I have a Garmin ZUMO 665 that is wired to my Boom Audio. I play my music and receive directions through the boom audio. I recently purchased the G4 Power Set to communcation with my wife and ofther riders. My question is:

Can I set of these devices so the music comes through the boom audion speaker, yet all GPS instructions, phone call and rider to rider communcation comes through the Scala G4? Right now, it all comes through the headset, but the music quality is so poor on the headset, I'd rather have it come through the boom audio speakers.

Any help from those of you who have experince with this would be much appreciated!!!