JBL Home Theater System GTS300 User Manual

1. Introduction  
either subwoofer or com ponent  
speakers in a bi-am plified system ,  
or conventional full-range speakers  
in sim pler system s.  
The GTS300 and 600 also include  
pream p-level outputs which can  
provide either full-range, high-pass  
or low-pass signal to drive  
Thanks for purchasing your new  
GT series autom otive am plifier.  
The GT series am plifier you have  
chosen includes m any unique  
features to enhance its perfor-  
m ance and utility. The power am p-  
lifier circuitry is a fully discrete  
design notable for its low dis-  
tortion and unusually clean and  
clear sound quality. Your GT series  
am plifier will easily connect to  
virtually any car audio system ,  
whether it is factory installed or  
one purchased separately.  
additional am plifiers. This lets you  
build system s of virtually any  
design without requiring a  
separate electronic crossover.  
1.2 About Installation  
Although the GTS300 and GTS600  
are designed to m ake installation  
as easy as possible, they are  
sophisticated products that require  
proper installation to realize their  
full perform ance potential.  
If you feel you do not have the  
necessary knowledge and skills w e  
strongly recom m end that the  
installation be done by your  
authorized J BL dealer.  
If you choose to install the GTS300  
or GTS600 yourself read all of the  
inform ation in this m anual  
before you start the installation.  
Pay particular attention to the  
safety precautions and notes.  
In addition to conventional  
pream plevel inputs, this m odel  
features J BL’s Universal Interface  
design, which facilitates sim ple  
connection to factory radios with  
the low distortion that is usually  
only associated with pream p level  
connection. With Universal Inter-  
face, a factory radio can be used  
either as the m ain m usic source or  
com bined with a CD player or  
changer, which includes volum e  
control capability, sim ultaneously  
connected to the am plifier. By  
providing this two-unit direct  
connection, Universal Interface  
circuitry elim inates the need for an  
FM m odulator to interface a CD  
player to factory radios, im proving  
the fidelity of digital playback.  
In addition, when using a high-  
powered (BTL) radio through the  
speaker-level inputs, Com m on  
Sense turn-on circuitry senses the  
com m on-m ode voltage present on  
the radios speaker wires, turning  
the am plifier on without an  
2. Installation and Use  
Refer to the “Crossover Frequency  
Adjustm ents” and “Speaker Level  
Input Im pedance Adjustm ents”  
sections of this m anual to see if  
you will need to m ake alterations  
to their factory settings. If you are  
not using the built-in crossover, or  
the speaker level inputs, you m ay  
skip this step.  
additional “rem ote” wire.  
1. Disconnect the negative cable  
from the battery. Note: If the  
vehicles radio features a code  
type security system , m ake  
Also, the built-in active crossover  
provides either full-range, high-  
pass or low-pass operation. This  
lets your GT series am plifier power  
certain you know the code  
1
 
