The above is a stereo amplifier circuit based on IC STK4191 with 2 X 50Watt output power 8 ohm impedance. And besides that you can use some of the IC can also be applied in this series include the STK4101, 4111, 4121, 5131, 4141, 4151, 5161, 4171, 4181, and 4191. Required supply voltage from 12 Volt to 35 Volt DC. Part List : R1 = 22K R2 = 22K R3 = 560R R4 = 56K R5 = 1K R6 = 1K R7 = 100R R8 = 2K R9 = 2K R10 = 4.7R R11 = 2K2 R12 = 2K2 R13 = 4.7R R14 = 100R R15 = 56K R16 = 560R C1 = 0.1uF C2 = 0.1uF C3 = 100uF C4 = 100uF C5 = 100uF C6 = 0.1uF C7 = 47uF C8 = 47uF C9 = 0.1uF C10 = 100uF C11 = 100uF U1 = STK4191