1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS1215)

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.5 cu ft airspace)

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General Features:

  • Single Sealed 12" Enclosure
  • Internal box volume: 1.5 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: 16"L x 17"D x 13-1/2"H
  • 30 Day return policy


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.
1
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.
15"
Total Box Volume
The internal volume measurement in cubic feet before subwoofer magnet displacement.
1.5 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.
1.5 cubic feet
Height
The height of the item, measured from top to bottom, in inches.
13-1/2"
Width
The width of the item from left to right (side-to-side) measured in inches.
16"
Depth
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
17"
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.
1
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
Tuning Frequency
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.

Port Details

Tuning Frequency

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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
77%
4 Star
19%
3 Star
3%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.6
Value
4.8
Features
4.5
Design
4.7
Usability
5.0
Joe

Rockingham, NC

Overall
Durability
Value
Features
Design
Usability
Giveaway

March 17, 2014

At the price they are asking,($40 shipped), this is a no-brainer. You'd be very hard pressed to buy the MDF used in this enclosure for the price they are selling the complete box for. Its true 3/4", ( I laid a caliper to it to check), and its advertised dimensions and airspace are spot on.

73 of 86 found this helpful

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Big O

Pittsburgh, PA

Overall
Durability
Value
Features
Design
Usability
A winner

September 1, 2014

This is just what the woofer doc ordered. The poly fill is already installed. The black carpet looks great. I'm installing a Rockford T-1 dual 4 ohm 12 in the box. I'm anxious to hear how this is gonna sound in my Mark VIII.

71 of 85 found this helpful

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Bruce

West Des Moines, IA

Overall
Durability
Value
Features
Design
Usability
Great bass

January 10, 2015

Bought this for an old punch 2 I had sitting around that I put into my sons car. Previously it was in a small truck box for an s10. Couldn't believe the difference that this box made. The sub is getting 200 watts from the little fosgate amp that I had for it but it is twice as loud as it was in my truck with no distortion. Obviously I had it in way to small of a box before. I got one happy kid though.

67 of 80 found this helpful

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john

Marietta, OH

Overall
Durability
Value
Features
Design
Usability
Good box!

December 28, 2014

For a pre built box it does the job very well! The poly fill is useless if you need a bigger box just order a bigger box... No leaks what so ever. I did replace it for a custom built ported box.

65 of 76 found this helpful

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Derek

apple creek, OH

Overall
Durability
Value
Features
Design
Usability
Great price

August 29, 2013

I'm running a rockford fosgate p2 in it. This box has held up great. i can hear a very small leak but only when I was checking for leaks. Otherwise it was inaudible from even a few feet away. Being 100% sealed is very crucial considering it is a sealed box. But overall id say that this is a great box. Cant beat the price. Nothing a little silicon cant fix.

66 of 78 found this helpful

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Davy

Chicago, il

Overall
Durability
Value
Features
Design
Usability
solid box

March 31, 2014

Solid box had one screw that didn't grab anything must of hit a soft spot in the wood other then that solid box

66 of 79 found this helpful

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Charles

punta gorda, FL

Overall
Durability
Value
Features
Design
Usability
SEALED ENCLOSURE

May 8, 2014

Yes its a prefab box, it is constructed very well with .75" MDF. Solid no leaks.Carpet well done.Looks nice. Just match the air space you want for your sub and your done. I could not build this for the price i paid, so its a no brainer for me. If i was looking for ported or vented i would build one myself because of propper tunning. Just wanted something simple and this exceeded my expectations.

67 of 82 found this helpful

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Joshua

Fuquay varina, NC

Overall
Durability
Value
Features
Design
Usability
Exactly what I needed.

February 26, 2015

I purchased this box to house an Alpine type E sub. I had originally intended on building my own box, but after looking around at the prices of MDF, I found this box, I literally couldn't purchase the materials cheaper than buying this. It's sturdy, and is a perfect match for my sub. I am extremely pleased with my purchase, and would recommend it to anyone looking for a very well built, sealed, enclosure.

60 of 70 found this helpful

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MT

Cleveland, OH

Overall
Durability
Value
Features
Design
Usability
Seems very well made

January 22, 2014

I have a 2700w on a 3400w amp installed on this Subwoofer Enclosure and play it very loud all the time and still no air leaks. This box is Big in the inside, looks like a mini tunnel. The Poly Fill is pertty well laid out, you will have to move a little out of your way to access the Speaker terminals but trust me its no big deal at all. Since the box is so big for a single box, it does not move around trunk nearly as much as smaller single boxes. Had it about a month and two weeks since the time this review was written.

