I'm sure there was one at some point? Relevant for the mortals among us at least and car audio has moved on a lot since massive subs and 50000 gigawatt amplifiers with lots of cool stuff out there now.
I can't believe we have a sub-forum just for Satellite Navigation and no provision for In Car Entertainment. I say combine them, along with radar jammers etc... 'In Car Technology' or something.
At least then I get the freedom to choose who I want to be snobby towards.