TBA820M high gain audio amplifier circuit design

Using TBA820M audio amplifier integrated circuit can be designed a very simple audio amplifier circuit using few electronic parts. This audio amplifier electronic project has a very high gain as can be hear under water sounds .
The TBA820M is a monolithic integrated audio amplifier in a 8 lead dual in-line plastic package. It is intended for use as low frequency class B power amplifier with wide range of supply voltage: 3 to 16V, in portable radios, cassette recorders and players etc.
To listening the output signal we must use an 8 ohms impedance speaker.
This audio amplifier must powered from an 9 volts DC power supply.

Circuit Diagram:

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