Hello, new to the forum...

I'm in the process of outfitting a new boat, I'm looking for a headunit that would hopefully allow me to listen to my music at times at high volumes, but when a call came through on the VHF radio, the audio would mute and the VHF call would broadcast through the stereo speakers.

The VHF radio I have orderd has an auxiliary output that is typically wired to an external speaker.

Alpine shows a feature on many of their headunits called "Audio interrupt: audio interrupt input" but I cannot find any details on how to use this input lead...it sounds like what I'm after, but I just can't find any info on it.

I'd prefer Alpine, but if you are aware of any other make that may suit my needs, I'm wide open.

Thanks for your assistance,
Matt