Class-AB Headphone Amplifier Circuit

This is the circuit diagram of Class-AB headphone amplifier which built using 3 transistors of BC549 and BC559. The circuit is very simple and will give you good audio performance.

The power consumption of this headphone amplifier circuit is claimed to be very low. Two pieces of AA battery will supply the circuit for long time.

Components List:

R1 - 100K R2 - 330 R3 - 100 R4 - 22 (2 - 4.5V) R4 - 100 (5 - 12V) C1 - 4.7uF

C2 - 4.7uFC3 - 100 - 1000uF C4 - 220uF P1 - 100K D1, D2 - 1N4148 Q1, Q2 - BC549 Q3 - BC559

Specifications:
Power Supply Voltage: 2 - 12V
Power Consumption: 10mA/3V - 30mA/12V (measurements taken using a stereo version)
Output Power: 300mW

The circuit can be used for common electronic devices such as radios, CD/DVD Players, computers, audio/video players, ipods etc.

Circuit Source: Class-AB Headphone Amplifier Circuit