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- DictionaryPub·lic ad·dress sys·tem/ˌpəblik əˈdres ˌsistəm/
noun
- 1. a system of microphones, amplifiers, and loudspeakers used to amplify speech or music in a large building or at an outdoor gathering.
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noun
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A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music. PA systems are used in any public venue that requires that an announcer, performer, etc. be sufficiently audible at a dista... Wikipedia