Today I started to add the Garmin stack components to the panel. I carefully confirmed the wiring to the audio panel and powered it up. I was able to hear myself on the head set. I plugged in an Ipod to the 696 connector and was able to get background music. I noticed an slightly annoying switching of the vox that I couldn't explain. Overall, the audio panel seems to work. I did not have the sticks wired in, so I could not activate the push to talk .