Pricing and availability

We compare 600+ stores and found this item at 4 stores. Prices updated .

Amazon
4.5 (257)
$149.00
Reverb
5.0 (30)
$149.00 New
$95.00 Used
Thomann
5.0 (2)
$139.00
Gear4Music
£159.00

Average Price: $133

Standard/Professional

$60

$181+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 1 merchant for "Keeley Moon Op Amp Fuzz". Prices shown reflect NEW condition. Tracking began Apr 23, 2026.

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Description

Elevate your guitar's sonic palette with the Keeley Moon Op Amp Fuzz pedal, a powerhouse for musicians who crave a distinctive and versatile fuzz experience. Designed to deliver a massive sound via its innovative 4-way op-amp configuration, this pedal offers a unique blend of vintage warmth and modern edge. With intuitive controls for level, filter, and fuzz, you can sculpt your tone to perfection, whether you’re aiming for a full-bodied roar or a subtle, textured growl.

The Keeley Moon Op Amp Fuzz is not just about brute force; it also offers nuanced control thanks to its filter toggle switch, which lets you effortlessly switch between flat, full, and scooped EQ settings. Its robust metal housing ensures durability, making it a reliable companion for gigs and studio sessions alike. Plus, with true bypass technology, your signal remains pristine when the pedal is disengaged, preserving the integrity of your sound.

Key Features:

  • Massive sound thanks to 4-way op-amp design
  • Controls for level, filter, and fuzz
  • Filter toggle switch for flat, full, and scooped EQ settings
  • True bypass for uncolored signal
  • Durable metal housing
  • Input and output: 6.3 mm mono jacks
  • Powered via 9V battery or optional 9V DC power supply (not included)
  • Power consumption: 10 mA
  • Made in USA

Product specs

Brand Keeley
Model Moon Op Amp Fuzz
Finish Black, Buck Moon, White / Glow-in-the-Dark
Year 2022 - 2025
Made In United States
Categories Fuzz Pedals and Effects
Pedal Format Standard

FAQs

What type of fuzz tones can I expect from the Keeley Moon Op Amp Fuzz?

The Keeley Moon Op Amp Fuzz delivers a rich, aggressive fuzz tone with a unique character, ideal for achieving thick, saturated sounds that cut through a mix, particularly suited for rock and alternative genres.

How does the Keeley Moon Op Amp Fuzz differ from traditional fuzz pedals?

Unlike traditional fuzz pedals, the Keeley Moon Op Amp Fuzz uses op-amp circuitry to provide a more consistent and stable fuzz sound with enhanced sustain and clarity across different playing dynamics.

Is the Keeley Moon Op Amp Fuzz pedal suitable for bass guitar?

Yes, the Keeley Moon Op Amp Fuzz can be used with a bass guitar, offering a full-bodied fuzz effect that maintains low-end clarity, making it suitable for bassists seeking a powerful, cutting fuzz tone.

What power supply does the Keeley Moon Op Amp Fuzz require?

The Keeley Moon Op Amp Fuzz requires a standard 9V DC power supply with a negative center pin, which is typical for most guitar pedals.

Does the Keeley Moon Op Amp Fuzz pedal have any tone-shaping controls?

Yes, the Keeley Moon Op Amp Fuzz features intuitive tone-shaping controls that allow you to adjust the fuzz level and tone, giving you the flexibility to dial in your desired sound.

Reverb

Reverb

Keeley Electronics Moon Op Amp Fuzz | Tone Report Demo

Video thumbnail for Keeley Electronics Moon Op Amp Fuzz | Tone Report Demo by Reverb

Keeley Electronics Moon Op Amp Fuzz | Tone Report Demo

Reverb

Reverb

Video thumbnail for KEELEY MOON OPAMP FUZZ - Is this the HEAVIEST muff ever? I shoot out a pile of muffs to find out by 60 Cycle Hum

KEELEY MOON OPAMP FUZZ - Is this the HEAVIEST muff ever? I shoot out a pile of muffs to find out

60 Cycle Hum

60 Cycle Hum

Video thumbnail for SO THICK | Keeley Moon Op Amp Fuzz by Riffs, Beards & Gear

SO THICK | Keeley Moon Op Amp Fuzz

Riffs, Beards & Gear

Riffs, Beards & Gear

Video thumbnail for Robert Keeley - Moon Op Amp Fuzz by gilmourish

Robert Keeley - Moon Op Amp Fuzz

gilmourish

gilmourish

Video thumbnail for Keeley Moon Op Amp Fuzz Pedal by Mike Hermans

Keeley Moon Op Amp Fuzz Pedal

Mike Hermans

Mike Hermans

Video thumbnail for Keeley Electronics Moon Op Amp Fuzz pedal - Technical Demo by Keeley Electronics

