This is quam ut amplificator est. This is a 4-transistor amplifier circuit diagram. This circuit diagram can make 300 watts using 60-0-60 voltage, 5 amperes. can use 25-0-25 voltage to 60-0-60 voltage. Any NPN and PNP transistors can be used in this circuit diagram. here use 2sc5200 and 2sa1943 transistor.  Details about 2SC5200  2sc5200 Polarity … Continue reading quam ut amplificator est