overall
Durability
Value
Features
Design
Usability
Your basic sealed box

March 14, 2005

Great box. Quality carpet job, all seams sealed correctly and well, and the terminals are strong and functional. Perfect basic box to make two twelve's hit perfectly. Just remember this is a sealed box, so it will have a differnet sound than that of a ported or bandpass box, but if u want a tighter hitting bass, this box if perfect.

9 of 18 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.

19 of 39 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!

21 of 43 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

12 of 25 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.

17 of 35 found this helpful

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CD

Omaha, NE

Overall
Durability
Value
Features
Design
Usability
Great Box

February 5, 2013

Subs fit great and the construction was sound. Thanks Sonic!

14 of 29 found this helpful

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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.

22 of 45 found this helpful

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SlyGuy

Columbus, GA

Overall
Durability
Value
Features
Design
Usability
Must Have!!!!!

September 4, 2012

This is an awesome enclosure. The price is very competitive as well. I am running 2 Rockford Fosgate R2D2-12 and there is no distortion at all. It is a very tight, clear sound. I highly recommended for anyone looking for a high quality low cost setup.

9 of 19 found this helpful

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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.

25 of 51 found this helpful

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Ryan

Metlakatla, AK

Overall
Durability
Value
Features
Design
Usability
Good product

November 2, 2011

Built very sturdy except for the terminals. Its easy to switch those out though so no complaints. Thanks Sonic!

13 of 27 found this helpful

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christopher

richmond, VA

Overall
Durability
Value
Features
Design
Usability
GET WHAT YOU PAY FOR!!

August 21, 2007

This box looked great and felt very durable. My subwoofers wouldnt fit at first so I had to do some shaving, NO PROB. It sounded good for awhile and I loved it. After about two weeks, it lost its sound, went to check out the problem the whole front of the box had almost came off, Box was sealed very well, too bad they used nails instead of screws, would have been a very good box.

13 of 27 found this helpful

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Jeffrey

Tucson, AZ

Overall
Durability
Value
Features
Design
Usability
Good Sub Box

August 6, 2007

I like it, I think the covering looked good but I ended up messing it up trying to screw something into the outside. Otherwise i liked the box, my subs hit good in it.

9 of 19 found this helpful

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Johnjel

Griffin, GA

Overall
Durability
Value
Features
Design
Usability
Extremely well built

June 22, 2006

Insanely well built box.

Carpet job is top notch, Good quality carpet stretched perfectly over the box. All joints are glued and caulked well. theres no need for extra bracing here but you may add some 2x4's to reduce the airspace if needed. The gold push terminals are well sealed in place.

Hits low and hard with all sub's I've thrown at it (JL Audio 12W04's, Rockford Fosgate P312D4's, Kicker CVX12's and finally Alpine SWX-1242D's)

Don't be afraid of the price. It's a perfect price for a box of this caliber. Would recommend it to anyone.

9 of 19 found this helpful

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Brady

San Bernardino, CA

Overall
Durability
Value
Features
Design
Usability
best box 4 the buck

April 24, 2006

Don't let the skimpy price fool you. This box is made very well and it's ready to go. The joints are already caulked and glued - so there is nothing more to do than mount you speaker.

It's not MDF(medium density fiberboard) like all the others, it is made from HDF; high density fiberboard. HDF boxes are typically stronger, stiffer, and lighter than MDF enclosures. The box does not require any additional bracing because of its density. It has a high an undetectable high frequency resonance and doesn't color the sound of your bass with unwanted buzzing or flexing. The HDF box is lighter than MDF because it has smaller fibers that when pressed and heated require less glue and resin to bind the fibers together.

The speaker terminals are screw type gold plated binding posts that will hold 12 g speaker wire easily. They screw into the enclosure for added strength and a tighter seal.

Just make sure that you do your math and pick the right sub for the cubic feet and stuff with poly fiber fill.

8 of 17 found this helpful

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Jonathon

Corry, PA

Overall
Durability
Value
Features
Design
Usability
good box

April 5, 2015

It is a good prefab sealed box. I looks good and is functional.

12 of 26 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.

17 of 36 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.

