The scenario
A stereo audio source must feed a local headphone output and a broadcast monitor through transformer isolation to prevent ground-loop hum and protect equipment.
What is in this drawing
Read the decisions behind it.
01
Use 1:1 audio isolation transformers on each channel for galvanic separation.
02
Split each source with series resistors to avoid loading between direct and isolated outputs.
03
Terminate the isolated monitor output with a 600-ohm load and the headphone output with a 32-ohm load.
When splitting a stereo line or headphone signal for simultaneous local monitoring and isolated broadcast feed in professional audio setups.
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