Audio Distortion Meter Circuit with Diagram

Posted on Feb 6, 2014

Here is a simple 1KHz audio distortion meter that can measure the Total Harmonic Distortion (THD) on any load at any out put power. Here you have the option to select 2, 4, 8 or 16 Ohm loads. The circuit works by filtering the 1 kHz fundamental signal using a notch filter comprising of L1, C2, C1, R1. With a little time and calculation you can get the c

Audio Distortion Meter Circuit with Diagram
Click here to download the full size of the above Circuit.

orrect THD of your amplifier in such a simple way. Feed the input of your amplifier a 1KHz signal from a signal generator. If you don`t have a signal generator make a 1 kHz Colpitts oscillator for the purpose.

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