Conclusion: I put 4 of them in my 89 325I convertible. They didn't really fit correctly, I had to trim some interior panels to make them fit...but they sound amazing...hooked up to a Sony 2 channel amp..great bass and crisp highs :-) definitely would recommend to anyone.
Conclusion: i upgraded my rear speakers in my 08 scion tc with these alpine ones. i also upgraded the front with the alpine speakers too. once i installed the system these speakers really worked great! they have amazing highs that come in crystal clear. the mid is just enough to compliment the entire system and the result is fantastic. i get compliments inside the car all the time at how well they work and make it able to hear the music and not just the bass.
Conclusion: These speakers are amazing, and if amped correctly will just light up your car. I have these matched with a pair of 6 1/2 type R's as well. I am not even able to turn these all the way up because it is just too loud. My one 12" type R sub is just amazing as well. Quick and accurate. I doesn't matter what type of music you play; these speakers will do their job and do it DAMN well.