I see a lot of people on here, trying to gain info for their first install or they are already balls deep into their attempted "install" and need help becuase they did not build a good base of knowledge before tearing their car apart. I HIGHLY recommend this book. "How to design and Install High-Performance Car Stereo" by Joe Pettitt. It gives a good bit of knowledge on all the major components involved on completing an install. I got one for around 15 bucks off amazon. Just thought I would throw that out there.