9. Fuse – 40 Am p ATC type fuse for  
the GTS300 and two 40 am p fuses  
for the GTS600.  
10. Gain Control – Use this control  
to adjust the input sensitivity of  
the am plifier. See the “Adjusting  
the Gain” section for tips on  
proper setup.  
11. Pream p-Output Crossover  
Switch – This switch controls the  
built-in crossover that is directed  
to the pream p-output connectors.  
Set the switch to “Flat” for full  
band operation. Set this switch to  
Low-Pass” to activate the low-  
pass filter on the pream p output  
(for subwoofer use). Set the switch  
to “High-Pass” to activate the  
high-pass filter for use with  
pass filter on the am plifier (for  
subwoofer use). Set the switch to  
High Pass” to activate the high  
pass filter for use with satellite  
speakers.  
13. Input Mode Selector – This  
switch is used to set the input  
m ode for both pream p and  
speaker-level inputs.  
Set this switch to Stereo for  
norm al operation using both left  
and right inputs. Set this switch to  
R to drive both the left and right  
output channels with only a single  
input on the right channel. Set this  
switch to “L+R” to sum the left  
and right inputs for a m ono output  
on both am plifier channels.  
Power Indicator LED (on chassis  
top) – LED steadily illum inates for  
norm al operation. LED blinks  
when protection circuitry or  
m uting is engaged.  
satellite speakers.  
12. Speaker Output Crossover  
Switch – This switch controls the  
built-in crossover that is connected  
to the power am plifier circuitry.  
Set the switch to “Flat” for full  
band operation. Set this switch to  
Low Pass” to activate the low  
14. Bass Boost Switch – This  
activates a built-in Bass Boost  
circuit used to increase low-bass  
output.  
SPEAKER  
OUTPUT  
LINE  
INPUT  
PREAMP  
OUTPUT  
SPEAKER LEVEL  
INPUT  
POWER  
FUSE  
40A  
+
+
L
L
R
L
REM IN  
+
+
_
_
REM OUT  
R
_
L
_
BATT(+)  
GND  
R
R
BRIDGED  
Preamp Level RCA Inputs  
Remote Turn On Output  
Preamp Level RCA Outputs  
High Level Speaker Inputs  
Speaker Outputs  
Battery Ground  
Battery (+12v) In  
Remote Turn On Input  
Fuse  
Power  
Connector  
SPEAKER OUTPUT  
CROSSOVER  
PREAMP OUTPUT  
CROSSOVER  
BASS BOOST  
INPUT MODE  
NOM  
R
L+R  
FLAT  
OFF  
ON  
HIGH PASS  
FLAT  
HIGH PASS  
LOW PASS  
STEREO  
LOW PASS  
MIN  
MAX  
GAIN  
Gain Control  
Preamp Crossover Frequency Selector  
Amplifier Crossover Frequency Selector  
Input Mode Selector  
Bass Boost  
3
 
3.2 Signal Sources  
3. System Design Using the  
GTS300 or GTS600:  
The low level pream p outputs of  
any radio/tape deck, CD player or  
pream p/equalizer so equipped can  
drive the GTS300 or GTS600. The  
gain controls of the GTS300 or  
GTS600 are used to m atch the  
am plifiers input sensitivity to the  
output voltage of the source. This  
m atching is im portant to keep  
noise low and is explained in the  
Adjusting the Gain” section of  
this m anual.  
Thanks to Universal Interface  
Circuitry, the GTS300 or GTS600  
can also be connected to power  
am plifiers, radios or equalizers  
that are equipped with only  
speaker outputs by connecting  
them through the speaker level  
input connector. Inside the GTS300  
or GTS600, the speaker-level and  
pream p-level inputs are connected  
through a m ixing circuit, which  
allows them to be used  
3.1 Speaker Requirem ents  
When used in the non-bridged  
m ode the GTS300 or GTS600 can  
easily drive 2 ohm speaker loads.  
When only one speaker is  
connected to each channel,  
virtually any conventional speaker  
m ay be used.  
When the GTS300 or GTS600 is in  
bridged m ode, the com bined  
im pedance of the speaker (or  
speakers) connected to the bridged  
channel should be at least 4 ohm s.  
Sustained operation of the GTS300  
or GTS600 in bridged m ode with  
less than 4 ohm s will likely cause  
overheating.  
The GTS300 or GTS600 m ust not  
be used w ith speakers that have  
either one of their input term inals  
w ired to the fram e of the speaker  
or to the chassis of the vehicle.  
sim ultaneously. Therefore a low  
level source, such as a CD player  
equippe with a volum e control  
m ay be connected to the pream p-  
level inputs at the sam e tim e as a  
powered radio/tape unit is  
Parallel Wiring  
(+)  
2 Ohms  
Nominal  
4 Ohms  
4 Ohms  
connected to the speaker-level  
inputs. This provides a higher  
perform ance alternative to an FM  
Modulator connection when you  
wish to add CD capability to a  
factory casette stereo. Switching  
from one source to the other is as  
sim ple as turning the desired  
source on and turning the  
Impedance  
(–)  
(+)  
Series Wiring  
4 Ohms  
undesired one off – no additional  
switches or relay connections are  
needed.  
8 Ohms  
Nominal  
Impedance  
4. Wiring  
Proper wiring of the GTS300 or  
GTS600 and the associated  
4 Ohms  
(–)  
4
 
