Conclusion: This is my first experience with Kenwood and I couldn't be more satisfied. The range is awesome, much better than my stock, and the instructions made it easy to install. Minor altercations were needed though. Other than that, very satisfied. Sonic had a helluva deal on them as well. I would recommend!
Conclusion: Put these speakers in my front fairing on my harley street glide. Awesome sound and clarity over stock speakers. Look at the Rockford forsgate pbr 300 x4 amp bought this system for 1/2 of retail here locally. Ecellent customer service very knowledgeable of products and applications.
Summary: Installed in 09 Silverado with a Kenwood DNX-891HD head unit. Sound is very clean and bass comes thru nicely. Brackets that come with speakers will work with the factory hole but it takes a little ingenuity, once I figured out how to get the bracket to work install was a piece of cake
Pros: Sounds clean and good bass
Cons: Would have been nice if someone would have made a bracket to install in backdoors like the one that are made for the front doors
Summary: Bought these speakers to replace the awful speakers that came in my 2010 silverado. They fit perfectly with the installation gear provided from crutchfield. The sound wasn't as great as I was hoping for, but still a lot better than what I had. All and all these speakers are worth their price tag.
Summary: Installed four KFC-X173's and the XR900-5 in my 2012 Hyundai Sonata Turbo. I kept the factory head unit with navigation. The sound is really nice and clear. The speakers can take the power without breaking up. I am having a custom 12 inch fiberglass subwoofer box built that will use the Kenwood KFC-XW1200F for bottom end. While the 173's sound really good they are not made for low end bass. I highly recommend these speakers.
Pros: Clarity / smoothness
Cons: They do not produce low end bass, but they are not designed for that purpose.