When creating custom car speaker systems for your needs, there are several points you need to take into consideration. Some of those considerations include how much money you can afford to spend, the type of music you prefer to listen to, as well as how large your vehicle is.
The main rule for choosing speakers is size. The more bass you want in your music, the larger the subwoofer you will want to get. If you prefer the boom of hip hop or rap, a 15 inch subwoofer should be plenty, although for rock and country music, a 12 inch with its sharper crisper sound should suffice.
10 car speaker systems and 12 car speaker systems take up a lot of space. If you have an SUV, you can fit a lot of speakers into the vehicle, but a VW Passat will not fit as many. Subwoofers are usually housed inside of their own box. This is due to sound quality more than for any other reason, so before purchasing a huge subwoofer and a 12 car speaker system consider how much room you have to work with.
Money is a big factor in any custom stereo project. A decent system can cost thousands of dollars or as little as a few hundred. Before shopping for components, decide how much money you can afford and stick to your budget.
What is important to you? Do you need a video system for the kids, mp3 capabilities because all of your music is on your iPod, or perhaps you want a head unit that has Bluetooth capabilities?
Remember when choosing your perfect system that it is not a 10 car speaker system or a 12 car speaker system that is important, it is the type of music. One subwoofer systems work best for classical music, classic music, rock and country while 2 subwoofers may be best for rap, R&B, and techno.