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Stromer Mutroniks Superfuzz SF-2

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Page last updated Mar 22, 2026

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Description

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It's based on a 1976 Shin Ei Companion SF-1 fuzz that I used to have. The two switches are Octave on/off, a feature that was added to make the fuzz more versatile, and the tone switch that works just like the one on the original shin ei. On my vintage pedal the Fuzz (aka Expander) knob worked more like another volume control and wasn't very useful, but in this version it can take you from overdrive territory to full on fuzz. Especially if you turn off the octave. But yeah, I think the video demo explains it better than I can.

Product specs

Power	9V
Bypass	true bypass
Analog/Digital	analog

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Stromer Mutroniks

Stromer Mutroniks Superfuzz SF-2

Stromer Mutroniks

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Stromer Mutroniks Superfuzz SF-2.

Features and functionality

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The fuzz control offers a range from a unique overdrive to an intense blown-out fuzz, with a loud volume output exceeding unity at 2-3 settings.
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The pedal includes a hidden third fuzz mode, achieved by positioning the switch between Fuzz 1 and Fuzz 2, combining both settings for a unique sound.
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The boost feature is praised for significantly enhancing overdrive pedals and amplifiers, adding substantial power to the overall sound.
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The Tru-Fi Super Fuzz allows disengaging the octave and blending between two mid circuits, closely replicating the Univox and Shin-ei versions.
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The Unsound Circuitry Hyper Pozzum offers versatile tone control and a clean blend that doubles as a boost through an internal trimpot adjustment.
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Comparisons

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Compared to other Superfuzz circuits, this model boasts a prominent octave-up effect and allows toggling the octave on and off, distinguishing it from other variants.
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The Fuzz 1 setting can achieve a velcro-like fuzz sound when settings are around noon, offering a distinct texture to the audio.
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The Behringer SF300, a Boss FZ-2 clone, is noted for its brutal doom fuzz, offering exceptional value at approximately $30, despite its plastic enclosure.
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User experience

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Owners highlight the pedal's unapologetic loudness, describing it as "loud as shit," which might require careful volume management in various setups.
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Users appreciate the pedal for producing a rich, meaty sound on both guitar and bass, particularly in the Fuzz 2 setting, which evokes a modern Jack White tone.
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Use cases and applications

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Works effectively for cutting through mixes in bass solos, particularly when using the octave fuzz setting, which enhances presence and clarity.
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Ideal for stoner and doom metal genres, this pedal also excels in creating garage rock tones, making it versatile across various musical styles.
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Owners report that running the pedal with a tube head on the edge of breakup maximizes its potential, pushing tones into a powerful, overdriven realm.
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The Idiotbox Ron Swanson Fuzz, described as "stupid fuzz," is recommended after positive experiences from users who appreciate its unique sound.
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Mods and upgrades

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The Schenkenstein Boogie Van features socketed transistors, allowing swaps with Soviet-era germanium MP37B and Motorola 2N2222 transistors for customized tones.
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