Pleiades Filter schematic

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          Pleiades filter schematic


A similar filter can be used after this with a capacitor in series with a resistor for high cut or low pass.


So many curves of any slope can be made on either side of the spectrum.


If variable or many L or C are used it will be a parametric EQ.


By adding a variable resistor in series with the source of signal a parametric filter may be possible by using just one inductor.