I've got subwoofers, but when i put the subs in i didn't really have money for component speakers... but now i actually need them, because (my friends that have ridden with me back me up on this) you can hear the quality of the music isn't good at all coming out the stock speakers... so i'm thinking, can't i just get two 6x9s and two 4x6s, and put them in the place of the stock speakers, and won't they sound good? Obviously since they're still being run by the head unit (powered) and not by an external amp, they won't be able to get as LOUD, but they'll still have the quality, won't they? What kinds should i get? Please, i don't want to spend a fortune on these speakers, i'll be buying them on Ebay, and i don't want to pay a lot, because i just plain out don't have the money. I was thinking Infinity Kappas? i've heard a lot about them.
Also, once i've got those four speakers hooked up, i was thinking of putting two tweeters (possibly four?) in the car, probably at the four corners of the headliner. how do tweeters work? how are they powered and where do they connect to on the head unit? (i don't have an external crossover)
In the future, i'm planning on pulling all my midrange (OK, everything but the subs) to an external amp... i also would like to add two more 6x9s to the rear deck (making four altogether)... i've heard of a lot of people doing this, actually, i've heard of a lot of people doing a lot more than just this (i.e. putting 5.5"s on the doors, etc.)... would i get very good, extremely clear sound with the four 6x9s and the two 4x6s? (plus the two or four tweeters)?
Let me know, i'm very new to this aspect of car audio