E175 echo on A20
Recently upgraded to the E175 from the E145 and from the start have been experiencing and echo of my own voice when transmitting or talking to other crew members. My A20s are 7 years old and I've never had an issue like this before. I tried cleaning the plugs and installing new batteries. I've operated 8 different E175s and have the same issue on both. Asked around the pilot group and everyone says it's the Bose headsets and there isn't anything that can be done about it. Help please.