This is a tough review to post. I'd read on forums and such very diverse opinions on speakers and audio head units, which makes the bigger difference. I can clearly say the head unit being replaced in my 2011 Scion xB was the biggest improvement. It brought the audio system to life. But, I had already bought these Kickers for all 4 doors, so, I wanted to complete this leg of the journey to see the further improvement. So, the install was fairly easy, thanks to Crutchfield (again). Cranked up, they do offer obvious clarity and quality over the stock speakers, especially the rears. I do have to say, still, that they seem to be fairly easy to push too hard with bass. Being a bass player and drummer, and music producer, I like DEEP bass I can hear AND feel, and crystal clear highs. These speakers have a good range, but I still seem to think I need to add the subwoofer. Can pound these with bass, as I'd hoped I possibly could. Solid B to B+ grade for this price range.
Pros: Great, clear sound that's punchy and can be warm.
Cons: Easy to push too hard with bass, for my taste. Might still want a sub, if you like tons of bass, bordering on overkill without ruining overall mix.