JL Audio 12TW1-4
12" (30cm) subwoofer
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Description
Discover the 12TW1-4, a powerful 12" (30cm) subwoofer from the renowned brand JL Audio. This subwoofer, based on the patented Thin-Line subwoofer technology, is characterized by a low installation depth and high excursion capability. Its powerful combination makes it compatible with extremely small enclosures, while still delivering outstanding sound and bass. The 12TW1-4 also features a unique design that requires minimal frontal distance for driver excursion. Despite its compact size, it does not compromise sound quality and delivers the rich, deep and controlled bass you expect from a JL Audio subwoofer system.
Features
- The 12TW1, based on JL Audio's patented Thin Line subwoofer technology, offers a powerful combination of shallow depth and high excursion while operating in insanely small enclosures (0.65 cu.ft. / 18.4 liters).
- In combination with a frame made of a special cast alloy, the 12TW1 is able to work in extremely tight volumes.
- JL Audio's patented thin-line woofer technology compresses the architecture of the 12TW1 through a "concentric tube" structure built into the injection-molded cone body. This structure supports the voice coil and a fully annular spider while allowing a large motor structure to be placed further forward in the speaker than conventional designs.
- The 12TW1 also features an ingenious frame design that minimizes the frontal distance required for driver excursion. This is achieved by recessing the suspension mounting surface so that most of the frontal excursion occurs within the frame dimensions. Thanks to this feature, the 12TW1 requires only 22 mm (0.87 inches) of frontal clearance, even with the grille in place. This allows for more efficient use of space and a larger enclosure volume within a given overall depth.
- Although the 12TW1 is optimized for an enclosure that's much smaller than any other JL Audio 12-inch subwoofer, it never sounds like a big woofer struggling in a tiny box... Instead, it delivers all the rich, deep and controlled bass you've come to expect from a JL Audio subwoofer system.
- Very shallow installation depth (117 mm / 4.62 inches)
- Extremely small requirements for the volume of the sealed housing
- Long linear deflection (0.40 in / 10 mm, one-way linear deflection)
- DMA-optimized engine design
- Patented "concentric tube" architecture
- Cast alloy frame with flat edges for a narrow chassis arrangement
- Cone made of injection-molded, mica-filled polypropylene
- Rubber surround
- Steel grille included with every driver
- Precision engineered in the USA at the JL Audio factory in Miramar, Florida, with global components
General specifications
- Continuous load capacity (RMS) : 300 W
- Recommended amplifier power (RMS) : 75 - 300 W
- Nominal impedance (Znom) : 4 Ω
- Protective grille optionally available
Dimensions
- Nominal diameter: 300 mm / 12.0 inch
- Overall diameter (A): 314 mm / 12.375 inches
- Installation diameter (B) : 281 mm / 11.0625 inch
- Bolt circle diameter (C) : 297 mm / 11.7 inch
- Motor outer diameter (D): 145 mm / 5.71 inches
- Installation depth (E) : 117 mm (4.62 inches)
- Protrusion of the front grille (F) :0.87 in / 22 mm
- Volume displacement : 0.072 cu ft / 2.04 L
- Net weight : 16,5 lb / 7,5 kg
Parameters
- Free air resonance frequency (Fs) : 32.35 Hz
- Electrical "Q" (Qes) : 0.555
- Mechanical "Q" (Qms) : 11.066
- Total quality "Q" (Qts) : 0.529
- Equivalent volume (Vas) : 1.189 cu ft / 33.67 L
- One-way linear deflection (Xmax) : 0.40 inch/10.0 mm
- Efficiency (1 W / 1 m) : 85.15 dB SPL
- Membrane area (Sd) : 0.0436 square meter
- Direct current resistance (Re) : 3.514 Ω
Closed housing specifications
- Wall thickness: 19 mm / 0.75 inch
- Thickness of the front baffle: 19 mm / 0.75 inch
- Volume (net int.) : 0.65 cu ft / 18.41 L
- Outer width (W): 673 mm / 26.50 inches
- Outer height (H) : 356 mm (14 inches)
- Outer depth (D): 140 mm / 5.50 inches
- F3 : 45.44 Hz
- Fc : 54,41 Hz
- Qtc : 0,89
Specifications for bass reflex enclosures
- Wall thickness: 19 mm / 0.75 inch
- Thickness of the front baffle: 19 mm / 0.75 inch
- Volume (net int.) : 1.125 cu ft / 31.86 L
- Outer width (W) : 806 mm (31.75 inches)
- Outer height (H) : 406 mm (16 inch)
- Outer depth (D) : 178 mm / 7 inch
- Internal slot connection width (SW): 140 mm / 5.50 inches
- Internal slot height (SH) : 57 mm / 2.25 inch
- Internal slot connection length (SL): 575 mm (22.625 inches)
- Length of the port extension (EL): 527 mm / 20.75 inches
- Tuning frequency (Fb) : 34.0 Hz
- F3 : 31.79 Hz
