How would air cored ring inductor Pleiades filters sound like?

This is on connecting an inductor at the output of a microphone in order to reduce bass heaviness. The same can be done to a bass guitar pickup in order to reveal mid and treble detail content etc.


Air core winding is inspired by the Dandridge air cored decade inductor box D13A. It works but hum pickup is tremendous. In fact one can walk in a room with D13A connected to Sony TC-D5 Pro mic input and hear the low freuency electromagnetic field content in space due to man made noise etc.


Air core inductors use very long wire to achieve said inductance. So resistance is associated too which can be a good thing as the filter becomes a Pleiades (R,L) even gentler slope high pass. Typically at 300mH resistance can be 100-200 ohms.


But what about hum? If they are wound like a toroidal power transformer it should be eliminated as the coil now becomes a hum backing coil of itself.