"PA system." YourDictionary, n.d. Web. 13 October 2018. <http://www.yourdictionary.com/pa-system>.
PA system. (n.d.). Retrieved October 13th, 2018, from http://www.yourdictionary.com/pa-system
(plural PA systems)
(Public Address system) A sound amplification system comprising a microphone, amplifier and speakers. Primarily used for speech, PA systems are widely used in schools, auditoriums and sports arenas.
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