JBL GTS 100 (serv.man2) User Manual / Operation Manual ▷ View online
13
Cassette/CD Tuner
(Head Unit)
CD Player
or Changer
CD Input
Cassette/CD Preamp Output
Antenna Input
Power
Antenna
Antenna
Power
Antenna
Relay
Blue w/White Stripe - Remote On/Off
Yellow
Main +12V
Black - Power Ground
Chassis Ground
Vehicle Battery
–
+
Ignition Switch
Antenna
Motor Ground
Power
Supply
Blue (Blue/White)
Remote On/Off
Remote Antenna
Black - Power Ground
Red - Main +12V
Yellow - Back Up Power
Speakers
+
–
+
Fuse
Fuse
Fuse
Cassette/Receiver
Power Supply
Wires
POWER
G T
S 1 0 0
M A
D E
I N
T H E
U S
A
20 Amp
(Not Included)
Amplifier
Power
Connection
Amplifier
Speaker
Output
Connection
Speaker
Output
Connection
Amplifier
Speaker
Level
Input
Cassette/CD Tuner
Speaker Level Output Connection
(Use only when line level ouput
is not available)
Speaker Level Output Connection
(Use only when line level ouput
is not available)
Typical System Configuration
JBL 1394 Manual 7/17/98 11:49 AM Page 13
Power Supply Connections
The power input and remote turn-on
wires are connected to the GTS100 via
the power connector on the end of the
amplifier. Use the included wire harness
for connections. In some cases, such
as a custom competition installation,
you may wish to make your own custom
power harness. The part number of the
mating connector and terminals is listed
in the specifications section of the man-
ual, and is a common part available at
many electronics parts retailers. Please
do not call JBL for this, we stock only
the pre-made harness as supplied with
the amplifier.
wires are connected to the GTS100 via
the power connector on the end of the
amplifier. Use the included wire harness
for connections. In some cases, such
as a custom competition installation,
you may wish to make your own custom
power harness. The part number of the
mating connector and terminals is listed
in the specifications section of the man-
ual, and is a common part available at
many electronics parts retailers. Please
do not call JBL for this, we stock only
the pre-made harness as supplied with
the amplifier.
+12V Battery Wire (Yellow)
• Connect the yellow wire directly to
+12 volt terminal of the battery.
• If it is necessary to extend the power
wire, use 12 gauge or larger wire that
is heat and oil resistant.
is heat and oil resistant.
• The GTS100 will draw as much as
20-Amps from the vehicle’s electrical
system, enough to overload conven-
tional vehicle wiring. Therefore the
+12 volt power supply must be
directly from the positive side of the
battery. Do not connect to the
vehicle’s fuse block or to a wire
feeding other accessories.
system, enough to overload conven-
tional vehicle wiring. Therefore the
+12 volt power supply must be
directly from the positive side of the
battery. Do not connect to the
vehicle’s fuse block or to a wire
feeding other accessories.
• To prevent electrical system damage
or fire, a fuse holder and fuse (not
included, maximum 20A) must be
installed in the power supply wire, as
close to the battery as possible, and
before the wire travels through the
firewall or other metal panel.
included, maximum 20A) must be
installed in the power supply wire, as
close to the battery as possible, and
before the wire travels through the
firewall or other metal panel.
Ground Wire (Black)
• Proper grounding is extremely impor-
tant. It has a significant effect on the
overall performance and noise level
of the system. The ground wire must
be solidly connected to a major sheet
metal structure of the vehicle. Usually
the power supply ground wire can be
connected to a sheet metal panel
near the amp mounting location.
Scrape all paint and primer off the
sheet metal at the grounding point to
ensure a good electrical connection.
Attach the wire to the grounding point
with a sheet metal screw and lock
washer (preferably a star lock washer)
or a bolt/lock washer/nut set.
overall performance and noise level
of the system. The ground wire must
be solidly connected to a major sheet
metal structure of the vehicle. Usually
the power supply ground wire can be
connected to a sheet metal panel
near the amp mounting location.
Scrape all paint and primer off the
sheet metal at the grounding point to
ensure a good electrical connection.
Attach the wire to the grounding point
with a sheet metal screw and lock
washer (preferably a star lock washer)
or a bolt/lock washer/nut set.
• In some vehicles, such as those
that have non-metal bodies, it may
be necessary to extend the power
supply ground wire and connect it to
a frame rail or even directly to the
negative (-) terminal of the battery.
Use heat and oil resistant 10 gauge
or larger stranded copper automotive
wire and crimp or solder and insulate
the wire-to-wire connections. Keep
the extension wire as short as possible.
Solder or crimp a terminal on the end
of the extension wire and connect it
to the frame or battery terminal.
be necessary to extend the power
supply ground wire and connect it to
a frame rail or even directly to the
negative (-) terminal of the battery.
Use heat and oil resistant 10 gauge
or larger stranded copper automotive
wire and crimp or solder and insulate
the wire-to-wire connections. Keep
the extension wire as short as possible.
