I have two pairs of the C3 650's in my Nissan 350z and I love them! At first I was considering the C2 650's but once I heard these over them I knew right away the C3's were 10x better then the C2's. Don't get me wrong the C2's are good too but these just have cleaner sounding highs and mids. They can get pretty loud because of this however it will not sound nasty crackling loud it will definitely get you noticed in the way that you want to be noticed and not in the way that you don't. I also compared the C3's to the C5's and honestly I chose this over the C5's because for one the C5's are almost $100.00 more per pair and two they only sound a teeny tiny bit better that's all! By better sounding I mean the high's are not as loud as the C3's so it doesn't fatigue your ears if you listen to them at high volume for extended periods of time. I run 4 C3 650's in my car along with 2 10W3V3 subs in a stealthbox and a 900W Kenwood amp to power them all up and my car sounds like I'm front row in a concert of whoever I am listening to at the moment. 5 stars on these speakers JL great job! 5 stars on my whole setup about 80% JL product. Don't believe the "overpriced" crap. Yeah they run a bit on the expensive side but their products are so worth it, you get nice clean LOUD quality sound. Something most brands can't offer, it's either SPL or SQ.