Definitions for "Audio amplifier"
A circuit with one or more stages designed to amplify the audio frequency range (about 20 to 20,000 Hz).
an amplifier that increases the amplitude of reproduced sound
a transducer, not a voltage amplifier device
Keywords:  plain, simple, modulated, supply, power
a modulated power supply plain and simple
Keywords:  voltage, output, device
a voltage-output device