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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.0 cu ft airspace 12SQTC)

In Stock
|

List price $59.99

$34.99

with warranty

You Save: $25.00 (41.67%)

Arrives by Tuesday, Aug. 5 to zip 20147

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Within the US 48

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Warranty assistance for a year

In Stock

Arrives by Tue, Aug. 5

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Bundled Savings with this Product

Save 20% on a Trunk Sound Deadening Kit!

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

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• Butyl-Based Material

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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JL Audio 12W6v3-D4

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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JBL W12GTi-MkII

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Kicker 40CWD124 (CompD124)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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JL Audio 12W1v3-2

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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SKAR Audio VVX-12V2 D4

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SKAR Audio VVX-12 V2 D2

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Sony XS-GTR121L

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Rockford Fosgate P3D4-12 (Newest Model)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Earthquake Sound TNT-12S

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

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3.50

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$59.99

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$64.95

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$34.99

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$54.99

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$34.99

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$64.99

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$59.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$39.99

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$29.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$64.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$59.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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3.50

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$59.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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3.50

64264

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Kicker 40CWD122 (CompD122)

$99.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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3.50

37709

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$39.99

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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3.50

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MB Quart OWC304

$29.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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$39.99

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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Rockford Fosgate P1S2-12

$65.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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JL Audio 12W0v3-4

$118.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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Boss NX120DVC

$69.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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MTX 3512-02

$89.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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Massive Audio Kilo 122

$129.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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Pyramid WX120X

$29.99

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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Rockford Fosgate R2SD2-12

$64.95

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

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27195

503

Precision Power PPI A.12SQ

$59.99

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$34.99

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3.50

68814

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Power Acoustik CW2-124

$64.95

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$34.99

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68820

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Power Acoustik REP-12

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$34.99

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44127

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Boss AR12D

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44468

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MB Quart PS3-302

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23662

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Precision Power PPI PC.12

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68769

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Precision Power BI.124

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38340

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Precision Power PPI PC.124

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68886

503

JVC CS-G1210

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72379

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Alpine SWA-12S4

$51.95

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$34.99

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45522

503

Alpine SWR-12D2

$159.95

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45530

503

Alpine SWS-12D2

$94.99

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$34.99

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45529

503

Alpine SWS-12D4

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$34.99

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74610

503

Pioneer TS-W3003D4

$79.99

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$34.99

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33523

503

Power Acoustik MOFO-124X

$115.95

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$34.99

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42404

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NVX NSW124

$59.99

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40346

502

Pioneer TS-W304R

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21931

502

Kicker C124 (10C124)

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67943

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Hifonics BRX12D4

$89.99

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41263

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JL Audio 12WXv2-4

$109.95

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60588

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RE Audio REX12S4

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68809

502

Power Acoustik GW3-12

$82.95

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$34.99

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21922

502

Kicker CVT124 (10CVT124)

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43791

502

MTX FPR12-02

$139.95

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$34.99

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68595

502

Cerwin-Vega VEGA3124

$89.99

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67894

502

MB Quart PWM304

$199.00

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38128

502

Earthquake Sound TREMOR-X124

$79.95

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$34.99

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68859

502

Lanzar PRO-HEMID12

$39.95

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$34.99

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69689

502

Clarion WG3020

$49.99

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$34.99

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8.75

68819

502

Power Acoustik RW1-12

$49.99

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$34.99

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38097

502

Earthquake Sound SZ-12

$399.95

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$34.99

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67999

502

Autotek AXL12D4

$29.95

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$34.99

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8.75

68890

502

MTX 5512-22

$129.95

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$34.99

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69799

502

Kenwood KFC-W12DVC

$59.95

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$34.99

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43589

502

Kicker C12D4 (10C12D4)

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$34.99

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67890

502

MB Quart RWM304

$119.99

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8.75

68891

502

MTX 5512-44

$129.95

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40075

502

MTX RTL12-44

$59.95

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20027

502

Infinity Kappa 120.9W

$139.99

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$34.99

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65768

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Planet Audio PX12

$47.99

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$34.99

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68078

502

RE Audio MX 12D2

$399.95

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$34.99

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67965

502

Crunch DRV12D4

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32943

502

MTX Audio T812-44

$149.99

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67941

502

Hifonics HWX12D4

$54.99

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68000

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Autotek ATW12D4

$39.99

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68894

502

MTX 3512-04

$89.95

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44482

502

Hifonics OLM800D2

$159.99

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$34.99

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68768

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Precision Power BI.122

$68.95

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68774

502

Precision Power SN.12

$52.89

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47193

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NVX NSW122

$59.99

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77324

502

RE Audio SCXv2-12d4

$179.99

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64233

502

Kicker 40CWS122 (CompS122)

$99.95

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$34.99

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76889

502

Cerwin-Vega H4124D

$78.95

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76888

502

Cerwin-Vega H4104D

$74.99

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76884

502

Cerwin-Vega V122D

$159.99

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76885

502

Cerwin-Vega V124D

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76890

502

Cerwin-Vega XED12

$54.99

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76872

502

Cerwin-Vega VPRO122D

$259.99

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76873

502

Cerwin-Vega VPRO124D

$259.99

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8.75

45926

502

Sony XS-GS120LD

$74.99

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$34.99

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34.99

21915

301

Kicker CVX122 (10CVX122)

$299.95

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$34.99

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21877

301

Kicker CVR124 (10CVR124)

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

Special Price $0 ($34.99 if purchased separately)

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

FREE Sub Box with select Subwoofers!

