JL AUDIO 10TW1-4 - 25cm Subwoofer

10TW1-4
TW1 10-inch Subwoofer Driver (300 W, 4 ohms)

The TW1 subwoofer drivers offer a powerful combination of shallow mounting depth, minimal frontal clearance and extremely small enclosure requirements, making them an outstanding choice for tight-space, moderate power applications. JL Audio‘s Patented Concentric Tube suspension technology delivers outstanding excursion capability to extract maximum performance potential. This is accomplished by recessing the suspension attachment surface, so that most of the forward excursion occurs within the frame‘s dimensions. TW1‘s are built in Miramar, Florida, USA for those seeking truly exceptional bass quality and impact.

• Very shallow mounting depth (4.36 in / 111 mm)
• No pole vent:permits mounting close to rear wall of enclosure
• Extremely small sealed enclosure volume requirements
• Long linear excursion capability (0.40 in / 10 mm, one-way)
• DMA-optimized motor design
• Patented „concentric tube“ architecture
• Patented „floating cone attach method“ technology
• Cast alloy frame with flat edges for tight driver grouping
• Injection molded, mica-filled polypropylene cone
• Rubber surround
• Steel mesh grille included with each driver
• Precision-built in USA at JL Audio‘s Miramar, Florida factory

General Specifications

• Continuous Power Handling (RMS): 300 W
• Recommended Amplifier Power (RMS): 75 - 300 W
• Nominal Impedance (Znom): 4 ohms

Physical Specifications (Pict. 4)

• Nominal Diameter: 10.0 in / 250 mm
• Overall Diameter (A): 10.375 in / 264 mm
• Mounting Hole Diameter (B): 9.0625 in / 230 mm
• Bolt Hole Circle Diameter (C): 9.7 in / 246 mm
• Motor Outer Diameter (D): 4.54 in / 115 mm
• Mounting Depth (E): 4.36 in / 111 mm
• Front Grille Protrusion (F): 0.87 in / 22 mm
• Driver Displacement: 0.047 cu ft / 1.33 L
• Net Weight: 10.5 lb / 4.8 kg

Parameters

• Free Air Resonance (Fs): 38.09 Hz
• Electrical “Q” (Qes): 0.639
• Mechanical “Q” (Qms): 10.07
• Total Speaker “Q” (Qts): 0.601
• Equivalent Compliance (Vas): 0.429 cu ft / 12.15 L
• One-Way Linear Excursion (Xmax)*: 0.40 in / 10.0 mm
• Efficiency (1 W / 1 m)**: 82.2 dB SPL
• Effective Piston Area (Sd): 41.602 sq in / 0.0268 sq m
• DC Resistance (Re): 3.516 ohms

* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied.
** Efficiency (1 W / 1 m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is “louder”.

Sealed Enclosure Specifications (Pict. 5)

• Wall Thickness: 0.75 in / 19 mm
• Front Baffle Thickness: 0.75 in / 19 mm
• Volume (net int.): 0.35 cu ft / 9.91 L
• External Width (W): 16.125 in / 410 mm
• External Height (H): 14 in / 356 mm
• External Depth (D): 5.25 in / 133 mm
• F3: 47.24 Hz
• Fc: 56.83 Hz
• Qtc: 0.897

Ported Enclosure Specifications (Pict.6)

• Wall Thickness: 0.75 in / 19 mm

• Front Baffle Thickness: 0.75 in / 19 mm

• Volume (net int.): 0.625 cu ft / 17.7 L

• External Width (W): 26.625 in / 676 mm

• External Height (H): 16 in / 406 mm

• External Depth (D): 5.25 in / 133 mm

• Internal Slot Port Width (SW): 3.75 in / 95 mm

• Internal Slot Port Height (SH): 1.875 in / 48 mm

• Internal Slot Port Length (SL): 22.50 in / 572 mm

• Port Extension Length (EL): 20.8125 in / 529 mm

• Tuning Frequency (Fb): 35.0 Hz

• F3: 30.77 Hz

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.

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.