+A **power amplifier** is an electronic circuit that significantly increases the power of an input [Signal](/wiki/signal). It transforms a low-power audio or radio frequency input into a higher-power output, typically to drive devices like [Loudspeakers](/wiki/loudspeaker) or radio transmitters. Its core function is to deliver substantial [Current](/wiki/current) or voltage gain to an electrical load.
+## See also
+- [Amplifier](/wiki/amplifier)
+- [Electronics](/wiki/electronics)
+- [Audio](/wiki/audio)
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