Image result for passive 3 band eq wiring | Pedais de guitarra, Amplificador de áudio, Captador guitarra
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
SMALL FI BASS CUT LO FIDELITY EFFECT PEDAL PASSIVE EQ HIGH PASS FILTER LOW | eBay
Wampler EQuator Equalizer – Thomann United States
The Complete Guide To Passive Equalization/EQ – My New Microphone
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