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Electro-Harmonix Op Amp Big Muff Pi Overdrive Pedal

Electro-Harmonix Op Amp Big Muff Pi Overdrive Pedal

Stomp on the EHX Op Amp Big Muff Pi to induce a Siamese Dream of crunchy fuzz tones. This unique Muff features a tone bypass switch for unfiltered goodness.

Overall User Ratings (based on 3 ratings)
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Submitted April 10, 2018 by chad t in turlock, CA
"op amp wins!!"
Verified Customer zZounds has verified that this reviewer made a purchase from us.
a great little pedal loaded with a huge sound features: tone vol and sustain (gain) knobs plus a switch to bypass the tone stack and get a really gnarly sound quality: built like all EHX pedals, super stout switch feels nice sound: big and dirty. this pedal sounds beefier than my tone wicker big muff pi. the sound is dirty and kind of noisy but it responds to your playing. ease of use: only 3 knobs and a single switch, if you feel like you need more knobs to fiddle with try the JHS pumpkin patch modded pedal value:this pedal is pretty cheap but sounds great and is built like a tank the wow factor: yeah its there, it did what i expected out of the box, just cranked the sustain and went to town
Musical Background:
long time guitar player
Musical Style:
rock
5 of 5 people (100%) people found this review helpful. Did you?
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Submitted December 13, 2020 by Mark Garner in Metairie, LA
"It Smashes Pumpkins and Much More"
Verified Customer zZounds has verified that this reviewer made a purchase from us.
This pedal is a reissue of the Big Muff used by Billy Corgan on the fuzz drenched beast that was 'Siamese Dream'.This is an awesome fuzz that can absolutely roar. I find it much more responsive tone-wise with the toggle switch tone control turned on.It can be really bright so I keep the sustain (amount of fuzz) pretty high, between 1 & 4 o'clock with the tone around noon.I ran it through my Marshall Origin 20 head using two 4×12's and the sound was HUGE.I also have the Ram's Head Big Muff and generally the two are fairly similar but I personally prefer the Ram's Head with single coils - using my Fender Hendrix Monetrey Strat, and the Op Amp Muff with humbuckers; a Jackson loaded with the Duncan Hot Rod set.I find both pedals make the guitar tone control a bit ineffective - I turn it to 0 and let the pedal and amp do the work.If pushed, I'd choose the Op Amp over the Ram's Head.I sorta wonder how my EHX SYNTH 9 would sound through one of these. Hmmm...(When I started playing, 1979, EHX had a reputation for great sound but inconsistent quality. Those days are over. I have several EHX pedals and they're all top notch with no issues.)
Musical Background:
Former semi-pro now a stay-at-home jammer.
Musical Style:
Rock, rock and rock; just the good stuff. Beatles, Yardbirds, Pink Floyd, Deep Purple & Zep...
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Submitted September 13, 2018 by Jared M in Asheville, NC
"Sweet as Pumpkin Pie"
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I own an original 78 op amp, so I jumped at the chance to add this to the board, as I don't like lugging around my vintage muffs. It doesn't nail my 78 dead on, but whose to say my original sounds like it should? All in all, it comes close enough to the Siamese fuzz we know and love, takes up 1/3 the real estate of the original, features true bypass (the original does not), and costs half of what a boutique pedal does these days. Easy to use and dial in those thick tones. It seems to lack the low grit growl when you dial back the sustain, but I have another fuzz for that.
Musical Background:
20+ Years of Guitar
Musical Style:
Rock/ Metal
3 of 3 people (100%) people found this review helpful. Did you?
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