9 20 Volt amplifier circuit

For this time I will post the scheme following an amplifier of the IC KA2203, SN16975, TBA820, UL1482P. Which has 4 Watt power output with 4 Ohm impedance. At least 8 Volt supply voltage and a maximum of 20 volts.

Part List

R1 = 100K

R2 = 56R 

R3 = 56R

Use 1/2 W resistor

C1 = 47uF

C2 = 100uF
C3 = 100uF
C4 = 470uF
C5 = 470pF
C6 = 0.22uF
C7 = 100uF
U1 = KA2203 , SN16975, TBA820, UL1482P