com ponents is extrem ely  
im portant for proper perform ance  
and long term reliability.  
loosen with age and extrem e  
tem peratures. Never leave bare  
wire exposed.  
All wiring connections should be  
m ade either by soldering with  
heatshrink tubing insulation or  
with high quality crim p type  
insulated connectors installed with  
a good crim ping tool. Soldering  
crim p connections is recom -  
m ended to further enhance  
connection reliability. Never use  
wire-nuts, insulation-displacem ent  
connectors (i.e. ScotchLok type), or  
“twist and tape” connections. Do  
not use electrical tape; it will  
Route the wiring through the car  
carefully. Do not allow wires to lay  
against sharp sheet m etal edges or  
any other surfaces that m ight wear  
away or cut through the insulation  
of the wire. Use insulated strain  
reliefs, rubber grom m ets and  
plastic tubing to protect the wires  
whenever they are run through  
sheet m etal panels or are placed  
where they m ight be pulled or  
dam aged.  
Cassette/CD Tuner  
Speaker Level Output Connection  
(Use only when line level ouput  
is not available)  
CD Player  
or Changer  
Cassette/CD Tuner  
Antenna Input  
CD Input  
Power  
Antenna  
Cassette/Receiver  
Power Supply  
Wires  
Cassette/CD Preamp Output  
Power  
Antenna  
Relay  
Amplifier  
Power  
Connection  
Amplifier  
Speaker  
Level  
Input  
Amplifier  
Speaker  
Output  
Line  
Input  
Connection  
+
+
Speakers  
Blue w/White Stripe - Remote On/Off  
Ignition Switch  
GTS300 – 40 Amp  
GTS600 – 80 Amp  
(Not Included)  
Fuse  
Main +12V  
+
Vehicle Battery  
Power Ground  
Chassis Ground  
5
 
Crossover Frequency  
Adjustm ents  
5. Internal Adjustm ents  
Speaker-Level Input  
Im pedance Adjustm ents  
The GTS300 and GTS600 am pli-  
fiers include built-in frequency  
selectable crossovers. One  
The speaker level inputs of the  
GTS300 and GTS600 com e factory  
set with 100K ohm input im pe-  
dance. This will provide the lowest  
distortion operation from the  
speaker outputs of m ost m odern  
head units by reducing the power  
the am plifier in the head unit m ust  
deliver to practically nothing.  
On som e older, or lowerpriced  
head units, this load will not  
facilitate proper fader operation.  
To provide for this, we have  
provided the ability to change the  
input im pedance of the speaker-  
level inputs to 15 ohm s. This is  
accom plished by connecting the  
jum pers as shown in the diagram  
below.  
crossover is connected in series  
with the am plifier circuitry and the  
other crossover is connected to the  
pream p level output jacks. These  
crossovers can be set in either the  
flat” (full bandwidth operation),  
Low Pass (Subwoofer operation),  
or High Pass (satellite operation).  
• The crossover frequencies are  
set by “chips” inside the  
am plifier. These “chips” are  
sim ply a set of resistors,  
connected across the pins and  
m olded into a single package.  
The crossover frequencies m ay  
be changed to any value desired  
by changing the resistor  
network. J BL has “chips”  
available in the popular values  
listed in the table below. If none  
of these suit your system , you  
m ay pruchase com patible  
JUMPER SELECTOR  
SELECT 100K OR 15 OHMS  
R
R
BALANCED  
RIGHT  
INPUTS  
ZIN  
SEL  
L
resistor networks from a local  
electronics store, or you m ay  
build you own custom values  
from discrete resistors m ounted  
on a 14-pin “DIP Header” using  
the instructions which follow.  
L
I N P U T  
L I N E  
15 OHM  
B R I D G E D  
O U T P U T  
P R E A M P  
100K  
15 OHM  
R
+
LEFT  
ZIN  
SEL  
R
100K  
I N P U T S P E A K E R L E V E L  
L
+
SPEAKER  
INPUT  
IMPEDANCE  
SELECTOR  
40  
B A  
4 0 A  
F U S E  
G N
O U
R E
• If the head unit has 4 channels of  
builtin am plification and/or an  
electronic fader control, you  
should leave the jum pers in the  
factory set position.  
• If the head unit has 2 channels of  
am plification, with a speaker-  
level fader, the jum pers should  
be set to the 15-ohm position.  
This will always be a rotary-type  
control, not one controlled by  
elecronic pushbuttons.  
Frequency Resistor J BL Part  
Value  
47 K  
33 K  
20 K  
12 K  
10 K  
4.7 K  
1 K  
Num ber  
GTM 50  
GTM 80  
GTM 120  
GTM 200  
GTM 250  
GTM 500  
GTM 2500  
GTM 5000  
50 Hz  
80 Hz  
120 Hz  
200 Hz  
250 Hz  
500 Hz  
2.5 Hz  
5 Hz  
470  
6
 
