The standard stereo jacks in my 14 work perfectly with my older David Clark headset but with my Bose A20 the microphone is fuzzy and not clear at all unless I pull the plug out a tiny bit and even then it's hit or miss. There is no continuity between the aircraft ground and the jack ground and the audio works perfectly at all times. Audio panel is a Garmin GMA245R. I wasn't planning to rewire for lemo jacks but I need this to work. Any ideas?