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External Speaker
Your unit can play sounds to an external speaker. This feature can be
convenient any time you are away from the unit — especially in a
larger boat — but still want to hear its alarms. You might install a
small speaker at the stern of your boat so you won't miss a dangerous
Shallow Alarm while fishing, or put one in your galley so you can hear
the GPS Arrival Alarm.
You can purchase an external speaker and the wire to connect it at
your nearest audio or marine electronics store. You will need to buy
marine-grade 18 gauge stranded wire. Buy enough of one color (we
suggest white) to run from the unit's Power/Data cable to the speaker.
Buy enough of another color (we suggest black) to run from the speaker
to the battery or fuse box.
The unit is designed to work with most speakers, but make sure you
buy one that meets these minimum requirements:
• Minimum 8-ohm resistance
• Minimum 5-watt power
In your vessel or vehicle, mount the speaker wherever you want to hear
your unit's sounds. (Follow the speaker's installation instructions).
Next, connect the speaker to your unit as shown in the following figure.
Connections for optional external speaker.
The speaker should have either two terminals or two exposed wires: a
positive (+) and a negative (–) ground. Your unit's external audio
output is the white wire in the unit power supply cable. Connect this
wire to the speaker's positive (+) wire or terminal with white 18 gauge
wire. Connect the speaker's negative (–) ground wire or terminal to the
negative (–) terminal on your battery or fuse box with black 18 gauge
wire. The unit should automatically begin to play any active sounds
through the attached speaker.
Unit power
supply cable
NMEA 0183
Data cable
(four wires)
NMEA 2000
Power cable
Black wire
Red wire with
3 amp fuse
Speaker
Black speaker wire
12 volt
battery
White speaker wire
To unit
Optional power off
switch for saltwater
installations