The Verdigris Iron Bell is a fuzz pedal from Mojo Hand FX, sold as a limited edition finish of the company's Iron Bell and marketed as a "Gilmour" fuzz1. Mojo Hand FX describes the Iron Bell as voiced to be very open and rich, with an almost 3D-like harmonic quality1. The maker is also clear that the Iron Bell is not based on any particular Muff circuit: instead, they say they tweaked it to be a platform that is wide, yet focused1.
Controls and how they shape the sound
The pedal keeps its control set simple, with one knob doing most of the tonal work beyond level1:
| Control | What it does |
|---|---|
| Volume | Sets the pedal's output level1 |
| Tone | Sculpts the overall spectrum of the EQ, alongside Color1 |
| Color | Presence control; works with Tone to sculpt the overall EQ spectrum1 |
The Tone and Color pairing is the distinguishing feature here. Where many Big Muff style fuzzes offer a single tone control, the Iron Bell's Color knob acts as a presence control, so the two knobs together let you sculpt the overall spectrum of the EQ1. For a player chasing a particular top end, that means the fuzz can be darkened or opened up without changing the gain structure.
Where it sits in the Big Muff family
Although Mojo Hand FX says the Iron Bell is not based on any particular Muff circuit1, the pedal is commonly discussed alongside Big Muff designs. Coda Effects' circuit analysis of the Big Muff notes that many clones use 560pF capacitors in the clipping sections, and names the Iron Bell from Mojo Hand FX as an example3.
It is also worth separating the Iron Bell from Mojo Hand FX's other fuzz, the Colossus. The maker says the Iron Bell is distinct from the Colossus Fuzz, which is based on the Russian/Civil War era Muff2. Premier Guitar's 2023 review of the Colossus noted that Mojo Hand FX based that pedal on the Sovtek Big Muffs of the early '90s4. So within the company's lineup, the Colossus is the Sovtek-based design, while the Iron Bell is its own voicing aimed at a more open, rich sound.
The Verdigris Iron Bell is a limited edition finish1. If you want the circuit without the special finish, the standard Iron Bell carries the same voicing and true bypass switching2.
Power and practical details
The Verdigris Iron Bell runs on a standard center negative 9V DC supply or a 9V battery, and neither is included with the pedal1. Current draw is listed at about 12mA1, which is a light load by pedal standards and well within what a typical supply or daisy chain can handle. The enclosure measures 4.8" L x 2.62" W x 1.55" H1, a standard compact footprint that fits a crowded board without trouble.
For more on where this pedal sits among fuzz designs, see the site's Fuzz Pedals page.
Videos
gilmourish
Prymaxe
JetCityMusic
Questions
Is the Verdigris Iron Bell a Big Muff clone?
Not exactly. Mojo Hand FX says the Iron Bell is not based on any particular Muff circuit, but was tweaked to be a platform that is wide yet focused. Coda Effects' circuit analysis does class the Iron Bell among Big Muff style clones, noting it uses 560pF capacitors in the clipping sections. So it sits in the Big Muff family of sounds without copying one specific version.
Is the Verdigris Iron Bell true bypass?
Yes. Mojo Hand FX lists the Verdigris Iron Bell as true bypass, meaning the pedal's circuit is removed from your signal chain entirely when it is switched off. The standard Iron Bell is also listed as true bypass on the maker's product page.
Does the Verdigris Iron Bell run on a battery?
Yes. Mojo Hand FX says the pedal can run on a standard center negative 9V DC supply or a 9V battery, though neither is included with the pedal. Current draw is listed at about 12mA, which is light enough for most supplies.
How is the Verdigris different from the standard Iron Bell?
The Verdigris Iron Bell is a limited edition finish of the standard Iron Bell, marketed by Mojo Hand FX as a Gilmour fuzz. The circuit and controls are the same; the Verdigris version is distinguished by its limited edition finish rather than by a different voicing or feature set.
What does the Colour knob do on the Iron Bell?
Colour works as a presence control. Alongside the Tone knob, it lets you sculpt the overall spectrum of the pedal's EQ, so you can shape the top end and overall balance of the fuzz beyond what a single tone control would allow.
Sources (4)
- Verdigris Iron Bell, Mojo Hand FX
- Iron Bell, MojoHandFX
- Coda Effects, Coda Effects, 2026
- Mojo Hand Colossus Pedal Review, Premier Guitar, 2011-10-18
