Do you need a schem of the actual eq, or just how to hook up
in the FB loop of an op amp? I have the later around
somewhere, or you could probably get it from Spectra Sonics
Aviation in Ogden Utah. Last I checked though, they will not
give up actual schematics, which seems kinda silly to me.

John Noll wrote:
I'm looking for a schematic for a SpectraSonics 500 passive EQ.
It's the 4-knob, two band version with selectable frequencies.
Thanks.