Buddy of mine bought a BMW motorcycle NAV system (he works for BMW so he gets a discount. It's a portable nav system, but he didn't quite forsee the issue of audio. The mount says it has a built in speaker, but we can't get any audio. The mount DOES have a microphone and audio out jacks. What is his best option to rig audio out of this thing:


Garmon Zumo 550 portable nav system.


Thanks guys.