Receive a FREE 12" sealed subwoofer enclosure with your purchase!

34.99

76920

301

MB Quart RWM302

$119.99

+

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Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

Special Price $0 ($34.99 if purchased separately)

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

FREE Sub Box with select Subwoofers!

Receive a FREE 12" sealed subwoofer enclosure with your purchase!

34.99

46591

301

NVX VCW102

$179.99

+

100% OFF

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

Special Price $0 ($34.99 if purchased separately)

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

FREE Sub Box with select Subwoofers!

Receive a FREE 12" sealed subwoofer enclosure with your purchase!

34.99

21916

301

Kicker CVX124 (10CVX124)

$299.95

+

100% OFF

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

Special Price $0 ($34.99 if purchased separately)

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

(Offer 1 of 123)

Combined Total Price

$90.98

You Save $14.00

General Features:

  • Single Sealed 12" Enclosure
  • Internal box volume: 1.0 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: 14-1/4"L x 14-1/4"D x 14-1/4"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.
13-1/4"
Total Box Volume
The internal volume measurement in cubic feet before subwoofer magnet displacement.
1.0 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.
1.0 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.
14-1/4"
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.
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

Port Details

Tuning Frequency

Promotions

Promotions
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

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
78%
4 Star
20%
3 Star
2%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
4.9
Features
4.5
Design
4.7
Usability
4.8

Dave

canton ohio

Overall
Durability
Value
Features
Design
Usability

great box

June 24, 2014

Very impressed with the quality of the product for the price

0 of 0 found this helpful

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Robert

Fresno, CA

Overall
Durability
Value
Features
Design
Usability

Belva 1CF 3/4" Sub Box

April 25, 2014

I didn't expect much for the Price. I was Pleasantly Surprised. This Box is Well Made. Extremely Well Made for the Price. The Binding Posts are Gold with Decent Quality. The Box has some Batting inside, though I added about twice as much more to it. You could use Slip On Connectors on the Inside of the Binding Posts, but I chose to Solder. This Box is subjected to Lots of Vibration and I didn't want anything working Loose. The Speaker Opening is a Perfect fit for my Sub. I tried to add Sealing Tape to make it Tighter, but it was already so tight that the Sealing Tape wouldn't fit, so I left it Off. I've been driving around for several weeks now and not a rattle. I'm extremely Surprised and Satisfied with this Sub Box.

0 of 0 found this helpful

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Danny

Gastonia, NC

Overall
Durability
Value
Features
Design
Usability

does its job...

April 4, 2014

Works perfect, the fill inside is thinner than it looked but it works.

0 of 0 found this helpful

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john

abilene texas

Overall
Durability
Value
Features
Design
Usability

good deal

April 3, 2014

overall good deal.nice box well crafted and good looking for the right amount of money.

0 of 0 found this helpful

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Kevin

Rockford, IL

Overall
Durability
Value
Features
Design
Usability

Pretty good for money but...

March 27, 2014

Overall, this enclosure is fantastic and it is a great value if you didn't want to build a custom enclosure like myself, but there is one thing that is wrong in the description... on both sides of the box, the left and right when looking from the front, are recessed 3/4 of an inch, leaving a lip on both sides that is 3/4 of an inch tall, so it changes the internal volume of the box by a small amount, around 0.14 cubic feet. Not a big difference but for some that is a deal breaker. it does come with a small amount of polyfil, enough to cover all 4 solid sides. Otherwise, great buy! Still worth 5 stars in my opinion i just think they need to be more specific with the outside dimensions. Side note: the lip on each side is a nice addition and it adds to the visual aesthetics of the box and also serves as a nice place to mount your amp so it sits a little recessed on the box like I did with my Alpine MRV-500 monoblock amp!

0 of 0 found this helpful

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nukka

pa.

Overall
Durability
Value
Features
Design
Usability

Nice box

March 16, 2014

Sturdy construction, nice carpet, would definitely buy again. If you your looking for a good sealed en closer this is perfect for you.would definitely recommend to my friends.

0 of 0 found this helpful

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Whiteboy

mobile, al.

