2 JL AUDIO 15W3/18W3
SUBWOOFER: 15W3-D2 15W3-D4 18W3-D2 18W3-D4
Free Air Resonance (Fs): 21.3 Hz 21.8 Hz 19.0 Hz 19.7 Hz
Electrical “Q” (Qes): 0.4559 0.4302 0.4079 0.456
Mechanical “Q” (Qms): 8.854 8.854 8.7578 8.0183
Total Speaker “Q” (Qts): 0.434 0.41 0.39 0.432
Equiv. Compliance (Vas): 8.42 ft
3
8.42 ft
3
13.339 ft
3
13.339 ft
3
238.5 litres 238.5 litres 377.1 litres 377.1 litres
One-way, Linear Excursion: 0.675 in 0.675 in 0.500 in 0.500 in
(Xmax)* 17.1 mm 17.1 mm 12.7 mm 12.7 mm
Efficiency (1W/1m)**: 88.8 dB 89.4 dB 89.8 dB 89.8 dB
Effective Piston Area (Sd): 127.5 in
2
127.5 in
2
186.1 in
2
186.1 in
2
0.0823 m
2
0.0823 m
2
0.12009 m
2
0.12009 m
2
DC Resistance (Re)***: 3.34Ω 6.66Ω 3.36Ω 6.54Ω
Nominal Impedance: Dual 2Ω Dual 4Ω Dual 2Ω Dual 4Ω
Power Handling (continuous): 400W 400W 500W 500W
Mounting Depth: 8.125 in 8.125 in 9.0625 in 9.0625 in
206 mm 206 mm 230 mm 230 mm
Mounting Hole Diameter: 13.875 in 13.875 in 16.5 in 16.5 in
352 mm 352 mm 419 mm 419 mm
Driver Displacement: 0.140 ft
3
0.140 ft
3
0.20 ft
3
0.20 ft
3
3.9 litres 3.9 litres 5.6 litres 5.6 litres
*Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied. **Efficiency (1W/1m) 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”. ***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.
SUBWOOFER SPECIFICATIONS
WIRING OPTIONS
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