Application of SHM1120

It is a two-channel power amplifier circuit using NE5532 as preamplifier
and equipped with a tone control circuit
. Icl, I island, etc. constitute the left and right channel preamplification and negative feedback high, mid and bass control circuits; IC3 and IC4
constitute the power output circuit: VTi.VTz: constitute the speaker protection circuit , which can provide 3 seconds The left and right delay
time eliminates the "pop" sound of the speaker at the moment of power-on, and can cut off the speaker
in time when the midpoint DC potential of the left and right audio output terminals drifts to protect it. The     power supply of this machine can be used as a bridge. In order to eliminate the influence of the parasitic inductance of the capacitor, it is a common power supply with type rectification and capacitor filtering . It is best to use multiple groups of capacitors in parallel to cross the network.