How to make easy amplifier?

How to make an easy amplifier:

This is an easy amplifier circuit diagram for learning people. we know the transistor makes small into big. also works as a switch. here we use one transistor to make a small sound into a big sound. this is an NPN transistor. C2073 transistor. here we can use 6 to 12 voltages. we can use a maximum of 30 voltage then we have to use a heatsink for the transistor. 

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

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