JL Audio


JL Audio 12TW3-D4 12 Inch TW3 Series Shallow Mount Subwoofer Dual 4 ohm 400w RMS

JL Audio 12TW3-D4 12 Inch TW3 Series Shallow Mount Subwoofer Dual 4 ohm 400w RMS

12TW3-D4 Shallow Mount

12-inch (300 mm) Subwoofer Driver, Dual 4 Ω


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Product Information

TW3 12-inch Subwoofer (400 W, dual 4 Ω voice coils)

Building on the core technology of our TW5 thin-line subwoofers, the TW3’s deliver a powerful combination of shallow mounting depth and excursion capability. In fact, they are capable of greater excursion than the W3v3’s.

To allow this remarkable feat to be achieved, JL Audio’s patented thin-line woofer technology compresses the architecture of the TW3’s using a “concentric tube” structure built into the injection-molded cone body. This structure supports the voice coil and a full annular spider, while permitting the placement of the large motor structure further forward in the speaker than with conventional designs.

TW3’s are optimized for small enclosures and offer our tab-ear mounting design to maximize cone area within their mounting footprints. We know you’re going to love working with these amazing Subwoofers.

Deep, powerful and accurate JL Audio bass is now possible in more applications than ever.

  • Very shallow mounting depth (3.25 / 3.50 Inches)
  • No pole vent: permits mounting close to rear wall of enclosure.
  • Very small sealed enclosure volume requirements
  • Very long linear excursion capability (0.60 In / 15.2 mm, one-way)
  • DMA-optimized motor designs
  • “concentric tube” architecture
  • Patented “floating cone attach method” technology
  • Cast alloy frame
  • Injection molded, mica-filled polypropylene cone
  • Rubber surround
  • Aluminum-alloy dust cap and rear cap with JL Audio logo
  • Precision-built in USA at JL Audio’s Miramar, Florida factory with global components


  • Continuous Power Handling (RMS)    400 W
  • Recommended Amplifier Power (RMS)    200 - 400 W
  • Nominal Impedance (Znom)    Dual 4 Ω
  • 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
  • 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.

** For parallel-wired voice coils, divide "Re" by 4. All other specifications remain the same.

*** Re (DC resistance) is measured with the voice coils in series, for parallel-wired specification divide Re by 4. All other specifications remain the same.

What's Included

  • 12TW3-D4
  • Warranty information
  • JL Audio stickers

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