Speaker Out Connector; Speaker In Connector - AOR ARD9000 Instruction Manual

Color
RED
BLACK
i. SPEAKER OUT Connector (3.5 mm mono jack)
To connect an external speaker (not supplied). Once connected, the speaker-
microphone-s speaker is disabled.
j. SPEAKER IN Connector (3.5 mm mono jack)
Connect to the transceiver s speaker output with the supplied cable.
(Input level: 0.5V ? 5V p-p, input impedance: 8 Ohm)
Do not connect other audio sources like your radio s ACC-connector or
LINE-OUT as audio levels are insufficient for the ARD9000 to function
normally.
Polarity
Positive (+)
Negative ( - )