DOWNLOAD JBL CS60.4 (serv.man11) Service Manual ↓ Size: 3.9 MB | Pages: 21 in PDF or view online for FREE

Features, specifications and appearance are subject to change without notice.

No audio 

No voltage at BATT+ 

Check voltages at

(POWER LEDs

or REM terminals, 

amplifier terminals

are off)

or bad or no ground 

with VOM

connection

No audio 

Amplifier is

Make sure amplifier

(POWER

overheated

cooling is not blocked

LEDs are on)

at mounting location;
verify speaker-system
impedance is within 
specified limits

Voltage more than 16V

Check vehicle

or less than 8.5V on

charging system

BATT+ connection

No audio

Voltage less than 9V on 

Check vehicle

(POWER BATT+ 

connection

charging 

system

LEDs flash) 

DC voltage on 

Amplifier may need

amplifier output 

service; see enclosed
warranty card for
service information 

Distorted audio

Input sensitivity is 

Check INPUT 

not set properly, or

LEVEL setting; or

amplifier or source 

check speaker wires

unit is defective

for shorts or grounds

Distorted audio

Short circuit in 

Remove speaker leads

and POWER 

speaker or wire

one at a time to locate

LEDs flash

shorted speaker or 
wire, then repair 

Music lacks 

Speakers are not 

Check speaker

“punch”

connected properly

connections for
proper polarity

SETTING THE
CROSSOVER(S)
Determine your system plans and set 
the crossover mode switch accordingly. 
If your system design does not include 
a subwoofer with the 

CS60.4, set the

crossover mode to FLAT and skip to
“Setting Input Sensitivity.”

Initially set the crossover frequency 
control midway. While listening to music,
adjust the crossover for the least 
perceived distortion from the speakers,
allowing them to reproduce as much 
bass as possible. 

Systems using a separate subwoofer set
the crossover mode to HP (high pass) for
your full-range speakers. Adjust the
crossover frequency to limit bass and 
provide increased system volume with 
less distortion.

For subwoofers, choose the highest 
frequency that removes vocal information
from the sound of the subwoofer.

If using the 

CS60.4 to drive a subwoofer(s),

set the crossover mode to LP (low pass).

SETTING INPUT
SENSITIVITY
1. Initially turn the INPUT LEVEL control(s)

to minimum (counter clockwise).

2. Reconnect the (–) negative lead to the

vehicle’s battery. Apply power to the
audio system and play a dynamic music
track.

3. On the source unit, increase the volume

control to 3/4 volume. Slowly increase
the INPUT LEVEL control(s) toward three
o’clock until you hear slight distortion 
in the music. Then reduce the INPUT
LEVEL slightly until distortion is no 
longer heard. 

NOTE: After the source unit is on, blue
LEDs (on the top panel) will light, indicating
the amplifier is on. If not, check the wiring,
especially the remote connection from the
source unit. Also refer to “Troubleshooting”
guide below.

 

CS Series 60.4

 

4

 

CS Series 60.4 

 

 

 

 

 

 

 

 

 

 

 

5

1

2

3

4

5

6

A

B

C

D

6

5

4

3

2

1

D

C

B

A

10 320

20K

10 50

20K

INPUT 

AUX  OUT

Ap

Ap

VARIABLE  LPF/HPF

32Hz--320Hz/12dB

BOOST

VARIABLE

0dB--6dB/45Hz

Ao

SPEAKER

BALANCED

INPUT

(UNIT   GAIN)

MAIN  AMP

2 ohm/4 ohm

10 320

20K

10 50

20K

Ap

VARIABLE  LPF/HPF
32Hz--320Hz/12dB

BOOST

VARIABLE

0dB--6dB/45Hz

Ao

SPEAKER

BALANCED

INPUT

(UNIT   GAIN)

MAIN  AMP

2 ohm/4 ohm

Ap

Ap

Ap

Ap

MODE  HP/FLAT/LP

MODE  HP/FLAT/LP

10 320

20K

10 50

20K

Ap

Ap

VARIABLE  LPF/HPF

32Hz--320Hz/12dB

VARIABLE

0dB--6dB/45Hz

Ao

SPEAKER

BALANCED

INPUT

(UNIT   GAIN)

MAIN  AMP

2 ohm/4 ohm

10 320

20K

10 50

20K

Ap

VARIABLE  LPF/HPF
32Hz--320Hz/12dB

BOOST

VARIABLE

0dB--6dB/45Hz

Ao

SPEAKER

BALANCED

INPUT

(UNIT   GAIN)

MAIN  AMP

2 ohm/4 ohm

Ap

Ap

Ap

Ap

MODE  HP/FLAT/LP

FRONT  L

FRONT  R

REAR   L

REAR   R

 FRONT  L

INPUT 

 FRONT  R

FRONT  L+ REAR  L

INPUT 

 REAR  L

INPUT 

REAR  R

AUX  OUT

FRONT  R+ REAR  R

MODE  HP/FLAT/LP

 

CS Series 60.4

 

6

 

CS Series 60.4

 

7