If my car already has tweeters installed is it necessary to buy 2way speakers?
If the tweeters are the ones that came with the car from dealer then you will benefit from replacing them with aftermarket ones. You could buy a component set which will be tweeters and midrange speakers. Some midrange speakers are 2way, some are not. If you plan on amplifying these speakers then buy component set with crossover. Plus nowadays 2 way and even 3 way speakers can sound really good. I prefer component with tweeters and midrange speakers. No 2 way for me.
