Power Amplifier circuit with IC TDA1904

This circuit is circuit use the IC TDA1904 and IC TDA1905.
See schmatic below :

Technical instruction :
Minimum supply voltage   : 4 volts
Maximum supply voltage : 20 volts
Minimum currents             : 40 mA
Input can with                    : CD , Tuner , Tape , Preamp Mic , Media Player device.
Maximum Power Output   : 10Watts
Minimum Power Output   : 4 Watts
Impedance Speakers    : 4 Ohms

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