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6 JL AUDIO
®
APPENDIX A
Input Sensitivity Level Setting
Follow the steps below to adjust the input
sensitivity of the amplifier to achieve overall
system balance.
1) Turn off or set to center all processing (bass/
treble, loudness, EQ, etc.) on the source unit. Set
the source unit’s fader control to center position
and its subwoofer level control (if applicable) to ¾
of maximum.
2) Turn the amplifier’s “Input Sensitivity”
control to the “Min.” position.
3) While playing a dynamic audio track,
increase the head unit volume until the subwoofer
output distorts. Then, reduce the volume by one
step (or until the subwoofer’s output is no longer
distorted).
4) Increase the “Input Sensitivity” until the
subwoofer output is distorted.
5) Reduce the “Input Sensitivity” slightly until
the subwoofer output is no longer distorted.
6) Listen to the overall system and adjust the
“Input Sensitivity” downward if the subwoofer
output requires attenuation to achieve the desired
system balance.
APPENDIX B
With the optional RBC-1 Remote Level
Control (sold separately), you can control the
subwoofer volume from the front of the vehicle.
The RBC-1 connects to the jack labeled “Remote
Level Control” on the amplifier panel using
a standard telephone cable (supplied with the
RBC-1). When connected to the amplifier, the
Remote Level Control operates as follows. At
full counter-clockwise rotation, the audio will
mute completely. At full clockwise rotation, the
level will be the same as if the RBC-1 was not
connected at all. In other words, it operates strictly
as a level attenuator. Care should be taken to
securely mount this control in a manner that does
not interfere with the vehicle’s operation. When
setting the amplifier’s input sensitivity, the Remote
Level Control should be unplugged or at full
clockwise rotation (maximum level).
PROTECT YOUR HEARING!
We value you as a long-term customer. For
that reason, we urge you to practice restraint in
the operation of this product so as not to damage
your hearing and that of others in your vehicle.
Studies have shown that continuous exposure to
high sound pressure levels can lead to permanent
(irreparable) hearing loss. This and all other
subwoofer systems are capable of producing
high sound pressure levels. Please limit your
continuous exposure to high volume levels. While
driving, operate your audio system in a manner
that still allows you to hear necessary noises to
operate your vehicle safely (horns, sirens, etc.).
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