63 of 78 found this helpful

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DreamMaker

Conroe, Texas

Overall
Durability
Value
Features
Design
Usability
Solid Box

September 29, 2013

I use a JL Audio W3 in this box. It is firing to the rear in a Honda accord coupe. The sub has about 350 watts running to it. The box is very well built. The sound from it is perfect. I am very satisfied with my purchase.

59 of 70 found this helpful

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ken

Topeka, KS

Overall
Durability
Value
Features
Design
Usability
Awesome price and fast shipping

August 5, 2013

Very nice for the money. You can't go wrong with this box. Very nice craftsmanship. Does not come pre-wired though. More than enough poly fill though and very durable carpet.

61 of 74 found this helpful

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Zachary

Farmington, CT

Overall
Durability
Value
Features
Design
Usability
decent box

September 17, 2013

I bought this box to house a 122x MOFO, which is kind of a tall order. The box is pretty thick and definetly acceptable for the price. Definetly plain jane. I wouldnt exspect it to stay perfectly sealed for more then a year with the sub I was useing but held up just fine for the 3 months I used it. Pretty good for the price and would definetly survive for a long time without any abuse.

59 of 71 found this helpful

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William

Dallas, Tx

Overall
Durability
Value
Features
Design
Usability
Nice Touch!!!

June 12, 2013

This box has bundled with the NVX 12" VSW sub and it does some good bass! Well crafted, quality carpet, more than enough polylester. It doesn't come pre-wired though, but since it was a free bundle... I could careless!

59 of 71 found this helpful

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Jonathan

Riverside, CA

Overall
Durability
Value
Features
Design
Usability
Decent subwoofer enclosure

September 17, 2013

I wish it was a little smaller since it is a sealed enclosure. But it does put out a nice sound with the poly fil.
I'm sure you can find better, smaller boxes

58 of 70 found this helpful

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Jon S

Shreveport, LA

Overall
Durability
Value
Features
Design
Usability
Belva MDFS1215 1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure

September 21, 2013

Looks good, well built, and when paired with an appropriate subwoofer for the airspace specified it sounds great!!

56 of 67 found this helpful

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Connor

Bremerton, WA

Overall
Durability
Value
Features
Design
Usability
Good product

December 4, 2014

High quality material, convenient, and super easy to install. Looks good too.

57 of 70 found this helpful

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Nate

Eastern, PA

Overall
Durability
Value
Features
Design
Usability
Just do it!

October 21, 2013

I totally expected this box to be a temporary solution to be replaced later by a "real" box. Well, I like it just the way it is. Won't be building that "real box" anytime soon! I have a Massive Hippo 122 and 3600 watt amp, so I expected the box to explode at some point, but it hasn't and it sounds great! Thick, heavy, tight, clean, handsome, cheap!!!

53 of 65 found this helpful

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NavyLarz

Rochester, MN

Overall
Durability
Value
Features
Design
Usability
Belva MDFS1215

September 17, 2013

This might be one of the best non-custom sub boxes that I've ever owned.

RE Audio SX12 + Rockford T5002

53 of 65 found this helpful

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chris

Newnan, GA

Overall
Durability
Value
Features
Design
Usability
Good product

April 28, 2015

Very nice box, and well built. I have a memphis c3 sub, powered by an alpine mrx-m110 @2ohms. I have only had it for a short amount of time, but it hasn't fell apart. So I'm satisfied. Would buy again.

30 of 36 found this helpful

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Franklin

Huntsville, AL

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Awesome box

August 12, 2015

Its a good box as expected. I've owned other Belva MDF boxes. Sounds great with my setup. Would buy again.

17 of 21 found this helpful

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Jarred

fayetteville, TN

Overall
Durability
Value
Features
Design
Usability
Good value

August 21, 2015

This a good box for the money. can't be beat for me being that it was free with my speaker purchase

Cons: some of the carpet material was peeling off when I opened it. Can hear some resonance with higher bass notes. Terminals are a bit cheap.

If you can't build your own go ahead and purchase it

This is coming from some one who has built boxes and installed many systems.

15 of 18 found this helpful

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Benjamin

Westlake Village, CA

Overall
Durability
Value
Features
Design
Usability
Good box

August 20, 2015

It performs just fine. The port is pretty cheap so I replaced it.

16 of 20 found this helpful

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NoOne

Colorado

Overall
Durability
Value
Features
Design
Usability
Perfect for what it's advertised as.

