#reproducer  an audio system that can reproduce and amplify signals to produce sound
  supertype:  audio_system__audiosystem__sound_system__soundsystem  a system of electronic equipment for recording or reproducing sound
  subtype:  hi-fi__high_fidelity_sound_system  equipment for the reproduction of sound with high fidelity
  subtype:  stereo_system__stereo__stereophonic_system  reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound
     subtype:  ghetto_blaster  (informal) a portable stereo
     subtype:  quadraphony__quadraphonic_system__quadriphonic_system  a stereophonic sound recording or reproducing system system using four separate channels

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