My wife gave me a Garmin Nuvi for my birthday so as to have a GPS with us on our all too infrequent trips out of town. I wanted it mounted on my Spyder, but it was almost useless not being able to hear it . So I ordered an Aquabox and the applicable mounts to mount it between the bars. This solved the non waterproof problem. I then mounted a microphone from an old helmet set behind the GPS inside the box and wired it into the wiring harness for my Autocom. Now when the Garmin talks, the stereo mutes and I hear my directions clearly. It works slick and didn't cost an arm and a leg. 
