My 1990 GL1500 has the stock audio cable to feed the helmet. I guess it's 5 pin, but I'm not sure. My 1982 has a new stereo that has a regular audio out jack for a headset, same am my iphone and all the other audio gadgets out today. I need an adapter so I can come out of the car stereo and plug into the helmet. I don't care about the microphone part of the cable, just want to be able to listen. I don't see anthing like it at the usual electronics web sites, but I could be missing something. Thanks in advance.