I installed this on
Ford Focus

Review
I purchased a set of four DCX 690.3's to replace the factory speakers in my ride. My intention was to replace the entire factory sound system piece by piece, but once I installed these speakers I realized I didn't need to change out my head unit or add an amp. These speakers sound perfect with the factory Head Unit. I can turn the Head Unit up to maximum volume and the Hertz speakers can handle it with no distortion. When I first installed them, I had a raspy popping sound, but I realized the factory subwoofer was still connected. Since disconnecting the Sub the sound has been perfect! These speakers pick up the bass perfectly, so I decided not to add a sub at all. The sound isn't competition quality, but more than what I'll ever need. Perfect full-range speakers for the average listener. Purchasing these speakers saved me a lot of money on replacing the rest of my system. Thanks Hertz! You have a new fan!

What I like
It had provided the awesome sound quality for my sound system.

What I do not like
Requires professional help in installation to give optimum performance.