Regardless of whether you build  
or buy it, the necessary resistor  
network has the following  
configuration:  
To build chips” from discrete  
resistors, solder the resistores to  
a standard 14-pin “DIP Head”  
according to the diagram . If a  
DIP Header is not available, you  
m ay bend the leads of 1/4 watt  
resistors 90 degrees, trim them  
to 3m m -length, and insert them  
directly into the chip sockets.  
Custom “ChipConstruction  
To change the crossover frequency  
change the resistor network as  
follows:  
1. Rem ove the screws from the  
bottom panel as shown below.  
2. Select which resistor m odule,  
high pass or low pass, that you  
wish to change.  
3. A chip puller, wich can be  
obtained from any electronics  
store, is used to rem ove the  
resistor chip. Pull the resistor  
chip from the socket as shown  
in figur below.  
• Each resistor in the package has  
the sam e value.  
• If you kvow the crossover  
frequency you want, you can  
calculate the resistor value  
necessary by solving the  
following equation:  
Resistor  
Value  
in Ohm s  
2,500,000  
Crossover  
Frequency in Hz  
=
JBL INC.  
REV  
JBL GTS600  
NORHRIDGE, CA  
A
PC00108800  
FILTER  
LOW PASS  
CROSSOVER  
FREQUENMCOYDULE  
SELECTION  
C10  
C13  
FILTER  
HIGH PASS  
FREQUENMCOYDULE  
SELECTION  
• Use the following equation if  
you have a resistor pack of a  
known value, and want to find  
its crossover frequency:  
4. Place the new m odule in the  
socket m aking sure all pins are  
lined up with the socket holes.  
Press the m odule firm ly into the  
socket.  
Crossover  
2,500,000  
Crossover  
Frequency =  
in Hz  
Resistor Value in Ohm s  
5. Replace the bottom lid.  
7
 
6. Input Gain Adjustm ent  
Before operating the GTS300 or  
GTS600, recheck all wiring  
until the system plays as loud as  
necessary ot when the first signs of  
distortion are heard.  
connections to m ake sure they are  
correct and secure. Be sure that a  
fuse (40 am p for GTS300 and two  
40 am p fuses for the GTS600, not  
included) is installed in the +12V  
line near the battery. Reconnect the  
negative ground (-) term inal of the  
battery. Make sure that the input  
m ode selector, speaker output  
crossover frequency m odules, and  
pream p output crossover switch  
are properly set.  
BEST-Vertical Mounting  
AIR FLOW  
Adjusting the Gain  
• The setting of the gain control on  
the GTS300 and GTS600 is  
im portant to ensure proper  
perform ance, low noise levels,  
and m axim um reliability in the  
system .  
Using a high signal level from  
the source and a low gain setting  
on the am plifier will help keep  
backgroune noise levels in the  
system low.  
To adjust a system using a single  
am plifier, start with the am plifier  
gain controls fully  
GOOD-Horizontal Mounting  
counterclockwise.  
Set all Bass/Treble or equalizer  
controls to their centered or  
bypassed positions. While  
AIR FLOW  
listening carefully to the system  
output, adjust the volum e control  
of the radio/tape deck to the point  
where you first begin to hear  
audible distortion. Reduce the  
level just to the point where the  
distortion goes away.  
NEVER-Mount Upside Down  
If this setting does not provide  
adequate volum e levels, gradually  
increase (turn clockwise) the gain  
control on the GTS300 ot GTS600  
8
 
