Simple Headphone Amplifier Circuit Diagram. As it seen from the diagram two identical circuitry is drawn for left and right which are mainly based on bc549c transistors. Here are the full schematics of a simple audio amplifier.

Figure 1 is a complete class a headphone amplifier circuit. The headphone amplifier provides a maximum output of 1 watt to an 8 ohm load by an input level of 500 mv. Make a simple audio amplifier.

The 4 right lower rca phono jacks are inputs and testing outputs.

So you will find extra humming noise in the amplifier. First the audio signal comes to the input through j1 and c1. It is my first instructable lets see how to make an audio amplifier which you can use with any of your musical instruments like guitar piano and with ipod and other devices so lets begin the journey. The headphone amplifier provides a maximum output of 1 watt to an 8 ohm load by an input level of 500 mv.