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A live sound engineer needs to split a stereo line-level feed to two stage monitor mixes while preventing ground-loop hum between the console and powered monitor speakers.
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01
Use 1:1 audio transformers per channel for galvanic isolation
02
Load each isolated secondary with two parallel 10k monitor inputs
03
Keep left and right isolated grounds separate to avoid crosstalk
When distributing a balanced or unbalanced stereo line signal to multiple monitor destinations where ground potential differences or hum are likely.