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Simple Home Stereo Amplifier Circuit Diagram


This sis the Simple Home Stereo Amplifier Circuit Diagram. This home stereo amplifier circuit using STK4241V.  This home stereo amp is equiped with STK4241V wich is a thick film hybrid IC, AF Power Amplifier (Split Power Supply) (120W+120W min, THD = 0.08%).

Some features of STK4241V
  • Muting circuit built-in to isolate all types of shock noise.
  • Current mirror circuit for low 0.08% total harmonic distortion

Simple Home Stereo Amplifier Circuit Diagram


Simple Home Stereo Amplifier Circuit Diagram


For this 2×120W home stereo power audio amplifier we use a single monochip STK4241V to obtain up to 120W for each channel.

Printed Circuit Board (PCB) of Home Stereo Amplifier  STK4241V

Printed Circuit Board (PCB)


STK4241V Stereo Amplifier Parts List

R6, R22 – 560 ohm / 0.125W
R1, R24 – 1K / 0.125W
R9, R10 – 1K / 0.5W
R7, R18 – 4.7K / 0.25W
R8, R19 – 4.7K / 0.5K
R2, R5, R21, R23 – 56K / 0.125W
C7, C17 – 3pF ceramic
C2, C20 – 470pF ceramic 50V
C6, C16 – 1nF 100V
C11, C12 – 100nF 100V
C1, C19 – 2.2uF 50V
C5, C15 – 1uF 63V
C4, C10, C13 – 10uF 63V
C9, C14 – 47uF 63V
C8, C18 – 100uF 16V


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