my 99 accord ex coupe has two 6.5 stock door panel speakers with 2 tweeters (i think) on the dash. they are so called "premium speakers" but i doubt that. if i buy a $200 pair of alpine speakers (w/ tweeters) how much of an improvement would that be without them being powered by an amp? headunit : alpine 9811 i dont need the rear speakers changed. i dont want the aftermarket rear speakers. (they often look ugly from outside rear window and i suspect they would gain attention from thieves)