I installed a avic f700bt in my sons car. Everything seems to be working correctly except the voice navigation is muffled when it gives you the waypoints, when he receives a phone call you can barely make out what they are saying due to it also being muffled . As far as the speakers playing music it sounds fine. Is there something I am doing wrong? Any advice would greatly be appreciated. THANKS

I figured it out. Nav voice and bluetooth sounds come from front speakers. I didn't have them wired in at first. Finished wiring everything in and tried everything out and everything worked as normal.