100watt sub woofer amplifier circuit

Description

This is the circuit diagram of fully transistorized sub woofer amplifier that can produce  an output of

100w .There are seven transistors including four in the output stage. Transistors Q1 and Q2 form the

pre-amplifier stage. Transistors Q4 and Q7 from the output stage.Since no ICs are used the circuit is very 

robust and can be easily assembled on a general purpose PCB.  

Notes

• The circuit can be powered from +35v /-35, 5A dual power supply.
• Use 100W ,12 inch sub woofer at output.
• All electrolytic capacitors must be rated 100V.
• Transistors Q4 and Q7 must be fitted with heat sinks.