Overall
Durability
Value
Features
Design
Usability

sub box

February 10, 2014

Very well made box and if you don't have a lot of space this is the box for you. I went from a ported 11/16 box to this 3/4 sealed box the bass is alot deeper and tighter, i am very happy with this box and the price. Tt only took a week to get but it saves you about 50 bucks.

0 of 0 found this helpful

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Raj

bronx, ny

Overall
Durability
Value
Features
Design
Usability

Nice

January 6, 2014

I like everything about the box, except for the terminal connectors. It comes with the screw on ones, I would prefer the spring loaded. But thats something one could live with.

0 of 0 found this helpful

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DaVinci

Sacramento, CA

Overall
Durability
Value
Features
Design
Usability

Very nice

January 5, 2014

I got this as a bundle. I am very happy with it. I prefer closed over open any day.

0 of 0 found this helpful

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sam

Canada

Overall
Durability
Value
Features
Design
Usability

works but..

December 23, 2013

feels bit cheep and i had to glue seams they wiggled a bit

0 of 0 found this helpful

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Martin

Texas

Overall
Durability
Value
Features
Design
Usability

Awesome box for good price!

December 10, 2013

Box is awesome and seller responded fast and quick shipping!

0 of 0 found this helpful

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David

Federal Heights, CO

Overall
Durability
Value
Features
Design
Usability

great box

November 17, 2013

Great box would buy again great build not too big if ya worried about space

0 of 0 found this helpful

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Stephen

Webster, MA

Overall
Durability
Value
Features
Design
Usability

Great quality

November 12, 2013

This is very solid for small price. Great quality enclosure here.

0 of 0 found this helpful

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Lakeman

Delafield, WI

Overall
Durability
Value
Features
Design
Usability

Great Value

October 31, 2013

No buzzing or rattling. Solid construction. Well built for low price.

0 of 0 found this helpful

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box user

el paso texas

Overall
Durability
Value
Features
Design
Usability

Awesome box

October 31, 2013

The box was a great purchase and a great deal. Very happy with my purchase.

0 of 0 found this helpful

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Robert

Manchester, NH

Overall
Durability
Value
Features
Design
Usability

Excellent box

October 24, 2013

Switched to a sealed box for my Alpine Type-X. Much better SQ! Now I can push more power, and have more accurate bass. Box was well built, as described, but contained a minuscule amount of fiber. Not sure how well this affects the box, but I'm happy overall... so it's fairly a minute thing to worry about anyways.

0 of 0 found this helpful

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mike

grand rapids mn

Overall
Durability
Value
Features
Design
Usability

great value great sound

October 14, 2013

Nice box preassembled. All you need is terminals and short piece of speaker wire!! Once sub is muonted if new season it!! Then pound on it !!! Nice tight sound!

0 of 0 found this helpful

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Tony

Stafford, virginia

Overall
Durability
Value
Features
Design
Usability

So far so good!

October 8, 2013

I got this for my rockford P3D4-12. Powered by alpine m-500. Really rocks! I listen to mainly rock and everything sounds fantastic. Build quality of the enclosure is great!

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Mike

Minneapolis, MN

Overall
Durability
Value
Features
Design
Usability

Great box for a great price

October 7, 2013

Very nice box. Extra bonus with the poly fill. Deep black carpet color looks great. 12" sub dropped in perfectly without any sanding. Can't beat the price with free shipping!

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Kelly

Lumberton, MS

Overall
Durability
Value
Features
Design
Usability

Great box

September 27, 2013

I have a power acoustik. Reaper. In this box and it's slams

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

Your Price $89.99

Belva BAK42 - 4 Gauge Amp Kit

CCA 4 Gauge Wiring Kit with RCA & Speaker Wire

Your Price $29.99

8 Gauge - Stinger Amp Kit

Single amplifier 4000 Series complete installation kit.

Your Price $39.99

High-Performance Streetwires Speaker Wire

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

Your Price $44.95

NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

Your Price $7.99

20 ft. of Dynamat Xtreme Trunk Kit

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

Your Price $109.95

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

40 ft. Bulk Pack of Sound Dampening Material

Your Price $119.99

36 ft. of Dynamat Extreme Bulk Pack

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

Your Price $159.95

Banana Clip Terminals

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

Your Price $3.99

Insulated Female Quick Disconnect Connectors

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

Your Price $7.99

12 oz. Can of Adhesive Spray

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

Your Price $6.99

Car Stereo and Speaker / Subwoofer Installation Tool Kit

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

Your Price $12.99

Browse 1 question and 1 answer
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Why did you choose this?
Sonic Electronix Store
Perfect size, great price
Steven F on Jul 29, 2014

Product Summary

Manufacturer

Model Number

MDFS12

UPC

818060010101

Weight

20.00lbs

Internal SKU

mdfs12

Internal Product ID

951

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: Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)