---
product_id: 55493759
title: "Op Amp Big Muff Pi Fuzz Pedal | Faithful re-creation of the original late-70s Op-Amp Big Muff Pi!"
brand: "electro-harmonix"
price: "€ 197.42"
currency: EUR
in_stock: true
reviews_count: 13
category: "Electro Harmonix"
url: https://www.desertcart.hr/products/55493759-op-amp-big-muff-pi-fuzz-pedal-faithful-re-creation
store_origin: HR
region: Croatia
---

# Iconic 90s fuzz tone 9V battery or adapter powered True bypass for pure signal Op Amp Big Muff Pi Fuzz Pedal | Faithful re-creation of the original late-70s Op-Amp Big Muff Pi!

**Brand:** electro-harmonix
**Price:** € 197.42
**Availability:** ✅ In Stock

## Summary

> 🎛️ Unlock the fuzz that shaped a generation—don’t just play, make history!

## Quick Answers

- **What is this?** Op Amp Big Muff Pi Fuzz Pedal | Faithful re-creation of the original late-70s Op-Amp Big Muff Pi! by electro-harmonix
- **How much does it cost?** € 197.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/55493759-op-amp-big-muff-pi-fuzz-pedal-faithful-re-creation)

## Best For

- electro-harmonix enthusiasts

## Why This Product

- Trusted electro-harmonix brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pure Signal Integrity:** True bypass switching ensures your clean tone stays pristine when the pedal is off—no signal loss, no compromises.
- • **Plug & Play Versatility:** Runs on a 9V battery or optional AC adapter, so you’re ready to jam anywhere, anytime.
- • **Rugged & Compact Design:** Die-cast metal housing built to withstand the rigors of touring while fitting seamlessly on any pedalboard.
- • **Precision Tone Sculpting:** Tone, Sustain, and Volume controls plus a Tone Bypass switch let you dial in your signature fuzz with surgical accuracy.
- • **Legendary 90s Sound Revival:** Recreate the thick, gritty fuzz that defined Smashing Pumpkins’ Siamese Dream and 90s alt-rock anthems.

## Overview

The Electro-Harmonix Op Amp Big Muff Pi fuzz pedal delivers the iconic, thick fuzz tone popularized in the 90s, notably on Smashing Pumpkins’ Siamese Dream album. Featuring true bypass switching, precise Tone, Sustain, and Volume controls, plus a rugged die-cast chassis, this pedal offers professional-grade sound sculpting in a compact, pedalboard-friendly package. Powered by a 9V battery or optional adapter, it’s a must-have for guitarists craving vintage fuzz with modern reliability.

## Description

Original OP-Amp Big Muffs from the late 70s, also called IC- or V4-Big Muff, hit the highest prices. That's why at EHX, we decided to put this classic pedal back at an affordable price. Smashing Pumpkins guitarist Billy Corgan, used the old OP-Amp Big Muff amp on the 1993 album Siamese Dream. Now he says, "The magic is still there. What I'm looking for! The OP-Amp Big Muff amp uses surgical amplifiers instead of transistors and three gain levels instead of the usual four. Powerful sound with crisp crunch and ideal for sound distortion as you need for bold rhythm work and rich leads. Tone, sustain and volume controller, plus True Bypass Switching tone bypass switch, can be used with 9V battery or optional EHX9.6DC-200 AC adapter. Dimensions: 70 x 115 x 54 mm

Review: FUZZY MUFF - You want all the fuzzy goodness? Get this pedal. Tone is girthy and everything you want. Do it.
Review: “THAT SOUND”-90s FUZZ - As most of you who are thinking about buying this pedal already know, this is the pedal that was said to be used on the Smashing Pumpkins “Siamese Dream” album. It has that iconic, thick 90s fuzz tone that not only sounds like “Siamese Dream” but can also be tweaked to sound like most 90s bands that used fuzz like Bush, Collective Soul etc. It is also worth mentioning that the price is fairly cheap for a pedal of this caliber. It is heavy in weight so you know it is not cheaply made. Now I know that most of you notice that the price on desertcart is higher than most other music gear sites. While that is true, most of the other sites(at the time of this review) don’t have this pedal in stock and after paying shipping/taxes, you may end up paying 5-10 dollars(or the same amount)more on desertcart but they have it in stock and you get the pedal in a couple of days. I’m not recommending one or the other but do the cost benefit analysis for yourself. Lastly, if you hook up this pedal and immediately start playing “Cherub Rock” you will notice the tone sounds basically identical but something is off....what is it?!? According to my basic research, the band actually layered multiple guitar tracks in order to achieve the exact sound on the album. So what I’m saying is don’t get discouraged if your riff doesn’t sound JUST like the album because it is impossible unless you layer multiple guitar tracks. But this pedal gets you 95% the way there and that’s good enough for me.

