Detail 01
Op-amps and three gain stages
The pedal uses the Op-Amp Big Muff circuit approach rather than transistors, with three gain stages.
Product detailSKU #1500000189965
Electro-HarmonixOp-Amp Big Muff Pi Fuzz Guitar Effects Pedal -
aggressivehigh outputwarmmetalrockhard rock
Independent shopping perspective
The Korena take
Electro-Harmonix’s Op-Amp Big Muff Pi brings the late-’70s Op-Amp Big Muff circuit back in a compact die-cast pedal. Its design uses op-amps and three gain stages, distinguishing its circuit layout from transistor-based and four-stage approaches. True-bypass switching keeps bypass operation straightforward, while the 2.76 x 2.09 x 4.49-inch enclosure gives players a clearly defined footprint when arranging a pedalboard.
Strong match
Who this is for
- Guitarists building a compact board around the reissued Op-Amp Big Muff circuit.
- Players who want true-bypass switching in a compact die-cast fuzz pedal.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
2.76 x 2.09 x 4.49 inches
Use these measurements to plan its pedalboard position.
Final check
Know before you order
- 01Allow for a 2.76 x 2.09 x 4.49-inch pedal footprint.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Is this a transistor-based Big Muff?
No. It uses op-amps rather than transistors.
02Does it use true bypass?
Yes, it has true-bypass switching.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsSize & weight
- Dimensions Wxhxd
- 2.76 inch x 2.09 inch x 4.49 inch
