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With original late-70s Op-Amp Big Muffs selling for exorbitant prices, Mike Matthews decided to take the power to the people and reissue the classic pedal at a price that players could afford! The circuitry of the new Op-Amp Big Muff —sometimes also referred to as the IC or V4 Big Muff— has been faithfully re-created while several practical enhancements have been added including a compact, die-cast chassis and true bypass switching.

"The Op-Amp Big Muff was popularised by the brilliant Billy Corgan who first used it on the Smashing Pumpkins' epic 1993 album Siamese Dream. After he was videotaped playing and talking about the reissue, Billy stated: ‘The magic’s still in the box, I can still get what I' looking for!'" - Mike Matthews

The pedal relies on op-amps rather than transistors and three gain stages rather than four, to create its signature sound. It's a sound that’s been described by noted Big Muff collector and historian, Kit Rae, as: "a huge, crushing Big Muff sound with more crunch… great for grungy, wall-of-sound distortion, heavy rhythm playing and heavy leads."

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Customer reviews

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  • Sean Bennett

    27/9/2020

    Awsome Smashing Pumpkins tones and beyond!! Thank you so much GAK I’m planning on a 30 Electro Harmonix collection or so but not too many!! So I want to get a Triangle Big Muff and other different ones. I pray on us all please stay safe and take care. 10/10 service and 5 star reviews I always give GAK God bless us all!!

  • David Lelliott

    18/9/2020

    Great pedal. Unbelievably heavy. Love it.

  • Mr N Tupman

    18/8/2020

    Does what it says on the tin, this thing does the Siamese Dream tone really well.

  • Rae

    08/7/2020

    Very aggressive fuzz. Was looking up different big muffs and this model seemed right up my alley and when I first used it I was blown away by how powerful this pedal sounds.

  • Jack

    23/4/2020

    The definitive Big Muff Sound I was looking for

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