34 of 70 found this helpful

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A4forthewin

Charleston, SC

Overall
Durability
Value
Features
Design
Usability
Easy, cheap price, great quality

February 15, 2013

I bought this box for some Rockford Fosgate P1's and I couldn't be happier. The box is solid and produces some really good sound in my Audi.

11 of 24 found this helpful

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Big A

Colorado

Overall
Durability
Value
Features
Design
Usability
Perfect

January 6, 2013

Not much else to say besides great product. Shipped in only 3 days, and the pre-done polyfill is a great touch. My only comlaint would be that my car smelled like glue for a few days after I put this box in, but that's just nit-picking. Will definitely order boxes from Sonic in the future!

15 of 32 found this helpful

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Curtice

Redington Shores, FL

Overall
Durability
Value
Features
Design
Usability
great box

August 18, 2006

this box is light weight. its made strong and fits every sub ive ever used in it.

9 of 20 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

10 of 23 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.

25 of 53 found this helpful

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Joe

Clovis, NM

Overall
Durability
Value
Features
Design
Usability
ok so far

February 20, 2012

Installed this weekend, I did add a couple pounds of "pillow stuffing" since the box was a tad smaller then what I needed. I have noticed some flex already but im not suprised with the subs that are in it. I will add triangle shaped gussets and some "trim screw" to try and hold things together.

A sheet of real MDF (not the cheap underlayment) is $32, carpet and glue around $15 so for what they want for this its a good deal that just needs some minor tweaks.

17 of 37 found this helpful

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cesar

Haw river, NC

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Durability
Value
Features
Design
Usability
Kick a**

August 4, 2011

The sub box was really good.

13 of 29 found this helpful

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John

Tustin, CA

Overall
Durability
Value
Features
Design
Usability
Nice Box

June 22, 2006

This box is pretty clean...nice black fabric, enough to hold the subs and gives them enough air to makes the subs bump and bump and bump and bump! Good buy at an unbeatable price. Awesome.

12 of 27 found this helpful

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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.

30 of 64 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.

16 of 36 found this helpful

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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.

25 of 54 found this helpful

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devin

South Elgin, IL

Overall
Durability
Value
Features
Design
Usability
this is a solid box

October 12, 2007

when i bought this box i wasnt really expecting much, because of the price an all but when i put my rockford fosgates's in it, it did sound great, and let me tell you im gettin 2 12 alpine type r next and im for sure going to be getting this box again.

so dont let the price scare you trust me you wont be disappointed

9 of 22 found this helpful

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Julius

Keller, TX

Overall
Durability
Value
Features
Design
Usability
Great Box

March 16, 2006

This is a well built box. Great quality carpet. If you want a good box without paying high prices this is perfect.

8 of 20 found this helpful

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Gene

Fort Leonard Wood, MO

Overall
Durability
Value
Features
Design
Usability
nephew

January 5, 2015

My nephew loved this product along with the Autotik amp and Kenwood subs for Christmas. I even upgraded my old amp with a 4000 watt PZX Crunch amp to keep up with my nephew and his system lol

13 of 31 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

16 of 37 found this helpful

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Jerry

Asheville,NC

Overall
Durability
Value
Features
Design
Usability
WOW Great Quality

July 22, 2011

I purchaced your Dual 12" sealed sub enclosure and added two Alpine R's and fosgate 1000w amp and WOW does not even come close, it Rocks. The quality of the box is really really impresive. The carpet in not the junk material I've seen in my other buddies combo's.
When you buy this box you know it will deliver and last a long time.... Sonic, keep up the good work!

18 of 41 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.

11 of 29 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

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

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

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 $94.95

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 $159.99

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 $16.99

Browse 4 questions and 12 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
awesome construction.. you could never build this same box yourself for this price unless you were set up to build a ton of them..
Paul V on Apr 30, 2015
Good box, and small enough to fit in smaller cars
Vinny I on Mar 3, 2015
Ive never had a box lined on the inside so i figured id give it a shot
Kortillous W on Apr 16, 2015
cause i need this to put the speakers in.
Daniel S on Feb 10, 2015
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 (1)
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)
Will Pyle PL1290BL subs fit in this box? also will they reach a deep output?
bmusser98 on May 18, 2015
Best Answer: I put two Alpine Type R's in mines. Decent size box put in my 2002 Acura and still had a lil trunk space
Reply · Report · Thurmon P on May 18, 2015
· 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)