how to increase power of amplifier

how to increase the power of the amplifier:

This circuit can increase the power of the amplifier. we can add the transistor following this circuit diagram. two transistors can be 8 transistor amplifiers. this circuit needs a PNP and NPN transistor. here used 2sc5200 and 2sa1943 transistor.  Positive to positive. Negative to negative. base+ to base+. base- to base-. and audio to audio. 

Circuit Diagram

transistor diagram of 2sa1943 and 2sc5200

Build a Transformer or construct the transformer. Home Theater Circuit Diagram 5.1

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