What about the music-playing unit installed in a car's dashboard? I can't think of any term for it besides "car stereo" but would young people refer to is as a "car speaker?" The head unit in the dash that contains the controls but no speakers wouldn't be called a speaker, would it?

none of my friends really have a car yet, but I'm pretty sure I've heard it being called just the "car speaker", or "the car" (as in, "connect to the car"), mostly because i haven't seen people actually use the dashboard, and that because younger people don't carry music flash drives with them