The Electro-Harmonix Op-Amp Big Muff is an Electro-Harmonix fuzz pedal, currently around $86.18. Close alternatives include the Electro-Harmonix Big Muff PI- Made and the EarthQuaker Devices Hizumitas-Pba. It pairs well with the Laney RB3 Richter Bass Amp and the Mesa Boogie Mark I.
Electro-Harmonix Op-Amp Big Muff
Electro-Harmonix · pedal
The Electro-Harmonix Op-Amp Big Muff is the late-1970s IC-based version of the Big Muff, famous as the crushing, scooped wall-of-fuzz on Smashing Pumpkins' Siamese Dream. Unlike transistor Muffs it has a more aggressive, mid-scooped, slightly gated voice with massive sustain. It suits alternative rock, grunge and shoegaze players seeking thick, saturated, layered fuzz.
- big muff
- massive
- shoegaze
- sustain
- fuzz
- scooped
- mid
- mix
Price updated Aug 27, 2026
Genres the Electro-Harmonix Op-Amp Big Muff is commonly used in
- Shoegaze
- Alternative Rock
- Grunge
- Rock
- Stoner Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Noise Rock
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Electro-Harmonix Op-Amp Big Muff
Laney RB3 Richter Bass Amp
Laney
30% matchLaney RB3 Richter Bass Amp pushes a scooped tone toward mid-forward
Mesa Boogie Mark I
Mesa Boogie
29% matchFeed a scooped signal into Mesa Boogie Mark I and it comes out closer to mid-forward
Peavey 112-6 1x12
Peavey
tonal matchStack Peavey 112-6 1x12 on top and a scooped tone tightens toward mid-forward
Roland Cube Street EX
Roland
tonal matchFeed a scooped signal into Roland Cube Street EX and it comes out closer to mid-forward
Ceriatone HRM 50
Ceriatone
tonal matchCeriatone HRM 50 pushes a scooped tone toward mid-forward
Gallien-Krueger Legacy 212
Gallien Krueger
tonal matchGallien-Krueger Legacy 212 pushes a scooped tone toward mid-forward
Gibson Dual Falcon 20
Gibson
tonal matchGibson Dual Falcon 20 takes that scooped character and pushes it toward mid-forward
Gallien-Krueger MB-212 II Bass Combo 500 watts
Gallien Krueger
tonal matchGallien-Krueger MB-212 II Bass Combo 500 watts pushes a scooped tone toward mid-forward
Pedals that stack with the Electro-Harmonix Op-Amp Big Muff
Browne Amplification Gritador
Browne Amplification
27% matchBrowne Amplification Gritador takes that scooped character and pushes it toward mid-forward
Ashdown Triple Shot
Ashdown
27% matchThe Op-Amp Big Muff's massive, shoegaze-voiced sustain gives Triple Shot's bass drive somewhere heavier to land.
Maestro Orbit
Maestro
20% matchPut Maestro Orbit after Electro-Harmonix Op-Amp Big Muff in the signal chain, clear of Electro-Harmonix Op-Amp Big Muff's own gain stage
Pigtronix Philosopher's Tone Micro
Pigtronix
17% matchElectro-Harmonix Op-Amp Big Muff's sustaining character and Pigtronix Philosopher's Tone Micro's sustaining voice sit in the same lane rather than fighting each other
Catalinbread Epoch-Set
Catalinbread
11% matchKeep Catalinbread Epoch-Set after Electro-Harmonix Op-Amp Big Muff in the signal chain, clear of Electro-Harmonix Op-Amp Big Muff's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Universal Audio Golden Reverberator
Universal Audio
10% matchRun Universal Audio Golden Reverberator after Electro-Harmonix Op-Amp Big Muff in the signal chain, clear of Electro-Harmonix Op-Amp Big Muff's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
JHS Legends of Fuzz Supreme 1972 Japan Fuzz
JHS Pedals
tonal matchFeed a scooped signal into JHS Legends of Fuzz Supreme 1972 Japan Fuzz and it comes out closer to mid-forward
Fortin Amplification Fourteen Overdrive
Fortin Amplification
tonal matchStack Fortin Amplification Fourteen Overdrive on top and a scooped tone tightens toward mid-forward
Cheaper alternatives
Boutique & premium upgrades
JAM Pedals Red Muck
Jam Pedals
78% similarityShared character: big_muff, fuzz, mix
JHS Pedals JHS Muffuletta
JHS Pedals
77% similarityShared character: big_muff, fuzz, mix
Mojo Hand FX Colossus Fuzz
Mojo Hand Fx
76% similarityShared character: big_muff, fuzz, mix
Wren and Cuff Pickle Pie
Wren And Cuff
75% similarityShared character: big_muff, fuzz, mix
Fuzzrocious Grey Stache
Fuzzrocious
75% similarityShared character: big_muff, fuzz, mix
Wren and Cuff Super Russian
Wren And Cuff
96% similaritysimilar tone character
Similar charactersee all similar tone character →
Electro-Harmonix Big Muff PI- Made
Electro-Harmonix
77% similarityShared character: big_muff, fuzz, mix
EarthQuaker Devices Hizumitas-Pba
EarthQuaker Devices
75% similarityShared character: sustain, big_muff, fuzz
Electro-Harmonix Triangle Big Muff Pi
Electro-Harmonix
75% similarityShared character: 1960s, big_muff, mix
Walrus Audio Jupiter
Walrus Audio
75% similarityShared character: big_muff, fuzz, thickness
Russian Big Muff Pi
Russian Big Muff
75% similarityShared character: smashing_pumpkins, big_muff, fuzz
Electro-Harmonix Nano Big Muff Pi
Electro-Harmonix
74% similarityShared character: big_muff, fuzz, mix
See all alternatives to the Electro-Harmonix Op-Amp Big Muff (cheaper + boutique) →
Questions people ask
What are good alternatives to the Electro-Harmonix Op-Amp Big Muff?+
The closest matches in character are the Electro-Harmonix Big Muff PI- Made, the EarthQuaker Devices Hizumitas-Pba, the Electro-Harmonix Triangle Big Muff Pi. Budget picks: Mooer Triangle, Mooer MFZ2 Triangle Buff, Tone City Bad Horse. Boutique upgrades: JAM Pedals Red Muck, JHS Pedals JHS Muffuletta, Mojo Hand FX Colossus Fuzz.
What pairs well with the Electro-Harmonix Op-Amp Big Muff?+
Strong matches from rig and tone-complementarity evidence: Laney RB3 Richter Bass Amp, Mesa Boogie Mark I, Peavey 112-6 1x12 — Laney RB3 Richter Bass Amp pushes a scooped tone toward mid-forward.
How much does the Electro-Harmonix Op-Amp Big Muff cost?+
Around $86.18 (live listing price, updated Aug 27, 2026).
Compare
- vs Wren and Cuff Super Russian
- vs JAM Pedals Red Muck Mk.2 Fuzz/Distortion
- vs Way Huge Smalls Swollen Pickle Fuzz