A sound reinforcement system is an arrangement of
microphones, electronic
signal processors,
amplifiers, and
loudspeakers that makes live or pre-recorded sounds—usually music or speech— louder, or which distributes the sound to a larger or more distant audience. A sound reinforcement system may be very complex, including hundreds of microphones, complex mixing and
signal processing systems, tens of thousands of
watts of amplification, and multiple loudspeaker arrays, all overseen by a team of audio engineers and technicians. On the other hand, a sound reinforcement system can be as simple as a small
PA system in a
coffeehouse, consisting of a single microphone connected to a self-powered 100-watt loudspeaker system. In both cases, these systems reinforce sound to make it louder or distribute it to a wider audience.
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