JBL Stereo Amplifier MA6002 User Manual

MA6004  
MA6002  
MARINE AUDIO  
POWER AMPLIFIER  
OWNER’S MANUAL  
www.jbl.com  
The Official Brand of Live Music.  
 
INSTALLATION  
POWER CONNECTIONS  
The amplifier requires a reliable  
connection to the boat’s electrical  
system in order to perform optimally.  
See Figures 1 and 2 for terminal con-  
nection locations. Please adhere to  
the following instructions carefully:  
Power Connection  
Remote Connection  
Speaker Connections  
Connect a wire (see chart at right for  
appropriate gauge) directly to the positive  
battery terminal, and install an appropriate  
fuse holder within 18" of the battery terminal.  
Do not install the fuse at this time. Route  
the wire to the amplifier’s location, and  
connect it to the amplifier’s Positive (+12V)  
terminal. Be sure to use appropriate  
grommets whenever routing wires through  
a bulkhead or other obstruction. Failure to  
adequately protect the positive wire from  
potential damage may result in a fire. When  
you are done routing and connecting this  
wire, you may install the fuse at the battery.  
Connect the amplifier’s Remote (REM)  
terminal to the source unit’s Remote Turn-  
On lead using a minimum of 18-gauge wire.  
Refer to the application guides on the  
pages that follow. Speaker connections  
should be made using a minimum of  
16-gauge wire.  
NOTE: If your source unit does not have  
a remote turn-on connection, connect  
the amplifier’s (REM) terminal to a wire  
that provides +12V when the boat’s acces-  
sories are on or when the key is switched  
on. If no such circuit exists, install a  
switch. See Figure 3.  
Wire Gauge Chart  
Amplifier  
Model  
Maximum  
Current Draw Wire Gauge  
Minimum  
Ground Connection  
MA6002  
MA6004  
22A  
40A  
#8 AWG  
#8 AWG  
Connect the amplifier’s Ground (GND)  
terminal to the battery’s negative terminal,  
using a ring terminal. Refer to the wire gauge  
chart to determine minimum wire gauge size.  
These recommendations assume 10' – 12'  
wire runs. If your amplifier will be mounted  
farther than 12' from the boat’s battery, use  
a larger gauge.  
Figure 3. Install a switch for the Remote  
Turn-On lead.  
NC  
+
12V  
NO  
AMP REM  
Figure 1. Terminal connection end plate for MA6004.  
Figure 2. Terminal connection end plate for MA6002.  
3
 
APPLICATIONS – MA6004  
Front Left  
Front Right  
The MA6004 can be set up for stereo  
4-channel, 3-channel or bridged  
2-channel operation, as shown in  
Figures 4 through 6.  
Figure 4. MA6004 amplifier in 4-channel (stereo)  
operation to drive front and rear full-range speakers.  
NOTE: For simplicity, Figures 4 through  
6 do not show power, remote and input  
connections.  
NOTE: Minimum speaker impedance  
for stereo operation is 2 ohms.  
Minimum speaker impedance for  
bridged operation is 4 ohms.  
Rear Left  
Front Left  
Rear Right  
Front Right  
Figure 5. MA6004 is set up for 3-channel operation  
to drive a set of full-range speakers and a subwoofer.  
Figure 6. MA6004 used in bridged 2-channel mode to  
drive a set of components or subwoofers. Set crossovers  
according to application.  
4
 
APPLICATIONS – MA6002  
Figure 7. MA6002 used in 2-channel (stereo)  
operation to drive a set of full-range speakers.  
Left  
Right  
Figure 8. MA6002 used in bridge mode to drive a  
subwoofer.  
5
 
CONTROLS AND SETUP  
TROUBLESHOOTING  
SETTING THE  
SETTING INPUT  
SYMPTOM  
LIKELY CAUSE  
SOLUTION  
CROSSOVER(S)  
SENSITIVITY  
No audio  
(POWER LEDs  
are off)  
No voltage at BATT+  
or REM terminals,  
or bad or no ground  
connection  
Amplifier is  
overheated  
Check voltages at  
amplifier terminals  
with VOM  
Determine your system plans and set  
the crossover mode switch accordingly.  
If your system design does not include  
a subwoofer with the MA6004, set the  
crossover mode to FLAT; if you are using  
speakers that are 5 inches in diameter or  
larger, skip to “Setting Input Sensitivity.”  
1. Initially turn the INPUT LEVEL control(s)  
to minimum (counter clockwise).  
2. Reconnect the (–) negative lead to the  
boat’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.  
No audio  
(POWER  
LEDs are on)  
Make sure amplifier  
cooling is not blocked  
at mounting location;  
verify speaker-system  
impedance is within  
specified limits  
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.  
Voltage more than 16V  
or less than 8.5V on  
BATT+ connection  
Voltage less than 9V on  
BATT+ connection  
Check boat’s battery  
charging system  
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 the “Troubleshooting” guide.  
No audio  
(POWER  
LEDs flash)  
Check boat’s  
charging system  
For 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.  
DC voltage on  
amplifier output  
Amplifier may need  
service; see enclosed  
warranty card for  
service information  
Check INPUT  
LEVEL setting; or  
check speaker wires  
for shorts or grounds  
Distorted audio  
Input sensitivity is  
not set properly, or  
amplifier or source  
unit is defective  
For subwoofers, choose the highest  
frequency that removes vocal information  
from the sound of the subwoofer.  
Distorted audio  
and POWER  
LEDs flash  
Short circuit in  
speaker or wire  
Remove speaker leads  
one at a time to locate  
shorted speaker or  
wire, then repair  
If using the MA6004 or MA6002 to drive a  
subwoofer(s), set the crossover mode to  
LP (low pass).  
Music lacks  
“punch”  
Speakers are not  
connected properly  
Check speaker  
connections for  
proper polarity  
6
 
SPECIFICATIONS  
MA6004  
• 60W RMS x 4 channels at 4 ohms and 1% THD + N  
• Signal-to-noise ratio: 80dBA (reference 1W into 4 ohms)  
• 80W RMS x 4 channels at 2 ohms, 14.4V supply and 1% THD + N  
• 160W RMS x 2 channels at 4 ohms, 14.4V supply and 1% THD + N  
• Dynamic power: 145W at 2 ohms  
• Effective damping factor: 6.395 at 4 ohms  
• Frequency response: 10Hz – 27kHz (–3dB)  
• Maximum input signal: 6V  
• Maximum sensitivity: 100mV  
• Output regulation: 0.03dB at 4 ohms  
• Dimensions (L x W x H): 13-1/4" x 10-1/4" x 2-3/16"  
(337mm x 261mm x 56mm)  
• Fuses: 25A x 2  
MA6002  
• 60W RMS x 2 channels at 4 ohms and 1% THD + N  
• Signal-to-noise ratio: 84dBA (reference 1W into 4 ohms)  
• 80W RMS x 2 channels at 2 ohms, 14.4V supply and 1% THD + N  
• 160W RMS x 1 channel at 4 ohms, 14.4V supply and 1% THD + N  
• Dynamic power: 160W at 2 ohms  
• Effective damping factor: 6.395 at 4 ohms  
• Frequency response: 10Hz – 27kHz (–3dB)  
• Maximum input signal: 6V  
• Maximum sensitivity: 100mV  
• Output regulation: 0.03dB at 4 ohms  
• Dimensions (L x W x H): 9" x 10-1/4" x 2-3/16"  
(229mm x 261mm x 56mm)  
• Fuses: 25A x 1  
A valid serial number is required for warranty coverage.  
Features, specifications and appearance are subject to change without notice.  
7
 
Declaration of Conformity  
JBL Consumer Products  
250 Crossways Park Drive  
Woodbury, NY 11797 USA  
We, Harman Consumer Group International  
2, route de Tours  
72500 Château du Loir  
France  
declare in own responsibility that the products  
described in this owner’s manual are in compliance  
with technical standards:  
© 2006 Harman International  
Industries, Incorporated. All rights reserved.  
EN 55013:2001 + A1:2003  
EN 55020:2002 + A1:2003  
JBL and Harman International are trademarks of  
Harman International Industries, Incorporated,  
registered in the United States and/or other countries.  
Klaus Lebherz  
Harman Consumer Group  
International  
Part No. MARINEAMPOM2/06  
Château du Loir, France 2/06  
www.jbl.com  
 

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