input impedance ratio - mic frequency response

Thread Starter


Joined Jan 16, 2014
Hey, in this graph im attaching here is showing that if one do a 1 to 1 input impedance to output impedance of a dynamic microphone and an mic pre amp the low and high frequency response of the mic is reduced but the middle frequencies stay intact....

I would like to understand why just low and high frequencies get affected but not the mid ones????



Joined Dec 13, 2013
possibly because of loading on the windings in the microphone. less load with a much higher impedance. current load affects the mechanical load on the diaphram