Used Electro-Harmonix Op-Amp Big Muff

🇺🇸Electro-Harmonix2018–presentAlso known as: Op-Amp Big Muff, Smashing Pumpkins Fuzz
For sale now:1896 listings
Price range:$63–$165
Most common:good

About the Electro-Harmonix Op-Amp Big Muff

The Electro-Harmonix Op-Amp Big Muff was introduced by Electro-Harmonix in 2018 and remains in production today. Electro-Harmonix has been building instruments in the United States since 1968. You may also see this listed as "Op-Amp Big Muff", "Smashing Pumpkins Fuzz" — they refer to the same instrument.

Buying Guide

  • 1Test the footswitch — it should click firmly and engage/bypass cleanly without pops or signal drops.
  • 2Check that all knobs turn smoothly through their full range. Scratchy pots are cheap to fix but indicate age or neglect.
  • 3If the pedal uses a battery, check the battery compartment for corrosion. If it uses a power supply, test with a standard 9V center-negative supply.

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