Tried new David Clark X11 in an Embraer 145. Intercom was very muffled.
ATC a bit muffled, especially the frequencies that are bounced off a relay station or 8.33 channels.
Intermittent feedback noise to other Pilot who was using a David Clark H10-60.
The X11 has a new design mike that I think is causing incompatability.
I used a Sennheiser HME100 previously. No problems.
Might try the new Sennheiser HMEC 460 ANR. Seems to have the same Mike as the HME100. It has a 10 year warranty.
Anyone tried this or the previous HMEC 450?