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NOTE: The remote turn-on connection is not needed when using the
high-level input connections. See Auto Turn-On switch, on this page.
USING THE SUBWOOFER
WARNING: Playing loud music in an automobile can hinder your
ability to hear traffic and permanently damage your hearing. We
recommend listening at low or moderate levels while driving
your car. We accept no liability for hearing loss, bodily injury or
property damage resulting from the use or misuse of this product.
CONTROLS AND FUNCTIONS
The JBL GT-BassPro12’s control panel features controls and indicators
that make it easy for you to integrate the subwoofer’s sound with almost
any vehicle’s unique acoustic properties.
Power
Indicator
Auto Turn-On
Switch
Phase
Switch
Protect
Indicator
Low Pass
Control
Level
Control
Bass Boost
Control
Power indicator: This LED will glow green when the JBL GT-BassPro12
is operating.
Auto Turn-On switch: If you connected your GT-BassPro12 using
the high-level connectors and did not connect the Remote Turn-On
connector, set the Auto Turn-On switch to the “On” position (in). If you
did connect the Remote Turn-On connector, set the Auto Turn-On switch
to the “Off” position (out).
Protect indicator: This indicator will light up (and the subwoofer will
stop operating) to indicate the following conditions:
• Battery voltage too high/too low
• Subwoofer amplifier over temperature
• Short-circuit in the subwoofer driver or wiring
Correct the condition before attempting to use the subwoofer again.
Phase switch: This switch will reverse the phase of the GT-BassPro12’s
output with respect to its input. When you install the GT-BassPro12 with
an existing factory or aftermarket system, changing the Phase switch
setting to reverse the subwoofer’s phase may produce a discernable
increase or decrease in the amount of upper bass that the system
reproduces, depending on the GT-BassPro12’s location in the vehicle
and the distance between it and the other speakers in the vehicle.
Level control: Use this control to balance the relative volume of the GT-
BassPro12 with the other speakers in the vehicle.
Low Pass control: Use this control to adjust the amount of high-
frequency information present in the GT-BassPro12’s output. A lower
value allows less high-frequency content.
Bass Boost control: Use this control to increase the amount of low
bass output from the GT-BassPro12. The Bass Boost control provides
up to 12dB of boost at 45Hz.
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General
Weight and Dimensions
