loudspeaker

loudspeaker
    n 1: electro-acoustic transducer that converts electrical
         signals into sounds loud enough to be heard at a distance
         [syn: {loudspeaker}, {speaker}, {speaker unit},
         {loudspeaker system}, {speaker system}]
    

loudspeaker \loud"speak*er\ n.
   A device which converts electrical signals into sounds loud
   enough to be heard at a distance, usually outdoors; it is
   used to amplify or transmit over a distance speech from a
   person, who is typically speaking into a microphone.
   Sometimes it is used to play recorded speech or music.

   Syn: speaker, speaker unit, loudspeaker system, speaker
        system.
        [WordNet 1.5]
    

30 Moby Thesaurus words for "loudspeaker":
      acoustical network, capacitor speaker, coaxial speaker, cone,
      crossover network, diaphragm, dynamic speaker, earphone,
      electrodynamic speaker, electromagnetic speaker,
      electrostatic speaker, excited-field speaker,
      full-fidelity speaker, headphone, headset, high-fidelity speaker,
      high-frequency speaker, horn, low-frequency speaker,
      midrange speaker, monorange speaker, moving-coil speaker,
      permanent magnet speaker, speaker, speaker system, speaker unit,
      triaxial speaker, tweeter, voice coil, woofer