An auto amp, or automobile amplifier, is a device that increases the amplitude of sound signals. It is used to improve the sound quality of audio systems in vehicles. Auto amps are available in different designs and configurations, and they can be used to improve the sound quality of both factory-installed and aftermarket audio systems. There are three main types of auto amps: monaural, two-channel, and four-channel.
Monaural amplifiers are the simplest type of auto amp, and they are typically used to power subwoofers. Two-channel amplifiers are designed to power two speakers, and they are the most common type of auto amp. Four-channel amplifiers are designed to power four speakers, and they are typically used in high-end audio systems.
Auto amps are typically powered by the vehicle's battery, and they use the alternator to generate electricity. Most auto amps have built-in crossovers that allow them to filter out low-frequency sounds. Some auto amps also have built-in EQs that allow the user to adjust the sound quality.