JL Audio 10IB4, 12IB4, 8IB4 User Manual

8IB4 10IB4 12IB4

Subwoofers

owner’s manual

Congratulations on your purchase of a JL Audio subwoofer component. Your JL Audio subwoofer is a

precision loudspeaker which has been engineered to produce the highest quality sub-bass performance in

your vehicle. Authorized JL Audio dealers have extensive technical information about your new speaker.

CAUTION

AMPLIFIER

IB4

8.0

4.0

2.7

SUBWOOFER SPECIFICATIONS

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

*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”.

WIRING OPTIONS

This woofer is specifically designed for infinite baffle installation. It may be used in a lar ge sealed enclosure of at least 8 cubic feet if necessary. This woofer is not well suited for ported or bandpass applications.

IMPORTANT

CAUTION

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 preser ve your ability to enjoy its fidelity.

2 JL AUDIO IB4

+ 2 hidden pages