Garmin APOLLO RA770 Installation Instructions Manual page 5

3 Install all of the necessary fuses on the red and yellow wires.
4 Connect the wiring harness to the stereo.
When you turn on the ignition switch, the stereo turns on along with other
accessory electronics. When you turn off the ignition switch, the stereo
enters a low-power standby mode.
NOTE: When you are not using the vessel for an extended period of time, you
should remove power to the stereo using the circuit breaker or other manual
switch on the yellow wire to avoid draining the battery.
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 speakers can be connected per channel (left and right) 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 frequency, and name
for each zone, and configure other zone-specific settings.
Single-Zone System Wiring Example
Speakers
Water-tight connection
Speaker System Wiring Using a Line Out
This diagram illustrates a system installation with an external amplifier and
subwoofer connected to zone 2 on the stereo using a line out. You can
connect an amplifier and subwoofer to any or all of the available zones on
the stereo.
NOTE: You can connect speakers to the speaker wires for the internal stereo
amplifier while using the line out on zones 1 and 2, although adjusting the
volume affects both the speakers connected to the internal amplifier and the
line out. This may result in uneven volume levels.
Zone 1 speakers
Water-tight connection
Zone 2 speakers
Installation Instructions
Amplifier-on signal wire
You must connect this wire to each amplifier connected to a zone line out.
A connected amplifier must use the same ground (-) as the stereo for this
signal wire to function correctly.
Powered amplifier connected to the zone 2 line out
Zone 2 line out and subwoofer out
Each subwoofer cable provides a single mono output to a powered
subwoofer or subwoofer amplifier. You may need to use an RCA splitter
to connect this to an amplifier.
Subwoofer
NMEA 2000 System Wiring Diagram
Stereo
Supported chartplotter, MFD, or compatible Fusion NMEA 2000 remote
control
NMEA 2000 GPS antenna, speed sensor, or wind instrument.
When the stereo is connected to the same NMEA 2000 network as a
compatible engine, a GPS antenna, a chartplotter with a built-in GPS
antenna, a wind instrument, or a water speed sensor, it can be configured
to automatically adjust the volume according to the engine RPM, the speed
over ground, the wind speed, or the speed through water. See the stereo
Owner's Manual for more information.
In-line switch
NMEA 2000 power cable
NMEA 2000 drop cable, up to 6 m (20 ft.)
9 to 16 Vdc power supply
NMEA 2000 terminator or backbone cable
NMEA 2000 T-connector
NMEA 2000 terminator or backbone cable
Configuring an Optional Wired NRX Remote Control
NOTICE
The stereo is configured by default to work with a NMEA 2000 network, and
the NRX POWER option should be enabled only when an optional wired NRX
remote control is connected directly to the stereo. Enabling this option when
the stereo is connected to a NMEA 2000 network may damage other devices
on the NMEA 2000 network.
If you connect an optional wired NRX remote control directly to the stereo,
and not through a NMEA 2000 network, additional configuration is needed.
1 Select > SETTINGS > POWER OPTIONS.
2 Select an option:
• If you connected both your stereo and your optional wired remote
to a NMEA 2000 network, make sure the NRX POWER option is not
selected. This enables the optional remote to receive power from the
NMEA 2000 network.
DRAFT
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