#loudspeaker_system__loudspeakersystem__loudspeaker__speaker__speaker_unit__speakerunit__speaker_system__speakersystem  electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
  supertype:  electro-acoustic_transducer  a transducer that converts electrical to acoustic energy or vice versa
  part of:  public_address_system
  subtype:  bullhorn__loud-hailer  a portable loudspeaker with built-in microphone and amplifier
  subtype:  squawk_box__squawker__intercom_speaker  the loudspeaker on an inter-com or public address system
  subtype:  tannoy  (British) a loudspeaker
  subtype:  tweeter  a loudspeaker that reproduces higher audio frequency sounds; "the sound system had both tweeters and woofers"
  subtype:  woofer  a loudspeaker that reproduces lower audio frequency sounds

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