Thank you for pointing me at bias voltage, I’ve never heard of that. The text explicitly mentions condenser mics requiring that voltage. Does this also apply to dynamic mics?
Besides, even if the signal is nasty, I would like to receive that in the system. So if this is an issue, it’s currently rather a side quest.
I occasionally bumped into this dude and he has an impressive number of videos. To me, it is a case of an obvious idea to have, once someone had it.