Ubitx audio Vogad/AGC

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Hello everybody, I use and SL6270 as a mic preamp/compressor. As essentially is a sort of AGC and, in my opinion, works really great at the mic input, I am thinking of adding at C222 of my ver.3. would It possibly work? The input and output impedance are about 600 ohm, It delivers about 100mv RMS and the input level can be anything between 0 and 100mv. Would 100mv enough for high impedance headsets?