7. Typical Applications  
The following diagram s show the  
m ost com m on basic system  
configurations of the GTS300 and  
GTS600. A com bination of one or  
m ore of these “building blocks”  
m ay be com bined to form elabo-  
rate system designs.  
9
 
Application 1  
Stereo Full-Range or Subwoofer Operation  
Preamp or  
Speaker-Level  
Input  
L
R
Full-Range Operation  
Speaker Output  
Crossover  
Switch  
Input Mode  
Switch  
Flat  
Stereo  
Subwoofer Operation  
Speaker Output  
GTS300/600  
Crossover  
Switch  
Input Mode  
Switch  
L– L+  
R– R+  
2 or 4-Ohm  
Full-Range  
Speakers or  
Subwoofers  
+
+
Low Pass  
Stereo  
Main speakers are driven by head unit or  
additional amplifier.  
Application 2  
Bridge-Mode Operation  
R
Preamp or  
L
Speaker Level  
Single Amplifier:  
Subwoofer-Operation (Mono)  
Speaker Output  
Amp  
Crossover  
Switch  
Input Mode  
Switch  
For Dual-Amplifier  
For Single Amplifier  
Subwoofer Use  
Full-Range or Subwoofer Use  
B
Low Pass  
L + R  
L
R
R
Main speakers are driven by head unit or  
additional amplifier.  
Dual Amplifier:  
Subwoofer-Operation (Stereo)  
Speaker Output  
Amp  
Crossover  
Switch  
Input Mode  
Switch  
GTS300/600  
GTS300/600  
A
B
A + B  
Low Pass  
R
Full-Range Operation (Stereo)  
L– R+  
L– R+  
4-Ohm  
4-Ohm  
Speaker Output  
Full-Range  
Speaker or  
Subwoofer  
Full-Range  
Speaker or  
Subwoofer  
Amp  
Crossover  
Switch  
Input Mode  
Switch  
+
+
A + B  
Flat  
R
Application 3  
Bi-am plified, Three-channel  
Front  
Rear  
Subwoofer/SatelliteSystem
Preamp or  
Speaker-Level  
Input  
Speaker Output  
R
L
R
L
Amp  
Crossover  
Switch  
Input Mode  
Switch  
A
B
High Pass  
Low Pass  
Stereo  
L + R  
GTS300/600  
GTS300/600  
A
B
Stereo Subwoofers may be used by configuring  
Amp B as shown in Application #1.  
L– R+  
L– R+  
L– R+  
4-Ohm  
Subwoofer  
2 or 4-Ohm  
Full-Range  
Speakers  
+
+
+
10  
 
