Bass for challenging spaces

If you’ve got a pickup truck, sports car, or you just need to haul a lot of stuff, then you know that adding some bass can be a challenge. That’s why JL Audio built the TW3 Series 10TW3-D4 shallow-mount subwoofer. This super-thin 10″ sub puts out big bass, yet only requires minimum air space, so you can use a much smaller enclosure. Now, you can have your bass and your space too.

Don’t let this sub’s low profile fool you, it’s made for big bass.

JL Audio’s amazing engineering

JL Audio used all their tricks to build a sub this slender without giving up performance. Its tough polypropylene cone won’t flex under high power, and the large, durable rubber surround helps the cone move large amounts of air. The heavy-duty cast-alloy frame only stands 3-1/4″ tall, but provides a stable home for this high-performance bass driver. For best results, you’ll want to send this sub up to 400 watts RMS, and the dual 4-ohm voice coils make it a perfect match for a mono amplifier. 


jl-audio_10tw3-d4_02 Thin-Line Design: JL Audio’s patented thin-line woofer technology compresses the architecture of the 10TW3-D4 subwoofer and allows it to deliver great bass performance in tight space applications (less than 3-1/4″ deep). Central to the technology is the Concentric Tube structure that supports the oversized voice coil and the suspension attachments. This permits placing the motor structure much further forward in the speaker than conventional designs, while maintaining excellent linear excursion capability. Equally important, the 10TW3-D4 is designed for extremely small enclosure applications; 0.519 ft³ is optimum.

Concentric Tube Suspension: JL Audio’s patented Concentric Tube Suspension employs a molded structure which spans beyond the edge of the motor structure, supporting the spider on the outside of the motor’s boundaries and the large diameter voice coil on the inside. The large voice coil permits the magnet to sit inside it, rather than surrounding the coil as is typical in most woofers. The concentric tube structure and the elimination of a conventional top-plate helps JL Audio place the motor higher up into the cone body’s space to further compress depth, while still permitting excellent mechanical excursion.

Mica-Filled Polypropylene Woofer: The subwoofer features an injection-molded, mica-filled polypropylene cone woofer with a rubber surround for added durability, woofer excursion and bass response.

Dynamic Motor Analysis (DMA): DMA is JL Audio’s proprietary method of improving dynamic motor behavior. As a result of DMA optimization, the 10TW3-D4 motor remains linear over a long excursion range, and also maintains a stable fixed magnetic field in the gap over a wide power range. The result is reduced distortion, faithfully reproduced transients, and tight, clean, articulate bass.

Floating Cone Attachment Method (FCAM): JL Audio’s patented FCAM technology is an innovative method of bonding the surround/cone assembly to the voice coil/spider assembly. This assembly technique ensures proper surround geometry in the assembled speaker for better excursion control and dynamic voice coil alignment.


Size 10 -inch
Impedance 4 ohms
Cone Material Mica-filled IMPP
Surround Material Rubber
Free-Air No
Dual Voice Coil Yes
Sensitivity 82.1 dB at 1 watt 
Frequency Response 24 – 200 Hz
RMS Power Range (Watts) 100-400
Peak Power Handling (Watts) 800
Top Mount Depth (inches) 3 1/4
Bottom Mount Depth (inches) N/A
Cutout Diameter or Length (inches) 9 9/16
Vas (liters) 19.82
Fs (Hz) 32.3
Qts 0.62
Xmax (millimeters) 15.2