## Features

- Iconic sound and vibe that’s coveted by guitarists
- Controls for Tone, Sustain and Volume, plus a Tone Bypass switch
- True bypass switching for maximum signal integrity in bypass mode
- Rugged, compact, die-cast package… pedalboard friendly

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B078HDPH3F |
| Amperage | 5 Milliamps |
| Audio Output Effects | Fuzz/Distortion |
| Best Sellers Rank | #4,173 in Musical Instruments ( See Top 100 in Musical Instruments ) #15 in Guitar Distortion & Overdrive Effects #975 in Guitar & Bass Accessories |
| Brand | Electro-Harmonix |
| Brand Name | Electro-Harmonix |
| Color | Multicolored |
| Connector Type | 1_4_inch_audio |
| Controls Type | Touch |
| Customer Reviews | 4.8 out of 5 stars 387 Reviews |
| Global Trade Identification Number | 00683274012087 |
| Hardware Interface | 1/4-inch Audio |
| Included Components | 9V battery |
| Item Dimensions | 4.5 x 2.75 x 2.1 inches |
| Item Dimensions L x W x H | 4.5"L x 2.75"W x 2.1"H |
| Item Type Name | Effect Pedal |
| Item Weight | 0.31 Kilograms |
| Manufacturer | Electro Harmonix |
| Manufacturer Part Number | 109 |
| Model Name | Op-Amp Big Muff Pi |
| Model Number | OPAMPBM |
| Power Source | Battery Powered |
| Product Dimensions | 4.5"L x 2.75"W x 2.1"H |
| Signal Format | Analog |
| Style | Fuzz |
| UPC | 683274012087 |
| Voltage | 9 Volts |
| Warranty Description | Electro-harmonix will repair your product if it fails to operate due to defects in materials or workmanship for a period of one year from date of purchase. In the event that it should ever become necessary to return your unit to the factory for repair, please ship the unit to us, securely packed, postage prepaid and insured, along with a copy of proof of purchase and with the appropriate handling … |

## Product Details

- **Brand:** Electro-Harmonix
- **Style:** Fuzz
- **Color:** Multicolored
- **Product Dimensions:** 4.5"L x 2.75"W x 2.1"H
- **Item Weight:** 295 Grams

## Images

![Op Amp Big Muff Pi Fuzz Pedal | Faithful re-creation of the original late-70s Op-Amp Big Muff Pi! - Image 1](https://m.media-amazon.com/images/I/71jVE9p2a5L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ FUZZY MUFF
*by J***S on May 4, 2026*

You want all the fuzzy goodness? Get this pedal. Tone is girthy and everything you want. Do it.

### ⭐⭐⭐⭐⭐ “THAT SOUND”-90s FUZZ
*by P***K on October 24, 2020*

As most of you who are thinking about buying this pedal already know, this is the pedal that was said to be used on the Smashing Pumpkins “Siamese Dream” album. It has that iconic, thick 90s fuzz tone that not only sounds like “Siamese Dream” but can also be tweaked to sound like most 90s bands that used fuzz like Bush, Collective Soul etc. It is also worth mentioning that the price is fairly cheap for a pedal of this caliber. It is heavy in weight so you know it is not cheaply made. Now I know that most of you notice that the price on Amazon is higher than most other music gear sites. While that is true, most of the other sites(at the time of this review) don’t have this pedal in stock and after paying shipping/taxes, you may end up paying 5-10 dollars(or the same amount)more on Amazon but they have it in stock and you get the pedal in a couple of days. I’m not recommending one or the other but do the cost benefit analysis for yourself. Lastly, if you hook up this pedal and immediately start playing “Cherub Rock” you will notice the tone sounds basically identical but something is off....what is it?!? According to my basic research, the band actually layered multiple guitar tracks in order to achieve the exact sound on the album. So what I’m saying is don’t get discouraged if your riff doesn’t sound JUST like the album because it is impossible unless you layer multiple guitar tracks. But this pedal gets you 95% the way there and that’s good enough for me.

### ⭐⭐⭐⭐⭐ A must have pedal for sludge rock
*by B***A on September 26, 2025*

Impeccable tone paired through an entry level modeling amp (blackstar IDcoreV4). Awesome for stoner/sludge rock. Great build quality and design. I recommend lowering the gain and maxing the volume on your amp, then using the pedal's volume knob as the de-facto volume control; this is how I was able to get the best tone.

## Frequently Bought Together

- Electro-Harmonix Op Amp Big Muff Pi Fuzz Pedal
- MXR Patch Cable 6 in|15 cm - 3 Pack (3PDCP06)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-09-12*