Wire Function Wire Color/
Number
Notes
Mute Brown Activates when connected to
ground.
For example, when connected to a
compatible hands-free mobile kit,
the audio mutes or the input
switches to AUX when a call is
received and the kit connects this
wire to ground. This functionality can
be configured from the settings
menu.
Dim Orange Connects to the boat's illumination
wire to dim the stereo screen when
the lights are on.
The gauge of the illumination wire
must be suitable for the fuse
supplying the circuit it is connected
to.
Speaker zone 1
left (+)
White
Speaker zone 1
left (-)
White/black
Speaker zone 1
right (+)
Gray
Speaker zone 1
right (-)
Gray/black
Speaker zone 2
left (+)
Green
Speaker zone 2
left (-)
Green/black
Speaker zone 2
right (+)
Purple
Speaker zone 2
right (-)
Purple/black
Auxiliary in left
Auxiliary in right
Provides a red and white RCA
stereo line input for audio sources,
such as a CD or MP3 player.
Zone 1 line out
(left)
Zone 1 line out
(right)
Provides a full-range output to an
external amplifier, and is associated
with the volume control for zone 1.
Zone 2 line out
(left)
Zone 2 line out
(right)
Provides a full-range output to an
external amplifier, and is associated
with the volume control for zone 2.
Subwoofer out Each cable provides a single mono
output to a powered subwoofer or
subwoofer amplifier, and one or both
cables can be used, depending on
the connection requirements of the
subwoofer or amplifier.
A connected subwoofer is
associated with the volume control
for zone 1.
Connecting to Power
When connecting the stereo to power, you should connect it
through the ignition or another manual switch.
If it is necessary to extend the power and ground wires, use
14 AWG (2.08 mm
2
) wire. For extensions longer than 1 m (3 ft.),
use 12 AWG (3.31 mm
2
) wire.
1
Route the power wire to the ignition or another manual
switch , and route the black ground wire to the battery.
2
If necessary, route a wire between the switch and the
battery .
3
Route the wiring-harness plug to the stereo.
Do not connect the wiring harness to the stereo until after all
of the bare wire connections have been made.
4
Connect the black wire to the negative (-) battery terminal.
5
Connect the power wire to the ignition or another manual
switch, and connect the switch to the positive (+) battery
terminal if necessary.
6
Connect the wiring harness plug to the stereo.
Speaker Zones
You can group speakers in one area into speaker zones. This
enables you to control the audio level of the zones individually.
For example, you could make the audio quieter in the cabin and
louder on deck.
You can set the balance, volume limit, subwoofer level, and
name for each zone.
Single-Zone System Wiring Diagram
Speakers
Water-tight connection
Complete System Wiring
FUSION MS-RA70NSX Installation Instructions 3
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