The Headphone audio amplifier based two Transistors circuit is very simple and easy to construct, the main component is built with only two transistors 2N3565 and 2N3706.
Headphone Audio Amplifier Power supply can use a 9V battery. Output Headphone Amplifier can be connected with a 32 or 64 ohm headphones.
Parts list : R1 : 100K R2 : 47 ohm R3 : 4,7K C1 :0.47uF C2, C3 : 470uF VR1 : 50K Transistor : 2N3565 and 2N3706
