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by kazinator 26 days ago
I spotted a fixed equalizer in the middle of a guitar power amp schematic (Randall G3 series), so I banged it up in LTSpice for a simulation:

https://www.ssguitar.com/index.php?topic=5751.msg45172

I came up with a nice schematic layout whereby we have the gyrators in a column on the right and then the mixer resistors which plug them into the fixed equalizer to the right, making it easier to follow.