Preamplifier

Preamplifier is a type of electronic amplifier. It doesn't have enough power to feed speakers. Rather a preamplifier amplifies weak signals, for example from a microphone, for electronic processing or distribution.

Early preamplifiers used vacuum tubes. Since the 1960s, most electronic amplifiers have been built with transistors. Transistors are lighter, less expensive, and more reliable.

Wikimedia Commons has media related to Audio preamplifiers.

• Amplifier

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