Silicon Fuzz · One-off prototype
Solo Fuzz
A no-frills, full-bore silicon fuzz — one knob, all roar. Built on the GuitarPCB One Knob Fuzz, a circuit in the lineage of the classic 1960s Colorsound Fuzz Box that went on to shape '70s and doom fuzz tones. Plug in, stomp, and let it snarl.
- TypeSilicon fuzz
- ControlsSingle Volume knob
- CircuitGuitarPCB One Knob Fuzz
- Power9V DC, center-negative
- StatusAvailable — one of a kind
⚠ Fine print from the void tap to expand / collapse
Not guaranteed new, not guaranteed to be any specific “clone,” and not even guaranteed to be from this universe — it might be cursed. What it definitely is: hand-built, one-of-a-kind, and straight off my bench. It's worn out its welcome here and it's time it found a new home — imperfections included.
Hand-built and one of a kind — and I stand behind it. Stops working within 30 days → full refund or free repair (I pay shipping back to me); free repairs anytime after that. Full returns & repairs terms »
What it does
Solo Fuzz is exactly what the name says: a fuzz with no menus, no fuss, and nothing to get in the way. It's a two-transistor silicon fuzz in the spirit of the ’60s Colorsound Fuzz Box — the kind of gnarly, saturated, slightly-unhinged fuzz that became a backbone of ’70s hard rock and modern doom and stoner tones. Big open chords bloom into a wall; single notes sing and spit.
The single knob is Volume, so the fuzz itself is dialed in hot and ready. The best “gain” control is your guitar: roll your volume knob back and it cleans up and softens; dig in and turn up and it roars. Simple to use, hard to put down.
Demo
Demo video coming soon.
Controls
- Volume
- The one knob — sets the pedal's output level, from unity up to a healthy boost. The fuzz is fixed and full-bore; use your guitar's volume to tame or unleash it.
Under the hood
| Circuit | GuitarPCB One Knob Fuzz — based on the classic Colorsound Fuzz Box |
|---|---|
| Transistors | Silicon NPN (BC109 / BC108, TO-18) |
| Controls | Single Volume (A500K) |
| Enclosure | Hand-painted — white with teal-and-purple splatter and a single clear knob |
| Power | 9V DC, center-negative (standard pedal supply); no battery |
| Bypass | True bypass, 3PDT footswitch |
| Build | Hand-soldered and finished by Onion Madder — a one-off prototype |
Circuit: GuitarPCB One Knob Fuzz, a circuit based on the classic Colorsound Fuzz Box. Built, painted, and finished by Onion Madder as an original one-off — not affiliated with, endorsed by, or a clone of any commercial brand.