3 Band Equalizer
Circuit :   Andy Collinson
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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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