Thanks for the thorough reply. What needs further mentioning and explanation is the fact that mis-matching impedances between mic and pre increases distortion. Another aspect: electronically balanced, rather than component or transformer balanced, mic output configurations, regardless of their theoretically superior linearity, are more susceptible to noise.
Hello George,My sincere compliments to jump into the deep.May I suggest for you to get acquainted with electronics before you go on designing circuitry.This is not meant to discourage you but to open a whole new world of possibilities to you.The dc resistance of a transformer is not of major importance for the application in audio.