Conclusion: These speakers are way better than I expected. Especially for the size of them. I bought just a pair for the front and left my crappy speakers in the back. cranked the fader up to about 7. musical glory.
Summary: Crisp and clear sound, with JBL quality and good price. I had to buy this one because I can only use 4x6 inches on my car. This obligation led me to the ultimate happiness : my car now sounds like a concert hall!