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components is extremely
important for proper performance
and long term reliability.
All wiring connections should be
made either by soldering with
heatshrink tubing insulation or
with high quality crimp type
insulated connectors installed with
a good crimping tool. Soldering
crimp connections is recom-
mended to further enhance
connection reliability. Never use
wire-nuts, insulation-displacement
connectors (i.e. ScotchLok type), or
“twist and tape” connections. Do
not use electrical tape; it will

loosen with age and extreme
temperatures. Never leave bare
wire exposed.
Route the wiring through the car
carefully. Do not allow wires to lay
against sharp sheet metal edges or
any other surfaces that might wear
away or cut through the insulation
of the wire. Use insulated strain
reliefs, rubber grommets and
plastic tubing to protect the wires
whenever they are run through
sheet metal panels or are placed
where they might be pulled or
damaged.

5

Cassette/CD Tuner

CD Player

or Changer

CD Input

Cassette/CD Preamp Output

Antenna Input

Power
Antenna

Power

Antenna

Relay

Blue w/White Stripe - Remote On/Off

Main +12V

Power Ground

Chassis Ground

Vehicle Battery

+

Ignition Switch

Antenna

Motor

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

GTS300 – 40 Amp
GTS600 – 80 Amp

(Not Included)

Amplifier

Power

Connection

Amplifier
Speaker
Output
Connection

Amplifier

Speaker

Level

Input

Line

Input

Cassette/CD Tuner 
Speaker Level Output Connection
(Use only when line level ouput
is not available)

POWER

M

A D

E I N T H E

U S

A

Summary of Contents for GTS300

Page 1: ...urity system make certain you know the code 1 1 Introduction Thanks for purchasing your new GT series automotive amplifier The GT series amplifier you have chosen includes many unique features to enha...

Page 2: ...supplied speaker level input connector or both 6 Connect the speakers to the amplifier according to the wiring diagram 7 Turn the input gain adjustment to the 1 4 position 8 Set the crossover switche...

Page 3: ...to set the input mode for both preamp and speaker level inputs Set this switch to Stereo for normal operation using both left and right inputs Set this switch to R to drive both the left and right out...

Page 4: ...s important to keep noise low and is explained in the Adjusting the Gain section of this manual Thanks to Universal Interface Circuitry the GTS300 or GTS600 can also be connected to power amplifiers r...

Page 5: ...ut through the insulation of the wire Use insulated strain reliefs rubber grommets and plastic tubing to protect the wires whenever they are run through sheet metal panels or are placed where they mig...

Page 6: ...ne crossover is connected in series with the amplifier circuitry and the other crossover is connected to the preamp level output jacks These crossovers can be set in either the flat full bandwidth ope...

Page 7: ...ay bend the leads of 1 4 watt resistors 90 degrees trim them to 3mm length and insert them directly into the chip sockets To change the crossover frequency change the resistor network as follows 1 Rem...

Page 8: ...ow gain setting on the amplifier will help keep backgroune noise levels in the system low To adjust a system using a single amplifier start with the amplifier gain controls fully counterclockwise Set...

Page 9: ...lications The following diagrams show the most common basic system configurations of the GTS300 and GTS600 A combination of one or more of these building blocks may be combined to form elabo rate syst...

Page 10: ...eo Speaker Output Speaker Output Crossover Input Mode Switch Switch Low Pass Stereo Main speakers are driven by head unit or additional amplifier Single Amplifier Subwoofer Operation Mono Main speaker...

Page 11: ...ed System Using Preamp Output Capability C C L Subwoofer Low Pass Tweeter Midrange Satellites High Pass High Pass Satelite Crossover Frequency 100Hz C 300 F capacitor 100V non polorized Subwoofer Low...

Page 12: ...ult is found consult your JBL dealer Remote on wire between the head unit and the amplifier is disconnected or defective check for 12 volts between amplifier s remote on input terminal and the ground...

Page 13: ...shorts frayed wiring damaged wiring insulation or incorrect wiring The speaker combination connected to the amplifier is less than the minimum requirement reconfigure speaker connection after consulti...

Page 14: ...0 1dB 200 100mV 4V RMS 500mV Nominal 10k Ohms 15 Ohm or 100k Ohm Selected By Internal Jumpers 200mV 8V RMS 2V Nominal 1V out for 4V Speaker Level Input 2 Ohms 4 Ohms 18dB per Octave Low Pass Filter Fr...

Page 15: ...ound 40 Amp ATC Type Fuse 13 1 4 x 9 1 4 x 2 337 mm x 235 mm x 51 mm 10 lbs 8 5 oz 4 8 Kg Molex Mini Fit Jr 39 01 2045 P Metal Pins 39 00 0039 GTS600 11 to 16V DC Negative Ground 40 Amp ATC Type Fuse...

Page 16: ...1988 Accredited test laboratory MIKES PRODUCT SERVICE GmbH Ohmstrasse 2 4 D 94342 Strasskirchen GERMANY date tbd Steen Michaelsen Harman Marketing Europe a s The appliance conforms with EEC directive...

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