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  • Hi-Fi Power Amplifier

  • Created: Sep 17, 2014

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Summary

Hi-fi (High fidelity) is a term used by stereo listeners and audio enthusiast to refer to high-quality reproduction of sound. It is an equipment ideally has minimal amounts of noise and distortion and an accurate frequency response.

This project uses the MC1741 op-amp configured together with the transistors to amplify the input signal (sound) and Darlington transistors for push-pull high gain output stage.

Before the operation, the circuit must be “turned first;” short circuit the inputs of the op-amp and put a mA-meter on the output, then turn the amplifier on and tune the 10kΩ variable resistor to decrease the DC current on the output producing some uA’s (micro amperes) or if possible to zero.

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