Application 4  
Bi-am plified, System Using  
Preamp or  
Speaker-Level  
Input  
Pream p Output Capability  
Preamp  
Output  
Preamp  
Intput  
L
R
R
L
L
R
Speaker Output  
Crossover  
Switch  
Amp  
Input Mode  
Switch  
Preamp  
Output  
Crossover  
A
B
High Pass  
Low Pass  
Stereo  
L + R  
Flat  
Doesn't Matter  
GTS300/600  
GTS300/600  
B
Stereo Subwoofers may be used by configuring  
Amp B as shown in Application #1 or by  
using dual GTS amplifiers as shown in  
Application 2.  
A
L– L+  
R– R+  
L– R+  
2 or 4-Ohm  
4-Ohm  
Subwoofer  
Full-Range  
Speakers  
+
+
+
Sim ultaneous Stereo-Mono  
Connection Diagram s  
Subwoofer (Low Pass)  
A. Satellite/Subwoofer  
Component Values for  
4 Ohm Loudspeakers*  
(+)  
(–)  
High Pass Satelite  
Crossover Frequency: 100Hz  
Tweeter/Midrange Satellites  
(High Pass)  
Right  
Left  
C: 300µF capacitor  
100V, non polorized  
(+)  
C
(+)  
C
(–)  
(–)  
L
Subwoofer Low pass  
Crossover Frequency: 100Hz  
L: 6.2mH air core inductor  
GTS300 or GTS600  
SPEAKER  
OUTPUT  
LINE  
INPUT  
SPEAKER LEVEL  
INPUT  
PREAMP  
OUTPUT  
POWER  
FUSE  
40A  
+
+
R
L
L
L
+
R
+
L
_
_
_
REM IN  
BATT(+)  
REM OUT  
GND  
R
R
BRIDGED  
*You may change the subwoofer satelite crossover frequency by using the Inductor and Capacitor values calculated  
with the following formulas:  
30,000  
High Pass (Satelite Crossover):  
Low Pass (Subwoofer Crossover):  
= New Capacitor Value in µF  
Desired crossover Frequency in Hz  
620  
= New Inductor Value in mH  
Desired crossover Frequency in Hz  
11  
 
8. In Case of Difficulty  
Power-on light does not  
com e on  
• Head unit not on; turn the head unit on.  
• Ground wire is disconnected or  
defective; check for continuity with an  
ohm -m eter between the am plifiers  
ground term inal and a know chassis  
ground point.  
• Battery wire is disconnected or  
defective; check approxim ately +12  
volts between the am plifiers battery  
and ground term inals.  
• Blow fuse; check am plifiers located on  
the endpanel near the power connector.  
If it is blown replace it with an identical  
one. If the new fuse blows im m ediately,  
then check all the wiring connection. If  
no fault is found, consult your J BL  
dealer.  
• Rem ote-on wire between the head unit  
and the am plifier is disconnected or  
defective; check for +12 volts between  
am plifiers rem ote-on input term inal  
and the ground input term inal with the  
head unit on.  
Power light is on, but no  
sound is heard from som e  
or all of the speakers  
• Incorrect switch settings; m ake sure  
that all switchs (input m ode and  
crossover) are in their correct positions  
for your system configuration.  
• Incorrectly connected or shorted  
speaker wires; check for shorts in  
wiring.  
• Defective or disconnected audio cables;  
check for continuity and replace if  
necessary.  
• Incorrect Gain Adjustm ent; verify that  
the am plifier gain controls are not  
turned com pletely down. If they are,  
sound output level m ay be very low  
and m ay give the im pression that the  
system ) or part of the system ) is dead.  
• Defective head unit or signal processor;  
check each com ponent for proper  
wiring and operation.  
12  
 
• Defective GTS300 or GTS600; If there is  
audio signal present at the input of the  
am plifier and there is no output, the  
GTS300 or GTS600 m ay be defective.  
Power On light is blinking,  
indicating a fault condition,  
and sound is interm ittent or  
off  
• Incorrectly connected or shorted  
speaker wires; check for shorts, frayed  
wiring, dam aged wiring insulation or  
incorrect wiring.  
• The speaker com bination connected to  
the am plifier is less than the m inim um  
requirem ent; reconfigure speaker  
connection after consulting with section  
3.1 “Speaker Requirem ents.”  
• Am plifier is dam aged; consult your J BL  
Dealer.  
Alternator whine through  
the audio system with the  
engine running  
• Ground loops; verify that the chassis  
grounding point you have chosen is  
true ground by checking for continuity  
between the chassis ground point and  
battery ground.  
Bass output from speakers  
too low  
Speaker wired out of phase; check for  
proper polarity on all speaker wiring (+  
am p term inal to + speaker term inal and  
am p term inal to – speaker term inal).  
13  
 
