'Auto Radio and Stereo Systems' are installed in automobiles and are used as sound or video systems. Auto radio and stereo systems use 12 volt power supplies for usage in cars, buses, etc. The stereo systems are mostly used in cars and are placed in the dash panel which is between the driver and the passenger. The auto radio systems in San Marcos have sub-woofers which are of low frequency and they do not violate any noise regulations.
In San Marcos, nowadays motorcycles and even bicycles are fitted with the audio and stereo systems. The car audio and stereo systems consist of MP3 players, CD-radio and other types of sound system. Speakers, amplifiers, sub-woofers, etc, form the parts of audio and stereo systems in San Marcos.