New Grmin.. I just bought it.. I have it paired to an interphone F5 headset.. The headset is great when not used with the Garmin.. The Garmin is like muted or something.. Can't hear it.. or the XM radio at all.. even when stopped.. barely audible.. I went to the Garmin web site.. found some help in the troubleshooting.. everything was already at 100%.. I don't get it.. seems like an obvious easy fix.. Is it me or is this an issue with this unit? Wondering if I call their help desk that there is a fix I am missing.. I have updated the unit soit's not an issue with that..