hello….got your question. I know the problem very well and my connection is very complex. Anyway, my mic signal to the H9 is after a preamplification from a Bose Tonematch mixer. So, no problem for signal level and impedance. 

I also tried to turn the gate off in the eq compressor….again, no results…:(

really cannot understand WHY this algoritm doesn't work!

hope you can help me