If you have a factory stereo system that you would like to upgrade, this page will prove extremely valuable. The most important upgrade to a factory system is definitely the speakers.
Most factory systems use cheap, dual cone, paper speakers.
You can also get speakers with the cones made of stiffened paper, polypropylene, as well as many other exotic materials which can improve the sound quality and durability of the speakers. One word of caution however, if you are not going to add an amplifier, or at least replace the factory stereo, you will want to remain conservative with the power ratings of the new speakers. You do not want to get 300 watt speakers if your factory deck has a typical output of around 20 watts. Click on a car manufacturer to see a list all of the cars produced by a company, and all of the factory speaker sizes and locations for each car. If you find any mistakes or would like me to add anything to the list, please send me a message .