12 INCH SUB BOX ENCLOSURES
Why Choose a 12” Subwoofer Box from Down4Sound?
When you want to feel every note of your bassline, our 12 inch sub boxes deliver. Designed with competition-level airflow and kerf-ported designs, each enclosure maximizes output while keeping your sub safe and responsive. We offer a full range of options—from single 12 inch enclosures to dual setups tuned to 32Hz.
Our PRO-FAB and Team D4S series boxes are CNC-cut from high-grade MDF or premium birch wood, braced for strength, and coated in a durable black bedliner finish. Whether you're building a daily driver or a show car, these enclosures are precision-tuned and pre-tested by the Down4Sound team.
- Kerf-ported for tighter, deeper lows
- Dual & single 12” sub options available
- Built with CNC-cut MDF or birch wood
- Black bedliner finish for durability & style
- Ships fast from our U.S. warehouse
Need help choosing? Ask our team or check our Sub Box Guide to match your subs perfectly. Let the bass drop—with Down4Sound.
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Down4sound PRO-FAB HD3- 2 12 Sub Box | Dual HD 12-Inch KERF Port Subwoofer Enclosure Box
Down4Sound
MSRP: $879.99$699.99Experience Extreme Sound with the PRO-FAB HD3 Dual 2 12 Inch KERF Ported Subwoofer HD Birch Enclosure Are you craving high-performance audio and extreme sound quality? Look no further than Down4sound's PRO-FAB HD3 Dual 12 Inch Ported Subwoofer HD Birch...HD3-2-12KPMSRP: $879.99$699.99 -
Down4sound PRO-FAB HD3 12 | 1 12 Sub Box | Single HD 12-Inch KERF Port Subwoofer Enclosure Box
Down4Sound
MSRP: $799.99$479.99High performance and extreme sound, that's what you can expect from Down4sound's "PRO-FAB HD3" Single 12 Inch Ported Subwoofer HD Birch Enclosure. With a THICK triple baffle design, this enclosure has been specially crafted to handle the planet’s...HD3-1-12KPMSRP: $799.99$479.99 -
Down4sound PRO-FAB v2 2 12 | 2 12 Sub Box | Dual 12-Inch KERF Port Subwoofer Enclosure Box
Down4Sound
MSRP: $499.99$299.99Dual 12 Inch KERF-Port Sub Box Enclosure - Down4sound PRO-FAB V2 KERF 2-12 Enhance Your Car Audio System with the PROFAB V2 KERF PORT Subwoofer Enclosure Discover the ultimate addition to elevate your car audio system's sound quality – the...DUAL- BB-Kerf 12 Team D4S BOXMSRP: $499.99$299.99 -
Down4sound PRO-FAB v2 12 | 1 12 Sub Box | Single 12-Inch KERF Port Subwoofer Enclosure Box
Down4Sound
MSRP: $399.99$199.99Single 12 Inch KERF-Port Sub Box Enclosure - Down4sound PRO-FAB V2 KERF 1-12 NEW v2 Prefab aka PROFAB single 12 kerf ported sub box enclosure is made from top-of-the-line materials that are designed to withstand even the most intense vibrations...Single- BB-Kerf 12 Team D4S BOXMSRP: $399.99$199.99 -
Down4sound PRO-FAB 12 | 2 12 Sub Box | Dual 12-Inch Ported Subwoofer Enclosure Box
Down4Sound
MSRP: $399.99$299.99Down4sound Dual 12 Inch Ported PROFAB Sub box Enclosure (2 - 12): Down4sound PRO-FAB 12 | 2 12 Sub Box | Dual 12-Inch Ported Subwoofer Enclosure Box Looking for a sub box to enhance your car audio system? Look no further than our selection of 12...TD4S-PFB-D12MSRP: $399.99$299.99 -
Down4sound PRO-FAB 12 | 12 Sub Box | Single 12-Inch Ported Subwoofer Enclosure Box
Down4Sound
MSRP: $289.99$199.99Single 12 Inch Ported Sub box Enclosure (1 - 12) Down4sound PRO-FAB 12 Get the most Powerful Bass available in a prefab 12-Inch Ported Sub Box. Upgrade your car audio system with the Single 12 Inch Ported Sub box Enclosure from Down4sound PRO-FAB. This...TD4S-PFB-S12MSRP: $289.99$199.99Qty in Cart: 0Quantity:Price:MSRP: $289.99$199.99Subtotal: