MA6004
MA6002
MARINE AUDIO
POWER AMPLIFIER
OWNER’S MANUAL
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The Official Brand of Live Music.
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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
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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
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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
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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
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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
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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
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