The first time we replaced the speakers in my friends car from factory we installed an amplifier and infinity kappas. Boy those sounded nice! Then he got a set set of JL's in the rear, I think they sounded very nice too, maybe even a step above kappas. Today we went into the stereo shop and listened to some mb quarts 6.5" components. Very nice, but then the shop owner played the Focal's he had. Wow. I think I can safely say these are the best 6.5" components I've ever heard in a car. They don't thud, but do have a nice bass sound. The tweeters on them are awesome though, very crisp clean sound. I'd previously never heard of the focal brand. Are they a big name? I'm not too much into the high end stereo so if they were I wouldn't know, but I've definatley heard the quartz name more. No matter what I like them though and just wanted to see if anyone else has an opinion 🙂