JBL Grand touring series User Manual page 22

Audio Input Connections
22
Line Level Input Connections
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Proper wiring between the signal
source, any other components in
the system and the GTS180x will
help keep noise levels in the SYS-
tern low. Use high-quality, low-
capacitance shielded wire. Keen
the wire as short as possible. Do
not splice together shielded
wires. Do not run audio signal
wires alongside power wires
either for the amp or the vehi-
cle's standard power wires, for
an extended length. When wires
are run for long distances, sena-
rate the audio signal wires from
power supply wires or vehicle
wiring
harnesses as much as POS-
sible. When signal wires and
power wires must cross, try to
keep them perpendicular. Avoid
routing any wires near acces-
sories such as ignition control
modules, tachometers, fuel
pumps or fan motors.
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The line-level inputs of the
GTS180x accent standard ohono
plugs (also called RCA plugs).
The outputs of most head units,
equalizers or crossovers also
accept phono plugs. If another
type of connector is used,
adapters or special cables mav
be needed. Proper wire and con-
nectors can be obtained from
any
JBL authorized installation
specialist.
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NOTE: The GTS amplifier has a
built-in frequency selectable low-
pass (subwoofer) crossover and
a frequencv selectable high-pass
(satellite) crossover. Be sure the
crossover switch is nronerlv set
for the chosen system
configuration (See "Add-On and
Upgrade Steps" section for
suggestions). If YOU have any
questions about how to set this
switch, contact your local JBL
dealer.
Speaker-Level Input Connections
When speaker-level signal is used
to drive the GTS18Ox, the signal
goes into the amp through a special
four-wire harness/connector (see
the "Controls and Connectors"
section). If extension wires are
needed between the head unit
output and the amplifier unit, use
conventional speaker wire.
Keep
the wiring inside the passenger and
trunk compartments and make the
wires OS short as wssible. All
connections should be securely
crimped or soldered and insulated
with heatshrink tubing.
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Use the color code of the input
harness wires and the identifica-
tion on the radio/tape deck out-
put wires to be sure that left and
right channels are correctly con-
nected and the positive/negative
polarity of each channel is
observed. For example, the left
positive output of the head unit
must be connected to the left
positive input of the GTS180x.
The color code for the speaker-
level input harness is as follows:
Speaker-Level Input Harness
Color Codes
Left (+) = White
Left (-) = White with Black Stripe
Right (+) = Grw
Right C-j = Gray with Black Stripe