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JL Audio 12TW3-D4 12" 400w Car Subwoofer
JL Audio 12" Slim SUB 400 RMS 4Ω
( JL Audio 12TW3D4 )
- Australian JL Audio Warranty
- Purchase Guarantee (see T&C's)
- JL Audio 12" Slim Subwoofer
- 400W RMS at 4Ω
- Deep, tight bass
- Ultra-shallow design
Overview
The JL Audio 12" Slim Subwoofer (400W RMS, 4Ω) combines exceptional bass performance with a compact, shallow-mount design. Built on JL’s patented Thin-Line concentric tube technology, it delivers deep, accurate, and powerful bass while maintaining minimal mounting depth. Its DMA-optimized motor system ensures long, linear excursion with low distortion, providing clean, dynamic sound even in tight spaces. Optimized for small sealed enclosures, it features a durable cast alloy frame, rubber surround, and injection-molded mica-filled polypropylene cone. Precision-built in JL Audio’s Miramar, Florida factory, the 12TW3 offers world-class performance, reliability, and installation flexibility for depth-challenged vehicles and compact audio systems.
Key Features:
12-Inch Slim Subwoofer
Delivers deep, powerful, and accurate bass from an ultra-shallow design ideal for space-limited systems.
Power Handling
Rated 400 W RMS at 4 Ω (dual 4 Ω voice coils), providing high-output, clean performance with flexible wiring options.
Thin-Line & Concentric Tube Technology
Built on JL Audio’s Thin-Line platform with a concentric-tube cone structure that compresses depth while supporting long linear excursion.
Very Shallow Mounting Depth
Designed for ultra-shallow installations (≈3.25–3.50 inches), permitting mounting close to enclosure rear walls and tight factory locations.
High Excursion Capability
Very long linear excursion (0.60 in / 15.2 mm one-way) for increased output and dynamic bass from extremely small enclosures.
Optimized Motor & Design
DMA-optimized motor designs, patented floating-cone-attach method, and no pole vent for reliable, low-distortion operation.
Durable Construction
Cast alloy frame, injection-molded mica-filled polypropylene cone, rubber surround, and aluminum-alloy dust/rear caps for long-lasting performance.
Small Enclosure Friendly
Very small sealed enclosure requirements and excellent performance in compact sealed or ported installs—ideal for depth-challenged vehicles.
Precision-Built in USA
Precision-built at JL Audio’s Miramar, Florida factory using global components for consistent quality and performance.
| General Specifications | |
| Continuous Power Handling (RMS) | 400 W |
| Recommended Amplifier Power (RMS) | 200- 400 W |
| Nominal Impedance (Znom) | Dual 4 Ω |
| Physical Specifications | |
| Nominal Diameter | 12 in / 300 mm |
| Overall Diameter (A) | A1: 13.2 in / 335 mm A2: 12.5 in / 318 mm |
| Mounting Hole Diameter (B) | 11.625 in / 295 mm |
| Bolt Hole Circle Diameter (C) | 12.5 in / 318 mm |
| Motor Outer Diameter (D) | 6.125 in / 156 mm |
| Mounting Depth (E) | 3.5 in / 89 mm |
| Driver Displacement | 0.029 cu ft / 0.82 L |
| Net Weight | 14.9 lb / 6.8 kg |
| Parameters | |
| Free Air Resonance (Fs) | 26.46 Hz |
| Electrical “Q” (Qes) | 0.558 |
| Mechanical “Q” (Qms) | 10.766 |
| Total Speaker “Q” (Qts) | 0.531 |
| Equivalent Compliance (Vas) | 1.72 cu ft / 48.73 L |
| One-Way Linear Excursion (Xmax)* | 0.6 in / 15.2 mm |
| Reference Efficiency (no) | |
| Efficiency (1 W / 1 m)** | 84.11 dB SPL |
| Effective Piston Area (Sd) | 83.517 sq in / 0.0539 sq m |
| DC Resistance (Re)*** | 9.280 Ω |
|
* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied. |
|
- 1 x JL Audio 12" Slim SUB 400 RMS 4Ω
Peace of Mind Purchase Guarantee
This product is supplied via JL Audio Australia and enjoys the FULL benefits of the 'Genuine JL Audio Australian Warranty'. (You may also be entitled to other consumer warranties as provided by the Australian Consumer Guarantee and these entitlements are not limited by this warranty). In the event that this product should fail please contact our service department or you can speak with JL Audio Australia directly.
We are a FULLY AUTHORISED Australian retailer for JL Audio Australia.
Disclaimer
Due to differing operating costs associated with selling products via different marketplaces, our pricing may vary.
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