So with the setup that I'm going to suggest, the sound will play through the headset and the stereo speakers. That's because you're of course going to need a microphone in order to broadcast over the radio so you'll need a headset. Anyways, first you'll need the intercom, the hub of this project. I suggest the
RRP660 as it's full featured and lowest priced of our offroad VOX operated intercoms.
Then you'll need the
cable and headset (
over-the-head or
behind-the-head). x2 if you have a passenger.
This right
here is the jumper cable (we have a shorter version if you don't need that much cable between the radio and intercom) that integrates the radio with the intercom.
Then of course
the PTT to key the radio.
Now the part that will output the intercom audio to your stereo.
CS-MUSIC-REC. This cable plugs into the 6-pin aux port on the back of the intercom. Normally used to output audio to a camera for in car video and audio, but it can be hooked up to a stereo system using the red 3.5 mm plug that comes off of it.
Basically when all this is hooked up, you will want to play your music through the intercom music port. This will then forward the music out the "record" cable to your stereo system. This will allow music to play over the speakers (and through your headset), then when you receive a transmission over the radio, the music will automatically lower so the transmission can be heard over the speakers.
Did that make sense?