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CAUTION
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CAUTION
!!
CAUTION
SUBWOOFER: 8IB4 10IB4 12IB4
Free Air Resonance (Fs): 37.5 Hz 37.5 Hz 40.5 Hz
Electrical “Q” (Qes): 0.744 0.837 0.673
Mechanical “Q” (Qms): 8.484 9.400 10.967
Total Speaker “Q” (Qts): 0.684 0.769 0.634
Equiv. Compliance (Vas): 1.80 ft³
2.93 ft³
3.97 ft³
51.0 litres 83.0 litres 112.4 litres
One-way, Linear Excursion: 0.34 in 0.30 in 0.29 in
(Xmax)* 8.6 mm 7.6 mm 7.3 mm
Efficiency (1W/1m)**: 87.4 dB 89.0 dB 92.2 dB
Effective Piston Area (Sd): 30.7 in²
51.8 in²
78.5 in²
0.0198 m²
0.0334 m²
0.0506 m²
DC Resistance (Re): 6.10Ω 7.20Ω 6.07Ω
Nominal Impedance: 8Ω 8Ω 8Ω
Power Handling (continuous): 75W 100W 125W
Mounting Depth: 3.875 in 5.2 in 5.5 in
98 mm 132 mm 140 mm
Mounting Hole Diameter: 7.0 in 9.125 in 11.0625 in
178 mm 232 mm 281 mm
Driver Displacement: 0.03 ft³
0.05 ft³
0.06 ft³
0.792 litres 1.414 litres 1.696 litres
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.
AMPLIFIER
AMPLIFIER
AMPLIFIER
IB4
8.0
4.0
2.7
WIRING OPTIONS
2 JL AUDIO IB4
*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”.
SUBWOOFER SPECIFICATIONS
CAUTION
!!
CAUTION
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IMPORTANT
This woofer is specifically designed for infinite baffle installation. It may be used in a large sealed enclosure of at least 8 cubic feet if necessary. This woofer is not well suited for ported or bandpass applications.