Sanyo STK412-170 from the series production of NGOs and STK4048X amplifier circuit diagrams and PCB drawings but no definite information can be compatible within an integrated PCB drawings of different NGOs. for example STK412-170 datasheet file when I look... Electronics Projects, Amplifier Circuits STK4048X STK412-170 "audio amplifier circuits, ic amplifier, " Date 2019/08/03