One of the first things you need to do is decide what type of system you want. Do you want one that can reproduce your music so that it sounds like you’re at a live concert? Or do you want a system that can simply blast out a bunch of bass? Maybe you want a system that can do both. By starting with a goal in mind, you can save yourself from potentially wasting money on components or wasting time on designs and installations that don’t fit your overall objectives.
Do your homework by researching which components fit your car (the size of the speaker and the factory-radio openings) and best accomplish what you want your system to do, what they cost, and where they’re available. Information is power, and the more information you have, the more you’ll be empowered to make the best decisions on equipment and system design