Midline system speaker upgrade
I'm trying to figure out a cheap/good way to upgrade my speaker system, which currently sounds like crap, and one speaker somewhere is definitely blown out. I'm a broke college student and I don't want to pay for an amp or anything. I believe I have the midline system (I have the sail speakers and they have no logo). Is it possible then for me to simply swap out speakers? Are the midline sail speakers full range like the infinitys or are they tweeters? Also, how about the lower door speakers? I would love to be able to buy a component system but obviously I can't put tweeters where full-range speakers are supposed to go. Any help would be appreciated.