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 ...

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 ...