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Wednesday, July 1, 2009

Simple 3 Band Equalizer Circuit

This is a simple design schematic for equalizer. The principle of the circuit is using a tone control. There are three ranges, basses, middle and treble in single op-amp that can be control. This is a figure of the circuit.


This circuit is using a single op-amp this easy to make equalizer offers three ranges, low frequency, mid frequency, and high frequency. The op-amp is based on LF351 IC 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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