I needed a set of 4" speakers for my Kia Sportage as the old ones finally gave out on the surrounds. I was looking for an efficient 2-way speaker and the Rockford's provided that in spades. They have good response across the spectrum and are easy to eq-out. While 4" speakers don't excel at bass these are definitely adequate. The polypropylene woofer with it's rubber surround will give years of service in a car door, the tweeter has a good clear sound, their power handling and efficiency are up there. They really fit the bill for my needs. I would heartily recommend Rockford Fosgate R14's for those tight automotive spaces. They are a winner.