An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones. Audio power amplifiers are found in all manner of sound systems, including sound reinforcement, public address, home audio systems and musical instrument amplifiers like guitar amplifiers.
An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones. Audio power amplifiers are found in all manner of sound systems, including sound reinforcement, public address, home audio systems and musical instrument amplifiers like guitar amplifiers.
Source: Wikipedia "Audio power amplifier" · CC BY-SA 4.0
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