3 Band Equalizer

Posted in Tone control, on 2015-07-27


A tone control circuit made with a single op-amp and having three ranges, bass, middle and treble controls.

3 Band Equalizer


Using a single op-amp this easy to make equalizer offers three ranges, low frequency,mid frequency,and high. With component values shown there is approximately +/-20dB of boost or cut at frequencies of 50Hz, 1kHz and 10kHz. Supply voltage may be anything from 6 to 30 Volts. Maximum boost 20dB is only realized with maximum supply voltage of 18 Volt. 

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Source , Author: Andy Collinson