Mark, You will need to be very careful when using a Mic Pre-amp into the KN's Mic input. You could end up overloading the Mic input circuit and causing distortion.

If you are using Panel Memories in your set-ups, you can set the 'On-screen' Sequencer/APC volume slider to a lower level and re-save all your Panel Memory settings. Leave the physical APC/Sequencer slider set to maximum. Using the Panel Memories to set the parameters during your performances, should correct the balance problem which you are experiencing.