[Elecraft] Dynamic Mics on K3

[Giulio Pico - IW3HVB]

I'm trying to use a dynamic mic with the K3 (KIO3 MIC INPUT high gain) 
but I can't be satisfied with the modulation (I'm listening with another 
radio on 144 MHz using an XV144 with the K3).
If I keep the compression level below 15 the mod is awful. Tried with 4 
or 5 different dynamic mics, but the results are almost the same.
I made a couple of ipothesis:
Balanced Mics doesn't match too well with the unbalanced input of the radio.
The mic level is too low (I tried to push with mic gain and TXG VCE, but 
no results so far).
Any suggestion?

73 de Giulio IW3HVB