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49
Installing the Hardware
Disconnect the 1. accessory cable from the accessory connection on
the radio.
Connect the BLACK wire of the 2. accessory cable to the GROUND
WIRE of your external speaker.
Connect the RED wire of the 3. accessory cable to the POSITIVE (+)
WIRE of your external speaker.
Be certain all wire connections are secure and that all open wires are 4.
adequately covered.
If you are nished connecting all external accessories, line up the 5.
arrows on the side of the accessory cable and connector and connect
the accessory cable to the accessory connector on the back of the
UM425.
NOTE: To extend the life of the radio, use waterproof tape to seal
electrical connections.
Connecting to an external PA speaker
If you connect the radio to a PA speaker, you can use the PA feature to make
announcements to other boats and people nearby.
The UM425 supports an external PA speaker with the following specications:
• Minimum impedance of 4 Ohms
• Minimum power handling of 10 Watts
1. Disconnect the accessory cable from the accessory connection on the
radio.
2. Connect the BLUE wire of the accessory cable to the GROUND
WIRE of your PA system.
3. Connect the BROWN wire of the accessory cable to the POSITIVE
(+) WIRE of your PA system.
4. Be certain all wire connections are secure and that all open wires are
adequately covered.
5. If you are nished connecting all external accessories, line up the
arrows on the side of the accessory cable and connector and connect
the accessory cable to the accessory connector on the back of the
UM425.
NOTE: To extend the life of the radio, use waterproof tape to seal
electrical connections.
UM425 VHF OM.indd 49 28/9/11 11:55:22 AM