Summary: These speakers are really clear coming out of an aftermarket head unit. I haven't noticed any distortion at high volumes. They produce frequencies below 60 Hz but it isn't their strong point. Having a crossover cut off everything below 70-80 Hz works well.
Pros: Waaaaaaaaaaaaay better than the factory drivers.
Summary: These are really great mid range speakers, I have these in the rear doors of my 2010 ext cab Silverado, I have the 6 3/4 in the front doors. The mids and hi's are crisp and clear. Cleared up all the distortion I was getting from listening to guitar heavy music.
Summary: Definitely better than stock speakers. They're not hard to install at all. It's nice how clear the music is through them. They are, without a doubt, awesome speakers for the great price you pay for them. You can't go wrong with Crutchfield.
Summary: I purchased these as a replacement to the back door speakers on my 2003 Jeep Liberty at the recommendation of a local audio store. Shipping was very fast and installation was simple. I think it took me less than an hour to install both speakers using the included speaker adapter.
Pros: Great sound, quality built, easy installation.
Summary: Excellent speakers for the money. Mids are clear, the treble is not super harsh and you can get a surprising amount of low-end thump and boom out of these given the fact that they're 5" speakers. Are there better speakers out there? Of course there are.