Intro Car Audio Guide?
 

Is there a guide somewhere to understanding everything that goes into a car audio system and how to begin doing your own upgrades? I'm pretty new to all this and not quite sure where to start. Thanks!

The12volt.com has a metric f@ck ton of info, ranging from beginner to advanced.

diymobileaudio.com is a good site

http://www.bcae1.com/ is og when it comes to car audio interwebs stuff.