16
• When multiple amplifiers are
installed in the system, it is
often best to ground all of the
amplifiers and signal processors
to the same point to prevent
noise pickup from a ground
loop. In some unusual installa-
tions the noise level will be
lower if the amplifier or ampli-
fiers are grounded to the same
point where the head unit is
grounded. Use of heavy gauge
wire for all grounding, even sig-
nal processors and head units,
can also help to minimize possi-
ble noise pickup.
Remote Turn-On Wire
(Blue with White Stripe)
Because the JBL GTS100x
includes Common Sense two-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 con-
nect the remote wire. The ampli-
fier will automatically 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 fol-
lows. If you are using the line-
level inputs, follow the remote
wire connections listed.
The remote power control sys-
tem turns the GTS100x off when
not in use to prevent discharging
of the vehicle’s battery. When
+
12 volts is applied to the remote
wire, the amplifier is turned on.
A red LED on the end panel of
the amplifier 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 GTS100x.
Some head units have no auto-
matic 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 on and
off with the vehicle’s ignition
switch. The remote on/off system
draws negligible current, so a rel-
atively small (18 or 20 gauge)
extension wire may be used. Be
sure to securely crimp or solder
and insulate the wire-to-wire
connections.
GTS100x OM 7/16/98 2:56 PM Page 16
