I installed these speakers in both the front and rear doors of my 2007 Ford Escape and was very pleased with the sound quality. The speakers perform very well and I am satisfied with their output. I have used these speakers for about a half of a year, and have noticed that I would like more bass. It is not that the Kicker speakers do not put out enough bass, it is just that there is not enough bass to make the sound feel "full". If you are someone who likes rap or other bassy music, you will definitely want to invest in a subwoofer to compensate for lower bass output from the speakers. The speakers are just not meant for bass output. However, for someone who listens to rock or other music with less bass; these speakers will do a fantastic job of delivering high quality sound. Overall, I am pleased with these speakers and the service from Sonic Electronix.