Subwoofer or sub is really important to reproduce bass in a speaker. To improve your car audio system, subwoofer really necessary. A component sub canincrease a level of your music sound which can’t reproduce by the other speaker. If quality sound is the most important while driving a car or truck, this subwoofer is all you need.Not all the car producing with subwoofer, especially when its just a standard car. That’s why, when you turn on the speaker in your car, the sound isn’t hype up. If you really want to buy a sub, you have to consider about the size. There are 4 category of subs, which are 8”, 10”, 12”, and 15”. The greatest size, 15” serve you with the greatest sound ever. But, you must be careful because the 15” size can really disturbing even can waking up a neighbors. The best car subwooferssize are the 10” or 12”.