A PA system {public address system} is an electronic sound amplification and distribution system with a microphone, amplifier and loudspeakers, The term “PA” is also used for audio systems which may additionally have a mixing console, amplifiers and loudspeakers suitable for music as well as speech, used to reinforce recorded music or a person giving a speech or distributing the sound throughout a venue or building.
Simple PA systems are often used in small venues such as school auditoriums, churches, and small bars for live music or performances
