Amplifier circuit is very suitable for use in car audio speakers that use a subwoofer, with a power output of about 60W and impedance of 4 Ohm. Supply voltage ranging from 12V to 35 volts with currents +, -, and ground. If using battery then use 12V DC to DC converter which produces 3 voltage +, -, and ground.
Component List :
Resistor
R1 = 10K
R2 = 4K7
R3 = 10R
R4 = 2.2R
R5 = 10R
R6 = 10K
R7 = 680R
R8 = 300R
Capacitor
C1 = 1uF
C3 = 10uFC4 = 10uF
C5 = 470uF
C6 = 0.1uFC7 = 100uF
C8 = 120pF
C9 = 270pF
C10 = 47uF
IC = OM931 , OM961