The circuit illustrates the use of 3 frequencies to produce a graphic equalizer that will be used for acoustic signals. Equalizer – a passive or an active electronic element or circuits (like tone ...

There was a time when any hi-fi worth its salt had a little row of sliders on its front panel, a graphic equalizer. On a hi-fi these arrays of variable gain notch filters were little more than a fancy ...

The main component of this 3 band graphic equalizer is LM833 produced by National Semiconductor. LM833 has a very low noise, and a band / amplifier of 15MHz and a rise speed of 7V/s. The cut points ...