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wire for all grounding, even signal
processors and head units, can also
help to minimize possible noise
pickup.
Remote Turn-On Wire (Blue with
White Stripe)
Because the JBL GTS100 includes
Common Sense 2-way turn-on
circuitry, you have two options for
remotely activating the amplifier. When
using the speaker level inputs with a
head unit that includes a BTL power
amp it is not necessary to connect the
remote wire. The amplifier will automati-
cally activate whenever you turn on the
head unit. If the head unit is not of the
high power BTL type, Common Sense
will not work. You will need to connect a
remote wire as discussed below. If you
are using the line level inputs follow the
remote wire connections listed below.
The remote power control system turns
the GTS100 off when not in use to pre-
vent discharging of the vehicle’s bat-
tery. When +12 volts is applied to the
remote wire the amplifier is turned on. A
red LED on the end panel of the ampli-
fier lights whenever the amplifier is on.
If the head unit has a +12 volt automatic
antenna or amplifier remote activation
wire, connect it to the blue/white wire of
the GTS100.
Some head units have no automatic
antenna or power amp activation wire.
Other decks have automatic antenna
wires that are “on” only when the radio
is used (the +12 volt signal is off when a
tape is played.) In such cases, connect
the remote turn-on wire to an unused
accessory terminal in the fuse block, or
any other +12 volt source that is turned
15
on and off with the vehicle’s ignition
switch. The remote on/off system draws
negligible current so a relatively small
(18 or 20 gauge) extension wire may be
used. Be sure to securely crimp or sol-
der and insulate the wire-to-wire con-
nections.
Audio Input Connections
Line Level Input Connection
Proper wiring between the signal
source, any other components in the
system and the GTS100 will help to
keep noise levels in the system low.
Use high quality, low capacitance
shielded wire. Keep the wire as short
as possible. Do not splice shielded
wires together. Do not run audio signal
wires alongside power wires either for
the amp or the vehicle’s standard
power wires. When wires are run for
long distances, separate the audio sig-
nal wires from power supply wires or
vehicle wiring harnesses as much as
possible. When signal wires and power
wires must cross, try to keep them per-
pendicular. Avoid routing any wires
near accessories such as ignition con-
trol modules, tachometers, fuel pumps
or fan motors.
The line level inputs of the GTS100
accept standard phono plugs (also
called RCA plugs.) The outputs of most
head units, equalizers or crossovers
also accept RCA connectors. If another
type of connector is used, adapters or
special cables may be needed. Proper
wire and connectors can be obtained
from any JBL authorized installation
specialist.
JBL 1394 Manual 7/17/98 11:49 AM Page 15