Found some more info (added external pre-amp) here: https://www.openacousticdevices.info/support/device-support/replace-the-mems-microphone

NB: I just noticed that you already provided some info on the microphones used in hardware v1.2.0 in another thread: https://www.openacousticdevices.info/support/device-support/calibration-curve-for-audiomoth Thanks for that - it partly answers the questions I had! (It would still be great if you could provide links to the design files for v1.2.0 and µ as well at some stage.) Thanks once again, Pascal

@Andy / @Alex Rogers It would be great if you could provide an update on this (or point towards someone who could). Thanks a lot! Pascal