Icom 802 headphone trouble?

[PassportJoy]

I have an Icom M802 that is transmitting and receiving great. When I plug in my stereo headphones I hear my own voice coming back through the headphones when I transmit. My voice sounds as though I am underwater or off frequency (kind of cartoonish) . I have tried plugging in a stereo to mono adapter with no change. I do use the "function" 4 key to turn off the speaker... Help?

Jeff

[Auspicious]

My first guess would be that RF is getting into the headphones. Try ferrites at both ends of the headphone cable, or replace the headphone cord with something better shielded.