JBL MA6004, MA6002 User Manual

MA6004
MA6002

MARINE AUDIO
POWER AMPLIFIER
OWNER’S MANUAL

www.jbl.com

The Official Brand of Live Music.

INSTALLATION

THANK YOU

for purchasing a JBL marine amplifier. In
order that we may better serve you should
you require warranty service for your
new amplifier, please retain your original
purchase receipt and register your new
JBL amplifier online at www.jbl.com.

WARNING

Playing loud music in a boat can hinder
your ability to hear other boats, passengers
and nearby swimmers and can permanently
damage your hearing. We recommend
listening at low or moderate levels while
operating your boat. JBL accepts no liability
for hearing loss, bodily injury or property
damage resulting from the use or misuse
of this product.

IMPORTANT

To get the best performance from your
JBL marine amplifiers, we strongly
recommend that installation be entrusted
to a qualified professional. Although
these instructions explain how to install
these amplifiers in a general sense, they
do not show specific installation methods
that may be required for your particular
application. If you do not have the
necessary tools or experience, do not
attempt the installation yourself. Instead,
ask your authorized JBL car audio or marine
audio dealer about professional installation.

NOTE: This marine product is not intended
for automotive applications.

INSTALLATION
WARNINGS AND TIPS

• Always wear protective eyewear when
using tools.

• Turn off the audio system and other
electrical devices before you start.
Disconnect the (–) negative lead from
your boat’s battery.

• At the installation sites, locate and
make a note of all fuel lines, hydraulic
brake lines, vacuum lines and electrical
wiring. Use extreme caution when cut­ting or drilling in and around these areas.

• Check clearances on both sides of
a planned mounting surface before
drilling any holes or installing any
screws. Remember that the screws
can extend behind the surface. Do not
use screws long enough to penetrate
the boat’s hull.

• Before drilling or cutting holes, use a
utility knife to remove unwanted fabric
or vinyl to keep material from snagging
in a drill bit.

• When routing cables, keep input-signal
cables away from power cables and
speaker wires.

• When making connections, make
certain they are secure and properly
insulated.

• If the amplifier’s fuse must be replaced,
use only the same type and rating as
that of the original. Do not substitute
another kind.

CHOOSING A LOCATION
AND MOUNTING THE
AMPLIFIER

Choose a mounting location in the
cargo area where the amplifier will not
be damaged by shifting cargo or water.
Although these JBL marine amps are
designed for use on a boat, they will not
withstand submersion. Amplifier cooling
is essential for proper amplifier operation.
If the amplifier is to be installed in an
enclosed space, make sure there is
sufficient air circulation for the amplifier
to cool itself.

Make sure that the amplifier is mounted
securely using nuts and bolts or the
supplied mounting screws.

2

INSTALLATION

NC

NO

+

12V

AMP REM

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 con­nection locations. Please adhere to
the following instructions carefully:

Ground Connection

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.

Figure 1. Terminal connection end plate for MA6004.

Power Connection

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.

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.

Failure to

Remote Connection

Connect the amplifier’s Remote (REM)
terminal to the source unit’s Remote Turn­On lead using a minimum of 18-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 acces­sories are on or when the key is switched
on. If no such circuit exists, install a
switch. See Figure 3.

Figure 3. Install a switch for the Remote
Turn-On lead.

Speaker Connections

Refer to the application guides on the
pages that follow. Speaker connections
should be made using a minimum of
16-gauge wire.

Wire Gauge Chart

Amplifier Maximum Minimum
Model Current Draw Wire Gauge

MA6002 22A #8 AWG
MA6004 40A #8 AWG
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 2. Terminal connection end plate for MA6002.

3

APPLICATIONS – MA6004

Front RightFront Left

R

ear RightRear Left

F

ront RightFront Left

Rear RightRear Left

F

ront RightFront Left

F

ront RightFront Left

The MA6004 can be set up for stereo
4-channel, 3-channel or bridged
2-channel operation, as shown in

Figures 4 through 6.

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.

Figure 4. MA6004 amplifier in 4-channel (stereo)
operation to drive front and rear full-range speakers.

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

RightLeft

RightLeft

Figure 7. MA6002 used in 2-channel (stereo)
operation to drive a set of full-range speakers.

Figure 8. MA6002 used in bridge mode to drive a
subwoofer.

5

CONTROLS AND SETUP

TROUBLESHOOTING

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 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.”

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.

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.

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

If using the MA6004 or MA6002 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
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.

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.

SYMPTOM LIKELY CAUSE SOLUTION

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 boat’s battery
or less than 8.5V on charging system
BATT+ connection

No audio Voltage less than 9V on Check boat’s
(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

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

www.jbl.com
© 2006 Harman International

Industries, Incorporated. All rights reserved.
JBL and Harman International are trademarks of

Harman International Industries, Incorporated,
registered in the United States and/or other countries.

Part No. MARINEAMPOM2/06

Harman Consumer Group International

e,

W

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:

EN 55013:2001 + A1:2003
EN 55020:2002 +

A1:2003

Klaus Lebherz

Harman Consumer Group

International

Château du Loir

, France 2/06

www.jbl.com