I’m new, comin’ to this party late but...
I think someone covered this but 15dB boost @ 58hz suggests a room mode - sound waves canceling each other at the mic’s pick up place
Anytime time I see boost more than 3-4dB I get concerned especially below 50* hz. Many years ago someone said or wrote using EQ: “think of yourself as a wood or stone carver - remove what you don’t want - the peaks.” W/that mindset you will very slow to boost at any frequency.
*as frequency falls, when boosting, power demands increase 3-5 fold YMMV
thanks for reading this far, hope this helps.