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2 JL AUDIO 12TW3-D4 / 12TW3-D8
JL AUDIO 12TW3-D4 / 12TW3-D8
12TW3 Dual Voice Coil Wiring
Please Note: The TW3 is a dual voice coil driver.
BOTH voice coils must be connected to the amplifier
(in series or parallel) for the speaker to operate
properly. To accomplish this, each TW3 features a pair
of main input connection push-terminals for each
voice coil. Verify that the connections are properly
configured based on these wiring diagrams to
achieve the desired load prior to sending signal to
the subwoofer.
All specifications are subject to change without notice.
* 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 12TW3-D4 12TW3-D8
Free Air Resonance (Fs): 26.460 Hz 32.660 Hz
Electrical “Q” (Qes): 0.558 0.715
Mechanical “Q” (Qms): 10.766 10.071
Total Speaker “Q” (Qts): 0.531 0.668
Equivalent Compliance (Vas):
1.72 ft
3
48.73 litres
1.205 ft
3
34.12 litres
One-way, Linear Excursion
(Xmax)*:
0.60 in
15.2 mm
0.60 in
15.2 mm
Efficiency (1W/1m)**: 84.11 dB SPL 84.23 dB SPL
Effective Piston Area (Sd):
83.517 in
2
0.0539 m
2
83.517 in
2
0.0539 m
2
DC Resistance (Re)***: 9.280 ohm 14.800 ohm
Nominal Impedance:
Dual 4-ohm
voice coils
Dual 8-ohm
voice coils
Power Handling (continuous): 400 W 400 W
12TW3 SUBWOOFER
PHYSICAL SPECIFICATIONS
Nominal Diameter:
12.0 in
300 mm
Overall Major Diameter (A1):
13.2 in.
335 mm
Overall Minor Diameter (A2):
12.5 in
318 mm
Mounting Hole Diameter (B):
11.625 in.
295 mm
Bolt Hole Circle (C):
12.5 in.
318 mm
Magnet Diameter (D):
6.125 in
156 mm
Mounting Depth (E):
3.5 in
89 mm
Net Weight:
14.9 lbs
6.8 Kg
Driver Displacement:
0.029 ft
3
0.82 liters
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
8Ω (D4)
16Ω (D8)
4Ω (D4)
8Ω (D8)
2.7Ω (D4)
5.3Ω (D8)
2Ω (D4)
4Ω (D8)
1Ω (D4)
2Ω (D8)
0.7Ω (D4)
1.3Ω (D8)
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
8Ω (D4)
16Ω (D8)
4Ω (D4)
8Ω (D8)
2.7Ω (D4)
5.3Ω (D8)
2Ω (D4)
4Ω (D8)
1Ω (D4)
2Ω (D8)
0.7Ω (D4)
1.3Ω (D8)
Voice Coils Wired in Series
(Multiple speakers wired in Parallel)
Voice Coils Wired in Parallel
(Multiple speakers wired in Parallel)
A1
B
D
E
C
A2
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