Simulating the Boss GE-7 Graphic Equalizer in LTSpice
Building the Most Versatile DIY Distortion Pedal. (EQ Distortion Stack.) - YouTube
Schematics – electric-safari
Guitar/Bass Graphic EQ
Boss GE-7B Bass Equalizer guitar pedal schematic diagram
Active Tilt Equalizer - PARASIT STUDIO
Passive 3 band EQ
Guitar Pedal X - GPX Blog - A Brief Hobbyist Primer on Key Tone Stack Types and Circuit EQ Configurations - in collaboration with Master-Builder Adrian 'Thorpy' Thorpe
Proto Pedal Example: Analog Equalizer Project - SparkFun Learn
Rock Bottom EQ
Simple guitar 5 band EQ using the BA3812L chip nexp.pt