About the SPL Boxes SB212SV
We all know how a good subwoofer can enhance your musical enjoyment, but not everyone wants to build their own box. SPL Boxes to the rescue! These heavy-duty enclosures can take the punishment of the car environment, with rugged 3/4" MDF construction and a 1" front panel to give your sub added support. Attractive and tough charcoal carpet protects the box from nicks and dings, while gold-tipped spring terminals hold your speaker wires securely. This SB212SV box holds two 12" subs in a ported enclosure.
Product highlights:
- ported enclosure for two 12" subwoofers
- 3/4" MDF construction with 1" front panel
- gray carpet covering
- internal volume: 1.6 cubic feet per chamber
- cutout diameter: 11.14"
- dimensions: 36.125"W x 13.375"H x 15.875"D
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # SB212SV
What's in the box:
- Ported enclosure for two 12" subwoofers
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More details on the SPL Boxes SB212SV

Features & specs
General | ||
---|---|---|
Box Type | Ported | |
Number of Boxes | 1 | |
Number of Speakers Per Box | 2 | |
Speaker Size | 12 | |
Cutout Diameter or Length (inches) | 11 3/16 | |
Maximum Speaker Depth (inches) | 12-1/16 | |
Box Volume (cubic feet) | 3.2 | |
Tuning Frequency | 39 Hz | |
Height (inches) | 13-3/8 | |
Width (inches) | 36-1/8 | |
Depth (inches) | 15-7/8 | |
Second Depth (inches) | 15-7/8 | |
Wood Thickness (inches) | 3/4 | |
Speaker Wire Connectors | Spring posts | |
Box Color | Charcoal Gray | |
Box Finish | Carpet | |
Parts Warranty | 1 Year | |
Labor Warranty | 1 Year |
Product Research
Features
Design: The SB212SV is an unloaded, ported enclosure for two 12" subwoofers. It's constructed of ¾" MDF (medium-density fiberboard) with a 1" MDF front baffle and covered in charcoal colored carpet.
Internal Box Volume: The enclosure has two separate chambers, each with a volume of 1.6 ft³. The tuning frequency is 39 Hz. While each sub has its own chamber, there is only one exterior port opening, and the subs share the last 13¾" of port length.
Terminals: The wire terminals are spring-posts (two pair) mounted on the back of the enclosure. The spring terminals will accept pin connectors and bare wire up to 12-gauge. Inside the enclosure there are 0.205" male quick-slides (will accept 0.205" female quick slides) for both the positive and negative terminals. The wire can also be attached using the nuts holding the quick-slides in place.
Note: Speaker wire is needed to connect the terminals to the subwoofers.
Brackets: Brackets for securing the enclosure in your vehicle are recommended.
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