Vintage Russian 4-bands equalizer - full project

[abbey road d enfer]

My link above contains a schematic for a parametric graphic equalizer, using OP-amps,

 

[MidnightArrakis]

https://sound-au.com/articles/gyrator-filters.htm

Interesting stuff in this article!!!

https://sound-au.com/articles/gyrator-filters.htm

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[Ricardus]

This is an interesting project. I will be following this space.