Keeley Electronics Moon Op Amp Fuzz pedal - Technical Demo

Keeley Electronics

Keeley Electronics

Video thumbnail for Keeley Moon Op Amp Fuzz by Get Offset

Keeley Moon Op Amp Fuzz

Get Offset

Get Offset

Video thumbnail for Keeley Moon Op Amp Fuzz - Pedalboards of Doom by Pedalboards of Doom

Keeley Moon Op Amp Fuzz - Pedalboards of Doom

Pedalboards of Doom

Pedalboards of Doom

Reviews

PROS

  • Not noisy, allows for quiet operation

  • Versatile tone adjustments from minimal buzz to heavy fuzz

  • Exceptional for shoegaze and post-rock genres

  • Glow-in-the-dark feature adds unique aesthetic

  • Works well with both single coils and humbuckers

  • Offers a thicker low end compared to similar pedals

  • Extremely loud, suitable for bold soundscapes

  • EQ modes provide a wide range of sonic experiences

  • Complements other effects like the Keeley Realizer well

  • Maintains clarity and detail even in dense mixes

CONS

  • Might not suit those seeking a vintage fuzz sound

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Keeley Moon Op Amp Fuzz.

Features and functionality

  • The pedal's Filter Knob below 12 o'clock results in a muddled sound, and it's noted that when turning down the guitar's volume, the sound loses clarity.

    Source
  • The pedal is designed to fit anywhere in the signal chain and works well after a drive pedal, adding a new dimension to its sound.

    Source
  • The Moon Op Amp Fuzz is noted for its thick, bass-heavy sound with a wealth of harmonics, making other pedals sound thin by comparison.

    Source
  • Despite a similar basis, the Moon Op Amp Fuzz is distinguished from the Keeley Dark Side by additional Op-Amps for increased gain and low-end enhancement.

    Source
  • The Moon Op Amp Fuzz offers better control over mid-range frequencies due to its filter knob and selector, providing users with more tonal flexibility.

    Source

Comparisons

  • Compared to the JHS Muffuleta, the Keeley Moon Op Amp Fuzz has fewer tonal options and is more bass-heavy, making the latter more suitable for stoner metal.

    Source
  • While the pedal delivers a Gilmour-inspired sound, it doesn't achieve the "Dark Side of the Moon" or "Siamese Dream" tones effectively, being better suited for modern rock fuzz.

    Source
  • The Keeley Moon's bass-heavy sound is contrasted with the Swollen Pickle's ability to dial in more mids, making the latter more suitable for lead tones.

    Source
  • The Moon Fuzz's unique low-end chugging ability is highlighted, though some prefer the Op Amp's better EQ and tonal adjustability.

    Source
  • It's compared to Fuzz War, Acapulco Gold, and Hizumitas, with users stating that the Moon Op Amp Fuzz surpasses them in heaviness and quiet operation.

    Source

Use cases and applications

  • The pedal is reported to excel with bass guitars, but users should manage volume levels carefully to avoid overpowering the signal.

    Source
  • The Keeley Moon is praised for delivering an aggressive, heavy fuzz ideal for "blowing out the windows" with its weighty low end.

    Source
  • The pedal is praised within the doom/stoner/sludge community, although it's observed that Keeley is not typically associated with heavy music genres.

    Source

Mods and upgrades

  • Pairing the pedal with a Java Booster enhances clarity and retains upper note clarity in chords, despite its inherent bass-heavy nature.

    Source

User experience

  • One user highlighted the pedal's low noise floor and aggressive gain, making it a strong contender for heavy music styles.

    Source
  • Owners emphasize the Keeley Moon's substantial volume, reaching unity at 9:00 or 10:00 on a Twin-style amp.

    Source

Critic Reviews

Keeley Electronics and The Guitar Store promise “galaxies of gain” on their exclusive Moon Op Amp Fuzz collab | Guitar World

guitarworld.com

The Keeley Moon Op Amp Fuzz pedal delivers a versatile range of fuzz tones, from gritty garage punk to smooth, velvety textures, making it a promising addition for any guitarist. Its EQ options are a highlight, providing flexibility for both single-coil and humbucker pickups. However, while the pedal shines in its tonal variety, it may struggle to stand out in a crowded market of fuzz pedals. At $149, it offers good value but doesn't necessarily redefine the fuzz experience. Overall, it’s a solid choice for those seeking a classic fuzz sound with modern adaptability.

positive

5.0 out of 5

Based on 1 Review and 2 Ratings

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E

The only fuzz pedal you will ever need

The incredible tones are impossible to describe. EQ Modes make for a magnificent fuzz experience.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

3 alternative and related items for Keeley Moon Op Amp Fuzz, curated by the Equipboard community.

Keeley Suns Ultravoid Fuzz

$89.00 - $99.00

similar sound mod

A tweaked version of the Moon Op Amp Fuzz, the Suns Ultravoid Fuzz has a redesigned tone stack with a tighter low end response.

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Artist usage

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Gear Guides

  • Added to Equipboard on by

    kkolar
    kkolar

    Gear IQ 120856