these speakers carry awesome bass and were a HUGE improvement over the factory speakers in our 2000 Honda Accord EX. with the new JBL's in the rear deck, the factory speakers in the doors and the factory tweeters in the dash, the sound is well balanced. my son had an unused Sony amp in the garage and I toyed with the idea of hooking that up. don't bother, these don't need to be amped. the head unit I have is only 18W/channel and it is plenty loud with zero distortion. I went JBL because of their reputation, but I was a little skeptical because of the low price. worry not, the quality is there.
Pros: crisp, clean bass with no amp needed. easy install. big, heavy magnets and quality construction.
Cons: it's probably the EQ on the head unit, but the tweeters can be a little sharp at times - too many other factors to blame the speakers for sure.