IC AP500A used to promote the class, at the end of a Hitachi-Featured K1058/J162 as supervisor. Figure in the K1, K2 for the button-switch, K1 can be L, R-channel input signal swap; K2 is used shutdown disconnect the load and avoid impact. Circuit correctly installed, just for 4.7 k Ω potential allows the end-amp quiescent current of 300 mA to.
