Used in Jamo E8 Subwoofer. When signal is present (after the band-pass filter) then output signal from analog comparator is used to unmute the LM3886 and switch-on the LM3886 power supply. Analog key is used to quickly discharge C2 capacitor. Normally this capacitor is used to leave the power on even after the input signal is off(for around 10 minutes). Both input signal and AC power supply cycle is simulated (using the damping factor) to show how the output signals changes through the sequence.