Wire or RCA
Connector
Function
Bare Wire
Color or
RCA Label
Name
Notes
Amplifier on Blue Connects to optional external
amplifiers, enabling them to turn on
when the stereo turns on.
Telemute Brown Activates when connected to ground.
For example, when you connect this
wire to a compatible, hands-free
mobile kit, the audio mutes or the
input switches to Aux1 when a call is
received and the kit connects this
wire to ground. You can enable this
functionality 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
Zone 1 line out
(left)
Zone 1 line out
(right)
Zone 1 subwoofer
out
ZONE 1
ZONE 1
SUB OUT
Provides output to an external
amplifier, and is associated with the
volume control for zone 1.
Each subwoofer cable provides a
single mono output to a powered
subwoofer or subwoofer amplifier.
Zone 2 line out
(left)
Zone 2 line out
(right)
Zone 2 subwoofer
out
ZONE 2
ZONE 2
SUB OUT
Provides output to an external
amplifier, and is associated with the
volume control for zone 2.
Each subwoofer cable provides a
single mono output to a powered
subwoofer or subwoofer amplifier.
Auxiliary in 1 left
Auxiliary in 1 right
AUX IN 1 Provides an RCA stereo line input for
audio sources, such as a CD or MP3
player.
Zone 3 line out
(left )
Zone 3 line out
(right)
Zone 3 subwoofer
out
ZONE 3
ZONE 3
SUB OUT
Provides output to an external
amplifier, and is associated with the
volume control for zone 3.
Each subwoofer cable provides a
single mono output to a powered
subwoofer or subwoofer amplifier.
Zone 4 line out
(left)
Zone 4 line out
(right)
Zone 4 subwoofer
out
ZONE 4
ZONE 4
SUB OUT
Provides output to an external
amplifier, and is associated with the
volume control for zone 4.
Each subwoofer cable provides a
single mono output to a powered
subwoofer or subwoofer amplifier.
Auxiliary in 2 left
Auxiliary in 2 right
AUX IN 2 Provides and RCA stereo line input
for audio sources, such as a CD or
MP3 player.
Connecting to Power
When connecting the stereo to power, you must connect both
power wires. You should connect the yellow power wire directly
to the battery. This provides power to the stereo and a constant
trickle-power standby feed.
You should connect the red signal wire to the same battery
through the ignition or another manual switch to turn the stereo
on and off. If you are not routing the red wire through the ignition
or another manual switch, you can connect the red wire to the
yellow wire, and connect them both to the positive (+) battery
terminal.
You must connect the power wires to the battery through a 15 A
fuse or a 15 A circuit breaker.
If it is necessary to extend the yellow power and black ground
wires, use 14 AWG (2.08 mm
2
) wire. For extensions longer than
1 m (3 ft.), use 12 AWG (3.31 mm²) wire. If it is necessary to
extend the red wire, use 22 AWG (0.33 mm
2
) wire.
1
Route the yellow power
À
, red signal
Á
, and black ground
Â
wires to the battery, and route the wiring-harness plug to the
stereo.
Do not connect the wiring harness to the stereo until all of the
bare wire connections have been made.
2
Connect the black wire to the negative (-) battery terminal.
3
If you are routing the red wire through the ignition or another
manual switch
Ã
, connect the red signal wire to the ignition
or switch.
4
Connect the red wire to the yellow wire, install a 15 A fuse
Ä
as close to the battery as possible, and connect both wires to
the positive (+) battery terminal.
NOTE: If you are running the red wire through a fused switch,
it is not necessary to connect the red wire to the yellow wire
or to add an another fuse to the red wire.
Speaker Zones
You can group speakers in one area into a speaker zone. 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.
Up to two pairs of speakers can be connected per channel of
each zone, in parallel. A zone can support no more than four
speakers using the on-board amplifier.
Zones 1 and 2 are powered by the on-board amplifier. To use
the RCA line outputs and the RCA subwoofer outputs for zones
1 and 2, you must connect external amplifiers.
Zones 3 and 4 are available as line-level outputs only. To use
the RCA line outputs and the RCA subwoofer outputs for zones
3 and 4, you must connect external amplifiers.
You can set the balance, volume limit, tone, subwoofer level,
subwoofer frequency, and name for each zone, and configure
other zone-specific settings.
Apollo RA770 Installation Instructions 3