30W GUITAR AMPLIFIER ELECTRONIC DIAGRAM

30W GUITAR AMPLIFIER ELECTRONIC DIAGRAM

This is design of 30W Guitar Amplifier ELECTRONIC DIAGRAM

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Class AB Power Amplifier Circuit 30w Using Power Transistor

Class AB Power Amplifier Circuit Diagram

30W Class AB power amplifier schema diagram using power transistor. Set the above amplifier up by adjust the variable resistor R1 to maximum and R12 to zero. After this set up is done, the activate / turn on the amplifier. Adjust the R1 so that the measured output offset is between 30 and 100mV. Once set, adjust the R12 slowly to achieve a quiescent current of around 120mA. Keep checking the quiescent current as the amplifier heats up as it might change due to voltage drop changes in the output devices because of the heat. The heatsinks should be 0.6K/W or less for two amplifiers.

Power supply schema for 30W class AB power amplifier:

30W Class AB Power Amplifier Circuit, 

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Subwoofer amplifier with 30W output power

Amplifier circuit is very suitable for use in subwoofer amplifier system based on IC SI1030G. Amplfier has 30W output with 8 ohm impedance. Supply voltage required minimum of 12 volts and a maximum of up to 22 volts DC.

Component List :

R1 = 100K

R2 = 1R

C1 = 2.2uF

C2 = 100uF
C3 = 47uF
C4 = 100nF
C5 = 10uF
C6 = 47uF
C7 = 100uF
IC = SI1020GL , SI1030G

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