Noun
an amplifier that increases the amplitude of reproduced sound
Source: WordNetFor example, an audio amplifier with a gain given as 20 dB will have a voltage gain of ten (but a power gain of 100 would only occur in the event the input and output impedances were identical). Source: Internet
It used 6 triodes: a mixer, local oscillator, two IF and two audio amplifier stages, with an IF of 45 kHz. Source: Internet
The commemorative model transmitter was a thin mirror cemented to a short aluminum speaking tube, and its receiver was a silicon solar cell and audio amplifier, both installed in a lantern light housing. Source: Internet
Amplifier circuit A practical amplifier circuit The practical amplifier circuit to the right could be the basis for a moderate-power audio amplifier. Source: Internet
The demodulator extracts the audio or other modulation from the IF radio frequency; the extracted signal is then amplified by the audio amplifier. Source: Internet
This signal was fed into an audio amplifier, and played back by a loudspeaker. Source: Internet