Looking for advice on improving the radio transmissions in the recently acquired Duo Discus XL.

The factory installed Microaire M760-1 radio and Bayerdynamic SHM 424 microphone work fine - if you are practically eating the mic. If your head is turned slightly no voice, only carrier.

Anyone know of a gain adjustment of some sort to make the mic more sensitive?

Thanks in advance.

Karl Striedieck