cars just like so many other products today can be purchased online. There are so many vendors that deal with products like these online. All you need to do is to find one or more of them so as to broaden your purchase options.
There are different types that are produced by different companies. Although they serve the same purpose, not all are good for every kind of car. The power of the sound boxes varies. Some are very powerful while others are not as powerful comparatively. The type that should be used should be the type that is most suitable for the kind of car that you would desire to have it installed in. For instance, installing very powerful subwoofer boxes in a small car may not be so much of a good idea because the sound intensity and resonance that is triggered from the sound that is produced from the soundbox may not be good for the car. This is even more so when the kind of music that is played is a song that has too much base in it.
Just as car products vary in strength and several other features, so also the various soundbox that is produced vary also. What is used in a particular car should not just be because of desire but what best suits the car? The best people to help make this decision are those that are into the car speaker business. As professionals that deal with sounds that are produced from speakers that are installed in cars and other vehicles, they would be able to help suggest which speaker is good enough for a particular type of car without causing one negative effect or the other.