Car Subwoofer Amplifier with STK IC

This is a commonly used audio power amplifier can be used as car subwoofer amplifier since this circuit uses asymmetrical power supply to work. 24V lead acid battery (car accumulator) should be great for this subwoofer amplifier.

Subwoofer amplifier circuit STK

Simple design, low cost and easy to build are the advantages of this amplifier circuit which capable to deliver about 20W power audio output, or course it’s enough for the “room” of cars. Take a note that heatsink is required to prevent over heating.

Components List:

R1 = 100K
R2 = 47R
R3 = 100R
R4 = 1R
C1 = 220uF
C2 = 100uF
C3 = 100uF
C5 = 10uF
C6 = 1uF
C7 = 1uF
C8 = 1000uF
C9 = 0.1uF
IC = STK011 , STK015 , STK016

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