Im wondering if anyone has experienced this problem : I am hiring the local school savanaha s which has a xcomm radio approx 2 mths old and when I plug in my bose a20 headset l can hear everything thats going on but when l try to transmit the tx sign comes up but no audio is going out, the other pilots say they can hear the carrier but no audio. The cfi did a master reset before any flights on saturday and the radio worked fine until l came along and when l changed headsets the radio wouldn't tx and wouldnt on the others that had been fine earlier, l then gave another pilot the bose to check in his Aircraft and they functioned perfectly so it would seem as if they are not comparable to the xcom any clues?