I'm starting to delve into the audio upgrade part of things with my 93 Vigor, having replaced the stock radio with a Sony AVA1 HU, and added some bass with an Alpine 12" Sub w/ Alpine 300 RMS Amp that I took out of my previous car. I read up and see that there are supposed to be tweeters between the map light on the headliner. I want to know if anyone knows how these tweeters are wired (running parrallel with the door speakers, maybe?) and is it worth upgrading said tweeters, as I'm upgrading the door and rear deck speakers with another 4-channel, 300 RMS Alpine amp I have. I don't think the tweeters are playing now, so I'm not sure how the sound stage would sound if I were to update these tweets along with the doors are rear deck.

Anyone have an advice/experience on this?