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. I think these little speakers sound really good. Even though my stock speakers were 6 3/4, I purchased these smaller ones based on the recommendation.
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. Are these great speakers for the price you'll pay? Without a doubt.
Summary: Great speakers, produce beautiful sound, it's immersive, which is what I was looking for. The highs are high, and the mids are clear. Paired with a KDC-X997 I get amazing sound from these speakers, and that's without being powered by a 4 channel amp (for now). These speakers are built very very well. I can open up the doors on my truck, put the volume up to 26 and have music playing behind the truck and you can easily hear everything in the song.
Pros: Sound amazing, and produce alot of sound. Built well.
Cons: Seems as though these speakers are made to be part of a complete system, in which I mean it's assumed your adding or already have a subwoofer.