JL Audio 12IB4 Manual de Usario

JL Audio Subwoofer automático 12IB4

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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.

8IB4 10IB4 12IB4

Subwoofers

owner’s manual

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

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

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 por ted or bandpass applications.

JL AUDIO IB4 3

MEDIUM GRAY (MINIMUM):

From a reliability standpoint, this zone

represents a very comfortable operating

power range for each driver. This level of

power will not stress the woofer but will not

extract all of its performance potential, either.

Use of less than the minimum power level

will not damage the woofer, but may result

in unsatisfactory performance.

LIGHT GRAY (OPTIMUM):

This zone represents the best compromise

between long-term reliability, high-output

and low-distortion performance and is

centered on each woofer's continuous

power rating (as published in its

specifications). In this zone, you will be

taking full advantage of the woofer's

optimum, low-distortion performance

range without undue risk of failure.

DARK GRAY (MAXIMUM):

In this zone, low-distortion output and

long-term reliability will be compromised

(especially by an aggressive user). Slightly

more SPL will be gained by pushing the

power into this zone, but typically not more

than 2dB, compared to the light gray zone.

The closer you are to the black zone, the

higher the likelihood of driver failure.

Operate with caution.

BLACK (WARRANTY VOID):

We do not recommend operating

woofers at this level of power. In this zone,

there is a very high probability that the

driver will fail due to excessive heat and/or

mechanical stress.

Subwoofer drivers operated at these

levels of power are NOT covered under

warranty.

JL Audio offers an extensive line of high-performance subwoofer drivers to fit a wide variety of enclosure and power applications. When designing systems with our

drivers, it is very important to achieve a good power match between the subwoofer amplifier and the subwoofer driver's capabilities. The power levels listed in the

above chart represent continuous (RMS) amplifier power per woofer and assume that the user will regularly make full use of that power without drastically

overdriving the amplifier(s). Make sure you factor system impedance and the total number of subwoofers into your calculations. Adhering to these power

recommendations will result in systems that are both reliable and enjoyable.

8IB4

12IB4

10IB4

MINIMUM OPTIMUM MAXIMUM

LEGEND:

WARRANTY VOID

25W 50W 100W 200W 400W

RECOMMENDED CONTINUOUS (RMS) POWER RANGE FOR ONE SUBWOOFER DRIVER: