Version 16.10 AF-6600 AF-5000 Series Install Manual 58
* == While the audio grounds labeled with a * ultimately come back to the main ground on pin 1, they
should NOT be wired directly from the source audio device to any ground (pin 1 or otherwise) directly.
Instead, to minimize noise and interference, their ground lines should be routed with their audio signal
inside the required shielded cable as far as possible and connected to ground as close to the intercom
as possible. Connecting these grounds to the shield (which is also grounded at pin 1) at the intercom
end of the harness is a suitable way to accomplish this goal.
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