GTH 400 (serv.man2) - JBL Car Audio User Guide / Operation Manual. Page 17

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16
is heat- and oil-resistant whenever
running wires through the engine
compartment. All wire-to-wire
connections should be soldered and
insulated with heat shrink tubing, or
connected through a high-quality
insulated crimp-on connector or
secure set-screw-type terminal
blocks. Never leave bare wire
exposed. Terminate wires with crimp-
or solder-on lug terminals whenever
appropriate.
High Pass Satellite 
Crossover Frequency: 100Hz
C:
300
µ
F capacitor
100V, non-polorized
Subwoofer Lowpass
Crossover Frequency: 100Hz
L:
6.2mH air core inductor
(+)
(+)
(–)
(–)
(+)
(–)
C
Subwoofer (Low-Pass)
Tweeter/Midrange Satellites
(High Pass)
Right
Left
C
L
POWER
BATT(+)
REM OUT
REM IN
GND
SPEAKER LEVEL
INPUTS
FUSE
30A
FUSE
30A
_
_
_
_
+
+
L               1               R
L               2               R
L               3               R
+
+
+
+
L
R
+       –           –       +
+       –           –       +
R           2           L
R           1           L
+
–
1
2
3
1
2
3
LINE LEVEL INPUTS
PREAMP OUTPUTS
SPEAKER OUTPUTS
30A
30A
GTH400
A. Satellite/Subwoofer
POWER
BATT(+)
REM OUT
REM IN
GND
SPEAKER LEVEL
INPUTS
FUSE
30A
FUSE
30A
_
_
_
_
+
+
L               1               R
L               2               R
L               3               R
+
+
+
+
L
R
+       –           –       +
+       –           –       +
R           2           L
R           1           L
+
–
1
2
3
1
2
3
LINE LEVEL INPUTS
PREAMP OUTPUTS
SPEAKER OUTPUTS
30A
30A
Stereo, Non-Bridged
Speaker Connection*
Center Channel
Bridged Speaker Connection*
* Center Channel Speaker Minimum 8 Ohms, Main
Speakers Minimum 4 Ohms When Used Simultaneously.
8 
Ω
 L-Pad
(Optional but Recommended)
4
Ω
 Minimum
4
Ω
 Minimum
GTH400
(+)
(–)
(+)
(+)
(–)
(–)
8 
Ω
 
Minimum
B. Center Channel
*You may change the subwoofer satellite crossover frequency by using the 
Inductor and Capacitor values calculated with the following formulas:
High-Pass (Satellite Crossover):                                                                   = New Capacitor Value in 
µ
F
Low-Pass(Subwoofer Crossover):                                                                = New Inductor Value in mH
30,000
Desired crossover Frequency in Hz
620
Desired crossover Frequency in Hz 
Simultaneous Stereo-Mono 
Connection Diagrams
GTH400-20107  06/03/98 15:49  Side 16
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