If Equalizer APO doesn't seem to work, then you can bypass the issue by installing a virtual audio driver (VB-cable), forwarding your microphone input into that, and then using Peace to amplify the virtual audio device instead.
If Equalizer APO doesn't seem to work, then you can bypass the issue by installing a virtual audio driver (VB-cable), forwarding your microphone input into that, and then using Peace to amplify the virtual audio device instead.