Proto Pedal Example: Analog Equalizer Project - SparkFun Learn
MXR - 6 and 10 band Equalizer - freestompboxes.org
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Experimentalists Anonymous DIY Archives
Build own EQ pedal???
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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
Mr. EQ
Image result for passive 3 band eq wiring | Diy guitar pedal, Diy guitar amp, Guitar pedals
Passive 3 band EQ
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Proto Pedal Example: Analog Equalizer Project - SparkFun Learn