The Thorn Soundlabs Black Swamp Flex Fuzz is a fuzz pedal from Nashville maker Thorn Soundlab, announced in December 2025. It is a fully analog, user-configurable fuzz designed to cover a wide range of fuzz voicings from a single enclosure: Guitar Pedal X's Stefan Karlsson called it a "versatile Multi-Fuzz covering Fuzz Face, Tone Bender and Big Muff territory"12. Delicious Audio's Paolo De Gregorio described it as "a sovereign domain of fully analog, user-configurable saturation"2.
The controls: seven knobs and two switches
The Flex Fuzz goes well beyond the usual Gain, Volume and Tone layout. Delicious Audio describes its "comprehensive seven knob control panel, which extends far beyond standard Gain, Volume, and Tone"2. Guitar World's Trevor Curwen, reviewing the pedal as part of Thorn Soundlabs' Freq series, listed the full panel: Gain, Damping, Mid Freq, Volume, Bass, Mid, Treble, a Character S/N/H switch, a Hard Clip O/I switch and a bypass footswitch3.
| Control | What it does |
|---|---|
| Gain | Sets the amount of fuzz |
| Damping | Input filter controlling how much low end reaches the distortion circuit2 |
| Mid Freq | Sweeps the center of the midrange boost or cut2 |
| Bass, Mid, Treble | Three-band EQ1 |
| Volume | Output level3 |
| Character switch | Selects Smooth, Normal or Hot clipping responses2 |
| Hard Clip switch | Toggles between soft and aggressive asymmetric clipping2 |
The tone-shaping reach is what reviewers singled out. Karlsson wrote that the pedal has "a really potent tone-shaping ability - combining 3-Band EQ with semi-parametric mids and a Damping control"1. Curwen likewise found that "the Black Swamp benefits from the tonal focusing of its semi-parametric midrange"3.
Fuzz Face, Tone Bender and Big Muff territory
The two toggles are where the pedal moves between classic fuzz flavors. The Character switch selects between Smooth, Normal and Hot clipping responses, while the Hard Clip switch toggles between soft and aggressive asymmetric clipping2. Karlsson's verdict on how they combine: "Hard Clip tightens and darkens for Big Muff styles, while Smooth, Natural and Hot! offer variations"1.
"Props to Thorn Soundlabs for a fantastically versatile circuit that easily takes you into Fuzz Face, Tone Bender, and Big Muff territory depending on how you dial it in."
Delicious Audio's description of the range is broader still: the pedal "can be tuned for articulate, amp-like drive that stacks seamlessly or pushed into raw, searing territory, all while maintaining the organic, responsive feel of a pure analog signal path"2. That puts its lower-gain settings closer to overdrive and distortion territory than most fuzzes manage.
Availability
The Black Swamp Flex Fuzz is available direct from Thorn Soundlabs and at select international dealers, including in the UK and Europe, as of Guitar Pedal X's April 2026 review1.
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Questions
Is the Black Swamp Flex Fuzz analog?
Yes. Delicious Audio describes it as a sovereign domain of fully analog, user-configurable saturation, and the pedal is built around a pure analog signal path. According to the maker's description, it can be tuned for articulate, amp-like drive that stacks well with other pedals, or pushed into raw, searing territory, while keeping the responsive feel of an analog circuit.
What does the Damping knob do?
Damping is a specialized input filter that dictates how much low end reaches the distortion circuit. In practice it is the control for tightening the pedal's foundation: less low end into the fuzz means a tighter, more focused sound, while more low end gives a fuller, looser fuzz response.
What do the Character and Hard Clip switches do?
The Character switch selects between Smooth, Normal and Hot clipping responses. The Hard Clip switch toggles between soft and aggressive asymmetric clipping. Guitar Pedal X found that Hard Clip tightens and darkens the sound for Big Muff styles, while the Smooth, Natural and Hot settings offer variations on the other fuzz flavors.
Where is the Thorn Soundlab Black Swamp Flex Fuzz made?
The pedal is made in Nashville, Tennessee, by Thorn Soundlab, according to Delicious Audio's product coverage.
Where can I buy a Thorn Soundlab pedal?
As of Guitar Pedal X's April 2026 review, the pedal is available direct from Thorn Soundlabs and at select international dealers, including in the UK and Europe.
Sources (3)
- Guitar Pedal X, Guitar Pedal X, 2026-04-03
- New Pedal: Thorn Soundlab Black Swamp Flex Fuzz, Delicious Audio, 2025-12-17
- Thorn Soundlabs Flex Series pedals review, Guitar World, 2026-08-29
