CRTC Electronics
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Amp
Gain
Then the gain of an amplifier can be said to be the relationship that exists between the signal measured at the output with the signal measured at the input.
Class
- Class A - has low efficiency of less than 40% but good signal reproduction and linearity.
- Class B - is twice as efficient as class A amplifiers with a maximum theoretical efficiency of about 70% because the amplifying device only conducts (and uses power) for half of the input signal.
- Class AB - has an efficiency rating between that of Class A and Class B but poorer signal reproduction than class A amplifiers.
- Class C - is the most efficient amplifier class as only a very small portion of the input signal is amplified therefore the output signal bears very little resemblance to the input signal. Class C amplifiers have the worst signal reproduction.