9. Specifications  
Specifications  
GTS300  
GTS600  
Power Output  
100 Watts x 2  
200 Watts x 2  
(10Hz -50kHz,  
(4 Ohm s, 0.05% THD)  
(4 Ohm s, 0.05% THD)  
14.4V Battery Voltage  
150 Watts x 2  
300 Watts x 2  
(2 Ohm s, 0.08% THD)  
(2 Ohm s, 0.08% THD)  
300 Watts x 1  
600 Watts x 1  
(4 Ohm s, 0.08% Thd)  
(4 Ohm s, 0.08% Thd)  
Signal to Noise Ratio  
Frequency Response  
100dBA  
100dBA  
10Hz - 50kHZ (+0, -1dB)  
10Hz - 50kHZ (+0, -1dB)  
20Hz - 20kHZ (+0, -0.1dB) 20Hz - 20kHZ (+0, -0.1dB)  
Dam ping Factor  
>200  
>200  
Line Level Input Sensitivity 100m V - 4V RMS  
100m V - 4V RMS  
(500m V Nom inal)  
(For Rated Power)  
(500m V Nom inal)  
Line Level Input  
Im pedance  
10k Ohm s  
10k Ohm s  
Speaker Level Input  
Im pedance  
15 Ohm or 100k Ohm  
(Selected By Internal  
J um pers)  
15 Ohm or 100k Ohm  
(Selected By Internal  
J um pers)  
Speaker Level Input  
Sensitivity  
200m V - 8V RMS  
(2V Nom inal)  
200m V - 8V RMS  
(2V Nom inal)  
Pream p Output Sensitivity 1V out for 4V  
Speaker Level Input  
1V out for 4V  
Speaker Level Input  
Minim um Speaker  
Im pedance  
Single Ended  
(Non-Bridged)  
2 Ohm s  
4 Ohm s  
2 Ohm s  
4 Ohm s  
Bridged  
Built in Electronic  
Crossover Frequency  
and Slope  
18dB per Octave Low Pass 18dB per Octave Low Pass  
Filter, Frequency Chips  
Available from 50-5kHZ  
Filter, Frequency Chips  
Available from 50-5kHZ  
18dB per Octave High Pass 18dB per Octave High Pass  
Filter, Frequency Chips  
Available from 50-5kHZ  
Filter, Frequency Chips  
Available from 50-5kHZ  
Bass Boost Frequency  
and Magnitude  
4dB at 40Hz  
4dB at 40Hz  
14  
 
Specifications  
GTS300  
GTS600  
Power Requirem ent  
11 to 16V DC  
Negative Ground  
11 to 16V DC  
Negative Ground  
Fuse Size  
40 Am p ATC Type Fuse  
40 Am p ATC Type Fuse  
(2 per Am plifier)  
Size (L x W x H)  
13 1/4”x 9 1/4”x 2”  
(337 m m x 235 m m x  
51 m m )  
17 1/4”x 11 1/4”x 2”  
(438 m m x 286 m m x  
50.8 m m )  
Weight  
10 lbs 8.5 oz (4.8 Kg)  
13 lbs 11.5 oz (6.2 Kg)  
Speaker Level Input  
Mating Connector  
Molex Mini-Fit J r.  
# 39-01-2045-P  
Metal Pins: 39-00-0039  
Molex Mini-Fit J r.  
# 39-01-2045-P  
Metal Pins: 39-00-0039  
15  
 
DECLARATION OF CONFORMITY  
We, Harm an Marketing Europe a/s  
Kongevejen 194B  
DK-3460 Birkerød  
DENMARK  
declare that the product described in  
this owners m anual is in com pliance  
with technical standards:  
EN 55020, EN 6.1988,  
Accredited test laboratory:  
MIKES PRODUCT SERVICE Gm bH  
Ohm strasse 2-4  
D-94342 Strasskirchen  
GERMANY, (date tbd)  
JBL Consumer Products, Inc.  
80 Crossways Park West  
Woodbury, NY 11799  
Steen Michaelsen  
Harm an Marketing Europe a/s  
8500 Balboa Blvd.  
Northridge, CA 91329  
800-336-4 JBL  
The appliance conform s with EEC  
directive 87/308/EEC regarding  
interference suppression  
A Harm an International Com pany  
Part No. JBLGTS100 OM  
16  
 

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