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)

In Stock
|

List price $69.99

You Save: $30.00 (42.86%)

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$39.99

with warranty

Order within 22 hrs 42 mins to ship 11/15

Arrives by Saturday, Nov. 17 to zip 20147

60-Day Money-Back

Hassle Free Returns

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Warranty assistance for a year

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Get a FREE Sealed Enclosure with Your Subwoofer Purchase!

Add a FREE Belva MDFS1215 Sealed Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

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Get a FREE Sealed Enclosure with Your Subwoofer Purchase!

Add a FREE Belva MDFS1215 Sealed Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

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Get a FREE Sealed Enclosure with Your Subwoofer Purchase!

Add a FREE Belva MDFS1215 Sealed Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

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Save 5% on a Sealed Enclosure with Your Subwoofer Purchase!

Save 5% when you add a Belva MDFS1215 Sealed Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

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Save 5% on a Sealed Enclosure with Your Subwoofer Purchase!

Save 5% when you add a Belva MDFS1215 Sealed Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

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50% Off Sealed Enclosure with Your Subwoofer Purchase!

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Save 35% on a Sealed Enclosure with Your Subwoofer Purchase!

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Save 35% on a Sealed Enclosure with Your Subwoofer Purchase!

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

Save 35% on a Sealed Enclosure with Your Subwoofer Purchase!

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Save 20% on a Sealed Enclosure with Your Subwoofer Purchase!

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

50% Off Speaker Wire with Enclosure Purchase

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Belva BBSW127

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

(Offer 1 of 31)

Combined Total Price

$399.95

You Save $39.99

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

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
80%
4 Star
18%
3 Star
3%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.9
Features
4.6
Design
4.8
Usability
5.0

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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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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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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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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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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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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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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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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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.

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Conroe, Texas

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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.

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Topeka, KS

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Value
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Design
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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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Farmington, CT

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Value
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Design
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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.

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Dallas, Tx

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Value
Features
Design
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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!

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Riverside, CA

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Value
Features
Design
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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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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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Bremerton, WA

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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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Eastern, PA

Overall
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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!!!

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Rochester, MN

Overall
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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

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Newnan, GA

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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.

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Huntsville, AL

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Overall
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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.

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fayetteville, TN

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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.

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Westlake Village, CA

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Value
Features
Design
Usability
Good box

August 20, 2015

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

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Colfax, Wa

Overall
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Value
Features
Design
Usability
Awesome, Crisp, Clear

August 4, 2018

This box pairs with my Alpine R 12D4 sound great. The box sounds clear and crisp. No distortion and build quality is excellent.

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Seattle, WA

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
What's "budget" about it?

March 29, 2018

Great sealed enclosure, and the poly lining is a nice touch. No leaks. The carpet is darker (blacker?) than most automotive-grey boxes. Didn't strip any screws during install. The nameplate (on the front! they're really proud of it) is a little obnoxious and attaches with small screws, which may create a leak, so I took the plate off and put the screws back in their holes. Terminal binding posts are what you'd expect and were tight. Overall just what you'd expect for a carpeted, sealed enclosure at a great price.

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Oxford,MS

Overall
Durability
Value
Features
Design
Usability
Can’t beat this

March 17, 2018

Great box for a steal of a price. Haven’t noticed any leaks and Sonic got it to me super fast!

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Dayton, Ohio

Overall
Durability
Value
Features
Design
Usability
Good

March 17, 2018

Well built box, very fast shipping! Good for deeper subwoofers.

0 of 0 found this helpful

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western Kentucky

Overall
Durability
Value
Features
Design
Usability
very satisfied with this enclosure

March 16, 2018

i usually build my own enclosures, however this deal was too good to pass up on, especially since it was exactly the volume that i needed. buying instead of building was a huge time saver for me and i didn't have to clean saw dust off of everything in my garage. i would not hesitate to buy another Belva enclosure again. great product ! ! !

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Horn Lake, Ms

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Great value and built well

February 27, 2018

This is the third one of these enclosures I have purchased from Sonic Electronix and all three have arrived quick and packaged well. Would not hesitate to buy another and I consider the Belva line of prefab boxes a "best buy" in each class whether it be ported or sealed.

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Horn Lake, Ms

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Good prefab box

February 27, 2018

Purchased this box for a home subwoofer and have no regrets. If you need a sealed box with this internal airspace I don't think you will be disappointed. Great cost effective sealed box and of course with Sonic Electronix you get lightning fast shipping.

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Lilburn, GA

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Great for deep low hard hitting bass

November 9, 2017

These boxes are built extremely well and hit very hard. If you want to hit those low window breaking notes these can take it. I have 4 of them and have never had one problem.

0 of 0 found this helpful

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Sarasota, FL

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Overall
Durability
Value
Features
Design
Usability
Excellent Pre-fab. box! (12" Champion Pioneer sub.)

November 2, 2017

Made very well and sturdy with true spec. high quality wood. Nice gold plated terminals and the inside is truly lined with poly-fli, glued securely, solidly sealed with no leaks. Does have a logo screwed to the front which at first I didn't like but has grown on me. I have attached my sub. amp to the back of the box and has held up very well. I trust in the build and plan on attaching another small amp to the top of the box as well. Fit almost perfect for a 12" Pioneer Champion sub (I suggest lining the front and inside wall with gasket tape for a more sung fit). I un-screwed the speaker terminals and put a little gasket tape around it to seal it better to the box. Highly recommend this box. Feels like you could drop it and would still hold up.

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Colorado

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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.

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plymouth, MN

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Overall
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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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Franklin, IN

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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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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!!!

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Tucson,az

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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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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.

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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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Woodruff sc

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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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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.

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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

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 $39.99

NVX XKIT02 - True Spec 1/0 Gauge Amp Kit

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

Your Price $134.99

Scosche WGB12

12" Protective Waffle Style Subwoofer Grille

Your Price $8.00

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 $45.99

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 $177.99

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

40 ft. Bulk Pack of Sound Dampening Material

Your Price $99.95

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 $287.99

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 $11.99

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 $11.99

Site : 247 Sonic Electronix is disabled.

Product Summary

Manufacturer

Model Number

MDFS1215

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)

$39.99

Keep Shopping

NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

$59.99

Add
Scosche WGB12

12" Protective Waffle Style Subwoofer Grille

$8.00

Add
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.

$45.99

Add

Don't see the accessory you're looking for?
View all available accessories for the 1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS1215).