This 3 band equalizer circuit is an active filter network for bass, mid and high audio ranges. It is designed around the LM833 opamp from National Semiconductors. This opamp IC has the following ...

The cut points for low frequencies are 200 Hz and 2 Khz for high frequencies. Maximum attenuation is 16 dB. The total gain of this sound equalizer is 0 dB but can be changed by changing R2. You may ...