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MJM London Fuzz Red w/ Bias Knob

MJM London Fuzz Red w/ Bias Knob

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Page last updated Mar 30, 2026

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Description

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Step into a world of vintage tone with the MJM London Fuzz Red w/ Bias Knob, a fuzz effects pedal designed for guitarists who crave that classic, saturated sound. Inspired by the legendary fuzz tones of the late '60s and early '70s, this pedal is crafted to deliver rich, harmonic distortion that cuts through the mix. With its simple yet powerful controls, including a unique bias knob, you have the flexibility to shape your sound from smooth and creamy to aggressive and gritty. Whether you're dialing in a subtle boost or a full-on fuzz assault, the London Fuzz accommodates every playing style.

The bias knob is a standout feature, offering you the ability to adjust the transistor bias for different tonal characteristics. This allows you to explore a wide range of fuzz textures, making it an ideal choice for both studio sessions and live performances. The pedal is built with high-quality components to ensure reliability and durability, making it a solid addition to any pedalboard. Its true bypass design ensures that your guitar's natural tone remains uncolored when the pedal is not engaged.

Key Features:

Inspired by classic fuzz tones of the '60s and '70s
Unique bias knob for adjusting transistor bias
Simple controls for easy sound shaping
High-quality components for durability
True bypass design to maintain guitar tone integrity
Suitable for both studio and live performance settings

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MJM London Fuzz Red w/ Bias Knob.

Features and functionality

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The MJM London Fuzz includes a bias knob, allowing for more control over the fuzz's texture, from smooth to more gated and raspy sounds.
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The MJM London Fuzz is noted for its simple "basic circuit," which retains vintage characteristics and may react to buffered wah placement.
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Comparisons

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The MJM London Fuzz with bias knob is comparable to the JHS 3 Series Fuzz and Analogman Sun Face in terms of tonal versatility.
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The MJM London Fuzz is mentioned alongside the Sunbender 1.5 for its ability to produce a raspy/gated sound, which some users prefer over the Sun Face.
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The MJM London Fuzz is compared to the Chase Tone Red (BC183) for its unique feel and mids knob, which performs better in larger band settings.
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The MJM London Fuzz is suggested as a "sleeper option" for its straightforward Fuzz Face style, similar to the Tru-Fi Two Face's silicon and germanium mixture.
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The MJM London Fuzz faces competition from the Fulltone '69, praised for better cleanup and more gain than many other fuzz faces.
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Use cases and applications

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It's ideal for achieving Eddie Hazel-inspired tones, particularly effective for replicating the sound on "Maggot Brain."
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Mods and upgrades

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Users recommend trying a silicon version for an even more aggressive, nastier fuzz tone.
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Setup and maintenance

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Users advise keeping vintage fuzzes, like the MJM London Fuzz, away from electronics such as routers, cellphones, or TV remotes to minimize noise interference.
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User experience

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Some owners express that the MJM London Fuzz is excellent for achieving "massive fuzz face on steroids" sounds, comparable to the Frost Giant Massif.
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