One of the main and important accessories for a car stereo is the audio capacitor that helps in gathering power for the amplifier to produce quality sound for music lovers. To hear thriving bass, audio capacitors are a practically required accessory. The reason for this is that bass notes use up a multiple number of times more power than treble (high frequency) notes. When bass notes hit, the amplifier needs to be supplied with enough current from its power source, the car battery, to power the speaker quickly enough. However, the response time of most car batteries to supply current fast enough is not adequate.

This all happens in a fraction of a second, but some bass notes can hit so quickly that the car battery cannot handle them, so those notes would be missed because the speakers were not supplied enough power by the amplifier. This problem is solved by adding power capacitors. The power capacitors store excess power from the car battery, and when a bass note hits, the capacitor supplies it. Since the response time of the capacitor is much faster than the response time of the battery, these bass notes can be nicely sounded through the amplifier and speakers. This is the case, even with fast, repeated, heavy and loud bass notes, as many hard rock or rap music CDs will demonstrate. The range of car audio capacitors is generally from .5 farads to 3 farads.

After iPod came to the market, it immediately became the cynosure in the eyes of the music lovers. With the iPod came accessories like integration cables intended especially for car iPods. This cable allows the user to control the iPod straight from the head unit itself.

In addition, the integration cable offers high speed and gives total control over different functionalities of the iPod. This cable is flexible and long enough to be placed anywhere in the car. They are very easy to install and allows the user to get more from your iPod.

Another accessory is the CD changer, that lets you store and switch between dozens of CDs. You can set the player to either random play or sequential, or program it like a juke box to play the choice and selection of CDs that you want without having to remove and reinsert each CD one at a time. That can be an even greater asset while driving, because with your hands on the wheel, you cannot reach over very easily and change CDs again and again. The CD changer, on the other hand, can hold and switch between dozens of CDs without a problem.