Solder or crimp a terminal on the end
of the extension wire and connect it
to the frame or battery terminal.
• 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 pre-
vent noise pickup from a ground
loop. In some unusual installations
the noise level will be lower if the
amplifier or amplifiers are grounded
to the same point that the head unit
is grounded. Use of heavy gauge
ground all of the amplifiers and signal
processors to the same point to pre-
vent noise pickup from a ground
loop. In some unusual installations
the noise level will be lower if the
amplifier or amplifiers are grounded
to the same point that the head unit
is grounded. Use of heavy gauge
14
JBL 1394 Manual 7/17/98 11:49 AM Page 14
wire for all grounding, even signal
processors and head units, can also
help to minimize possible noise
pickup.
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.
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.
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
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.
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.
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.
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
outboard crossover, use the “R” mode
and connect your source input to the
right channel input.
and connect your source input to the
right channel input.
Simultaneous Stereo + Mono – For this
connection, the Input Mode switch is left
in the stereo position. Main speakers
are connected normally to the left and
right stereo outputs, and a center-
channel or subwoofer speaker is con-
nected in bridged mode. Refer to the
diagram on page 19 in the “Speaker
Connections” section for details.
connection, the Input Mode switch is left
in the stereo position. Main speakers
are connected normally to the left and
right stereo outputs, and a center-
channel or subwoofer speaker is con-
nected in bridged mode. Refer to the
diagram on page 19 in the “Speaker
Connections” section for details.
Speaker Level Input Connections
When speaker level signal is used to
drive the GTS100, 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 as
short as possible. All connections
should be securely crimped
or soldered and insulated with
heatshrink tubing.
When speaker level signal is used to
drive the GTS100, 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 as
short as possible. All connections
should be securely crimped
or soldered and insulated with
heatshrink tubing.
Use the color code of the input harness
wires and the identification on the
radio/tape deck output wires to be sure
that left and right channels are correctly
connected and the positive/negative
polarity of each channel is connected
correctly. For example, the left positive
output of the head unit must be con-
nected to the left positive input of the
GTS100. The color code for the speaker
level input harness is as follows:
wires and the identification on the
radio/tape deck output wires to be sure
that left and right channels are correctly
connected and the positive/negative
polarity of each channel is connected
correctly. For example, the left positive
output of the head unit must be con-
nected to the left positive input of the
GTS100. The color code for the speaker
level input harness is as follows:
NOTE: The GTS100 has a built-in
80Hz low pass (subwoofer) crossover and
a 100Hz high pass (satellite) crossover.
Be sure the crossover switch is properly
set for the chosen system configuration
(See the “Typical Applications” section
for suggestions). If you have any ques-
tions about how to set this switch, con-
tact your local JBL dealer.
Input-Mode Switch
This switch is set according to the num-
ber of input channels connected to the
amplifier and the desired mode of oper-
ation. See diagrams on pages 7 and 8
and the descriptions below for options.
This switch is set according to the num-
ber of input channels connected to the
amplifier and the desired mode of oper-
ation. See diagrams on pages 7 and 8
and the descriptions below for options.
Standard Operation – When using the
GTS100 as a conventional stereo
amplifier simply connect the preamp-
level source outputs directly to the two
gold RCA connectors or connect the
head unit speaker outputs to the
speaker-level inputs with the input
mode switch set to “stereo.” When
using two sources, both the speaker
and preamp-level inputs may be used
simultaneously. Be sure to maintain left
and right channel consistency.
GTS100 as a conventional stereo
amplifier simply connect the preamp-
level source outputs directly to the two
gold RCA connectors or connect the
head unit speaker outputs to the
speaker-level inputs with the input
mode switch set to “stereo.” When
using two sources, both the speaker
and preamp-level inputs may be used
simultaneously. Be sure to maintain left
and right channel consistency.
Bridged Mode Operation – To select
bridge mode operation, set the input
mode switch in either the “R” only or
“L+R” position. In the “R” position, sig-
nal from the right channel input is fed to
both amplifier channels. In the “L+R”
position, the signal from both channels
is summed internally. When using a sin-
gle GTS100 for mono mode fed with a
stereo signal it is best to use the “L+R”
mode. When using a GTS100 for each
channel, or when feeding a single
GTS100 with a mono signal from an
bridge mode operation, set the input
mode switch in either the “R” only or
“L+R” position. In the “R” position, sig-
nal from the right channel input is fed to
both amplifier channels. In the “L+R”
position, the signal from both channels
is summed internally. When using a sin-
gle GTS100 for mono mode fed with a
stereo signal it is best to use the “L+R”
mode. When using a GTS100 for each
channel, or when feeding a single
GTS100 with a mono signal from an
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JBL 1394 Manual 7/17/98 11:49 AM Page 16
Click on the first or last page to see other GTS 100 (serv.man2) service manuals if exist.