12TW3-D4 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

General Specifications

• Continuous Power Handling (RMS) 400W
• Recommended Amplifier Power (RMS) 200 - 400W
• 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
• 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.

Sealed Enclosure Specifications

Please Note: Illustration may not be to scale

• Wall Thickness 0.75 in / 19 mm
• Front Baffle Thickness 0.75 in / 19 mm
• Volume (net int.) 0.80 cu ft / 22.7 L
• External Width (W) 21.25 in / 540 mm
• External Height (H) 16 in / 406 mm
• External Depth (D) 6.5 in / 165 mm
• F3 37.99 Hz
• Fc 46.97 Hz
• Qtc 0.9426

Enclosure Notes

• The enclosure recommendations listed above are external dimensions which assume the use of 0.75 in (19 mm) thick material. If you are using 0.625 in (16 mm) thick material, subtract 0.25 in (6.5 mm) from each dimension. Do not use any material with a thickness of less than 0.625 in (16 mm) as this may compromise the rigidity of the enclosure.
• All enclosure volumes listed above are net internal volumes! Driver displacement, port displacement and brace displacement must be added to obtain the final gross internal volume. All enclosure dimensions above have already taken this into account.
• When using multiple subwoofers in a common enclosure you will need to recalculate the enclosure and port dimensions. For assistance please contact your authorized JL Audio dealer or JL Audio Technical Support.
• We recommend the use of this speaker in a bi-amplified system using high-quality satellite speakers and a high-quality amplifier. We do not recommend the use of this subwoofer with a passive crossover (coil), as this type of device will adversely affect performance.
• All specifications are subject to change without notice.

Ported Enclosure Specifications

Please Note: Illustration may not be to scale

• Wall Thickness 0.75 in / 19 mm
• Front Baffle Thickness 0.75 in / 19 mm
• Volume (net int.) 0.95 cu ft / 26.9 L
• External Width (W) 30 in / 762 mm
• External Height (H) 16.625 in / 422 mm
• External Depth (D) 6.50 in / 165 mm
• Internal Slot Port Width (SW) 5 in / 127 mm
• Internal Slot Port Height (SH) 2.50 in / 64 mm
• Internal Slot Port Length (SL) 31.25 in / 794 mm
• Port Extension Length (PL) 26 in / 660 mm
• Tuning Frequency (Fb) 32.14 Hz
• F3 32.52 Hz

Safety Notice

Prolonged exposure to sound pressure levels in excess of 100dB can cause permanent hearing loss. This high-performance speaker can exceed this level. Please exercise restraint in its operation in order to preserve your ability to enjoy its fidelity.

When installing a subwoofer in your vehicle, it is extremely important to secure the enclosure firmly. We recommend bolting the enclosure through the metal of the floorpan or the frame of the vehicle with large diameter washers for reinforcement. If an enclosure is not firmly attached, it can become a projectile in a collision. This is particularly important in a hatchback, station wagon, sports utility vehicle, or van.