Verifact® AGC microphone comes with a built-in preamplifier producing line level audio output. This microphone has the added feature of Automatic Gain Control which  provides controlled signal amplitude at the output, despite variation of the amplitude in the input signal. As a result, the Verifact® AGC can automatically regulate the volume of the signal, reducing the decibel levels if the signal is strong and raising them if the signal is weak. This eliminates overdriving, popping and clipping and results in improved audio quality.