The Keeley Moon Op Amp Fuzz is a fuzz pedal from Keeley, announced in April 2022 and designed by Robert Keeley. MusicRadar described it as promising rich, saturated Pink Floyd-style fuzz sounds, with the circuit redesigned from the fuzz section of Keeley's David Gilmour-inspired Dark Side workstation to deliver extra heavy bass response without a loss of headroom1.
Controls and design
The pedal carries three controls: level, fuzz and filter1. Level sets the output volume, fuzz sets the amount of saturation, and filter shapes the tone on top.
Robert Keeley said the circuit has been redesigned with super-smooth, thick, bass-heavy response in mind1. That bass-forward voicing is the pedal's stated selling point: heavy low end held in check by the op amp design, so the fuzz does not collapse the headroom the way some fuzz circuits can1.
Where it came from
The Moon Op Amp Fuzz takes its circuit from the Dark Side workstation, Keeley's David Gilmour-inspired multi-effect pedal, and rebuilds that fuzz section as a standalone box3. Guitar World dates the pedal's unveiling to 2022, when Robert Keeley first showed it3.
The Moon Op Amp Fuzz was a limited release. It was sold only at The Guitar Store's new location in Port Townsend, WA, and through that store's Reverb shop2.
Related Keeley fuzzes
Keeley has built several fuzzes around related circuits and ideas. The Keeley Moon Fuzz is an op-amp fuzz in the lineup, priced at $1491. Other Keeley fuzz pedals include the Monterey Rotary Fuzz Vibe, the Loomer, the Black Glass British Fuzz and the Octa Psi Transfigurating Fuzz. For more on the effect type, see Fuzz Pedals.
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Questions
What controls does the Keeley Moon Op Amp Fuzz have?
The Moon Op Amp Fuzz carries three controls: level, fuzz and filter. Level sets the output volume, fuzz sets the amount of distortion, and filter shapes the tone. Robert Keeley said the circuit was redesigned with a super-smooth, thick, bass-heavy response in mind, aiming for extra heavy bass without a loss of headroom.
Who designed the Keeley Moon Op Amp Fuzz?
Robert Keeley designed the pedal, which Keeley announced in April 2022. Guitar World notes it references Keeley's David Gilmour-inspired Dark Side of the Moon workstation, with the fuzz circuit redesigned as a standalone box.
How much did the Keeley Moon Op Amp Fuzz cost?
MusicRadar reported the pedal priced at $149 when it was announced in April 2022.
Where was the Keeley Moon Op Amp Fuzz sold?
It was a limited release sold only through The Guitar Store's new location in Port Townsend, Washington, and through that store's Reverb shop. Guitar World's Jonathan Horsley wrote that those are the only places you'll find the Moon Op Amp Fuzz for sale.
Is the Keeley Moon Op Amp Fuzz based on a David Gilmour tone?
Yes. The pedal references Keeley's David Gilmour-inspired Dark Side of the Moon workstation, and MusicRadar described its sound as rich, saturated Pink Floyd-style fuzz.
Sources (3)
- Keeley announces Moon Op Amp Fuzz for Gilmour-inspired tones and beyond, MusicRadar, 2022-04-21
- Keeley Electronics and The Guitar Store promise “galaxies of gain” on their exclusive Moon Op Amp Fuzz collab, Guitar World, 2022-04-21
- Keeley launches $99 Sweetwater-exclusive pedal series, Guitar World, 2025-01-06
