Audio system in car serve as a source of entertainment. Audio systems are usually fitted in the dashboard of a vehicle.

Buying audio system for automobiles can be a more complex process than buying the vehicle. Audio components come with their own set of specifications, which may be ambiguous for a person who does not have a knowledge of them.

Points to be considered for buying Audio Systems
While buying an audio system, enough research has to be conducted regarding various components, basic terminology of audio systems, overall performance, etc. Following points has to considered while buying an audio system for a car.

• Quality of sound
• Room for speakers
• Adequate power
• Preouts for more components
• Head unit compatibility

It is always advisable to preview the entire audio system as a unit, before getting it installed in the vehicle.

Various components of Audio Systems
Audio system fitted in automobiles is usually composed of four different groups of components. They are discussed as follows:

• The Head Unit
  The head unit is considered to be the heart and soul of the system. It acts as the central processing device in the system. All changes, functions and controls are governed by head unit in the car audio system. Head unit also controls volume, bass etc. Other systems controlled by head unit includes tuner, cassette, equalizer, CD or amplifier.
• The Amplifier
  All audio systems must have an amplifier and it is not uncommon in car audio systems. Sometimes, amplifiers are attached to the back of the head unit, but in most systems it is fitted elsewhere for better dispersion of heat. Amplifying the signals is the main aim of amplifiers, which is handled by two separate components, namely, preamplifier and power amplifier.
• The Speakers
  Speakers are responsible for taking the amplified signal from the power amplifier and deliver it to our ears.
• Auxiliary Input Devices
  There are some components like CD changers and equalizers, cell phones, navigation systems, MP3 players and many of the newer technologies that interface with the head unit for amplification and signal processing.