Setting up a car audio and video system could be a very exciting and pleasing task, if you know the fundamentals
In order to make your dash look cooler and supply yourself with a better CD deck to expand your choices when hearing music, it's a good idea to purchase an aftermarket radio. Most aftermarket radios incorporate a CD player, choices for listening to music with your iPod or MP3 player, satellite radio and more.
Before you purchase your speakers, you need to make sure which size speakers your car has. You can just search the type of car you have and will easily find the solution.
If you're planning on making use of your factory CD player, be sure not to purchase over powerful speakers. Your in-dash receiver that included your vehicle will never supply enough power.
If you do desire to use powerful speakers, you're going to need car amplifiers. You can either replace only your front speakers and then leave the trunk powering off the deck, or replace all. If you replace only the front, you will need a 2 channel amplifier. Should you replace all, you will need a 4 channel amplifier.
You have to make sure that the RMS power output on each channel from the amplifier matches as close towards the RMS power input of each speaker. Why? Since this is the way it must be. Do not under power or overpower your speakers.
If you are likely to give a subwoofer or perhaps a set of subwoofers, you'll have to buy an amplifier to supply them lots of watts. Just one subwoofer setup should provide enough bass for the entire system, even if upgrading all speakers and taking advantage of a guitar amp to power them.
A decently powerful 12" subwoofer is going to hit hard for rock music and also produce lower and deeper bass for hip hop and rap. If you are using a set of subwoofers, you're probably likely to create double the amount bass.
You can learn a lot more details about car audio if you want. It's not putting it together that makes it probably the most fun, it's hearing it after it's completed.