Electro-Harmonix Op-Amp Big Muff Pi Fuzz Pedal – New
Pairs well with
Description
The Electro-Harmonix Op-Amp Big Muff Pi recreates the distinctive late-1970s V4 Big Muff circuit, delivering huge sustain, aggressive crunch and crushing wall-of-sound distortion.
Its op-amp design gives it a harder, more direct response than many transistor-based Big Muff versions, making it ideal for grunge, alternative rock, shoegaze and heavy rhythm guitar.
At A Glance
| Feature | Details |
|---|---|
| Brand | Electro-Harmonix |
| Model | Op-Amp Big Muff Pi |
| Type | Fuzz / Distortion / Sustainer |
| Condition | New |
| Circuit | Analogue Op-Amp |
| Controls | Volume, Tone, Sustain |
| Tone Bypass | Yes |
| Bypass | True Bypass |
| Current Draw | 5mA |
| Power | 9V Battery / Optional DC Adapter |
| Best For | Grunge, alternative, shoegaze and heavy rock |
Classic Op-Amp Big Muff Tone
Unlike many traditional Big Muff circuits, the Op-Amp version uses operational amplifiers and three gain stages for a more aggressive, crunchy response.
Volume controls output level, Tone adjusts the balance from deep bass to cutting treble, and Sustain controls distortion and note length.
The Tone Bypass switch removes the tone circuit for a broader, more direct full-range fuzz sound.
What's Included?
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Electro-Harmonix Op-Amp Big Muff Pi
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9V battery
External power adapter not included.
Technical Specifications
| Specification | Details |
|---|---|
| Circuit | Analogue |
| Audio | Mono |
| Controls | Volume, Tone, Sustain |
| Additional Switch | Tone Bypass |
| Bypass | True Bypass |
| Current Draw | 5mA |
| Power | 9V Battery or Compatible 9V DC Adapter |
| Dimensions | 4.5 x 2.75 x 2.1" |
FAQs
How is the Op-Amp Big Muff different from a standard Big Muff?
It uses op-amps rather than the transistor-based gain structure found in many other Big Muff versions, giving it a harder, crunchier and more aggressive character.
What does the Tone Bypass switch do?
It removes the Tone control from the circuit for a broader, more direct full-frequency fuzz sound.
Is it good for grunge and alternative rock?
Yes. Its aggressive attack, thick distortion and long sustain are especially well suited to grunge, alternative rock and shoegaze.
Does it have true bypass?
Yes.
Is a power supply included?
No. A 9V battery is included, but an external power adapter is sold separately.
Why Buy From Fair Deal Music?
When you buy from Fair Deal Music, you're choosing one of the UK's most established, independent family run music retailers since 1987.
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Expert advice from knowledgeable musicians
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Secure UK-wide delivery
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Flexible finance options, subject to status
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Friendly support before and after purchase
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Birmingham showroom at 79–83 Holloway Head
Trade In. Trade Up. Save More.
Fair Deal Music accepts part exchanges on guitars, basses, amplifiers, effects pedals and other musical equipment. Contact our team for a no-obligation valuation.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
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Good to Know
How long is the warranty period?
For new products, you will get the full manufacturer warranty. For our second-hand products, we will cover any fault within 4 weeks of the purchase of any guitar. For pianos, that will be extended to 3 months.
What is the estimated delivery time?
We use the 24hr delivery in UK mainlands if it can be delivered by post. For Scotland and Wales, it depends on the area and the distance from our warehouse, but our aim is to get you order to your hands as soon as possible.
For products that cannot be posted, we will arrange the delivery with you to suit your schedule and deliver it to you
Do you offer international shipping?
We usually can ship instruments worldwide. Please get in touch to get a quote
What is the maintinance on your USED products?
- Guitars: Every guitar will be setup to a high playing standard before shipping. The electronics are checked and if there is any issue with guitar, it will be fixed.
- Pianos: Every piano is fully tested to make sure it's fully functional, cleaned, and if it's digital, a facroty reset is performed.
Do you offer assembly and installation?
We offer installation and assembly for pianos, drum kits, or any products that require it for and extra charge. Please get in touch so we can provide you with a quote.