We have quite a few of these ships in our fleet and they are all configured similarly with the single cabin comm panel. I will look into that modulation adjustment on the mics and we may have to set aside a kit for "cabin only" headsets if that fixes it. There are no problems with David Clarks, or any other brand, on our standard 139
cockpit avionics systems.
@9Aplus
I think we've all experienced normal feedback from a speaker to a microphone, and thats what I tried to compensate for by trying "every possible variation of the settings" as I said. Oh, and thanks for the tip but its not me who insists on speaking from the cabin, its the customer, I'm fine doing it from my seat and the PA works great from there. If there were an additional piece of electronic phased inverter needed one would assume that the manufacturer would know this and it would be installed...
Being that Agusta sold us all these ships with this configuration, and the few I've tested are all producing the same results, we'll probably need to get their help in figuring it out. I just wanted to see if anyone has had similar experience with this particular aircraft in a similar configuration and if they found a solution.
I'm just a pilot trying to help my guys out. Thanks for the suggestions.