April 17, 2017

It's was the exact dimensions for the sub intended, looks good (other than the silly belva aluminium badge that was easy to remove) and has held up to an 800 watt rms sub thus far. Great for standard sized 12s though needs a little trimming for slightly oversized baskets.

0 of 0 found this helpful

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henry

plymouth, MN

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
heavy duty

December 16, 2016

High quality and integrity - it worked perfectly for my needs

0 of 0 found this helpful

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Brandon

Franklin, IN

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Good box

September 17, 2016

Got this one with a 12" NVX sub. Looks to be well constructed and should work out just fine. Could not build it for what these cost.

0 of 0 found this helpful

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jay

nipomo, CA

Overall
Durability
Value
Features
Design
Usability
Sealed box heaven!

September 16, 2016

Bought this for a 12" JL w3. Replaced a lager ported box that took up too much room in the trunk and was hard to tune for an overall flat system response. Ported gives you quite a bit more bass around 30-60hz but between 100-180hz it sounds horrible And if your crossing over around 125hz and want flat response, sealed is the way to go! This was a great bargain. Sturdy, light and perfect amount of airspace. I was worried that it was like .125 over my specs and had a small layer of dampener but in the end I just slapped it in and started tuning. Glad I did, sounds great!!!

0 of 0 found this helpful

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Kowrenz

Tucson,az

Overall
Durability
Value
Features
Design
Usability
Quality enclosure awesome look awesome price

September 7, 2016

This box is well made its perfect size and shape surprisingly light I would definitely recommend it to anyone

0 of 0 found this helpful

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Jim

Wethersfield CT

Overall
Durability
Value
Features
Design
Usability
You cannot build a better quality box for cheaper

July 14, 2016

I can't believe how much of a steal this box is. Very solid, sturdy box with attractive carpeting and even polyfil on the inside walls. Bought it for a Type R 12 and it sounds VERY good. Hits the lowest note in Young Jeezy's "Put On" easily! Never seen a sealed setup do that. If you're going sealed then buying this box is a no-brainer.

0 of 0 found this helpful

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nick

panama city, FL

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Deep bass, solid box.

May 11, 2016

I'm running a 12 inch Kicker Comp in this amd let me tell you, This is the deepest sounding sealed box I've ever heard. I had one from Best Buy that was a little bit smaller than this 1 and it doesn't even come close to being as deep sounding as this box. Honestly I prefer two of these boxes over my old double ported box I had. The build quality is outstanding. It's glued all the way around and there are no leaks. I shopped and compared boxes for quite a while and you're not gonna beat this one.

0 of 0 found this helpful

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Guru

Woodruff sc

Overall
Durability
Value
Features
Design
Usability
Great product

April 29, 2016

Good box but a little pricy.I would recommend shopping on this site

0 of 0 found this helpful

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NolesAndSteelers

Orlando, FL

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Great Box at a Great Price

December 26, 2015

I bought this sub box to house my NVX NSW124V2 (12" 4-ohm DVC) subwoofer. I use the NVX JAD 900.5 5-channel amp to power the sub. Wired at 2 ohms it gives me 440+ watts. The sealed box really puts out bass that's powerful, tight & accurate. After 30 days I haven't noticed any deterioration with the build. And I have been slamming my system so I could check speakers/amps/etc. The sub itself calls for a 1.25 cu ft space so this box works out perfectly IMO. Highly recommended.

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 $59.99

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 $36.99

Belva BAK02 - 1/0 Gauge Amp Kit

CCA Wiring Kit with 2-Channel RCA & Speaker Cable

Your Price $49.99

NVX XKIT02 - True Spec 1/0 Gauge Amp Kit

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

Your Price $149.99

Scosche WGB12

12" Protective Waffle Style Subwoofer Grille

Your Price $8.00

GS Audio BG-12

Chrome Bar Style Grille for 12" Subwoofers

Your Price $11.99

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 $99.99

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

40 ft. Bulk Pack of Sound Dampening Material

Your Price $99.99

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 $1.99

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 $8.99

Car Stereo and Speaker / Subwoofer Installation Tool Kit

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

Your Price $14.99

Product Summary

Manufacturer

Model Number

MDFS1215

UPC

818060011801

Weight

24.25lbs

Internal SKU

mdfs1215

Internal Product ID

67755

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: 1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS1215)

Item Added to Cart

1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS1215)

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.5 cu ft airspace)

$49.99

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NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

$59.99

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Scosche WGB12

12" Protective Waffle Style Subwoofer Grille

$8.00

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NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

$7.99

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