The Jeds Peds Mental Moth is a fuzz, sold either as a DIY kit or as a finished pedal, that takes its circuit from a single slice of a rarer piece of gear: the fuzz section of the early-1970s Iron Butterfly Fuzz Wah, with the wah left out. Jeds Peds describes the circuit as delivering "a raw, vintage-leaning fuzz" that "excels at gritty, harmonically rich fuzz tones that clean up better than you'd expect and respond beautifully to picking dynamics and guitar volume."1 If you are weighing it against other builds, Jeds Peds also offers fuzz kits such as the Fuzz Face kit, the Red Llama kit and the Axis Fuzz kit, and the Mental Moth sits in that same family of fuzz projects.
Where the circuit comes from
Jeds Peds frames the Mental Moth as a revival of "a rare slice of early-'70s fuzz history," namely the fuzz section of the Iron Butterfly Fuzz Wah. The wah is not part of this pedal; only the fuzz circuit is. The maker is explicit that this is a comparison, not a licensed copy: "There is no endorsement or approval from any manufacturer and this information is for comparison only."1
What it sounds like
The maker's description points at a fuzz that behaves more politely than its vintage leanings suggest. Beyond the raw, gritty character, Jeds Peds highlights two things a player can use: it cleans up with the guitar's volume control better than expected, and it tracks picking dynamics. That makes it a fuzz you can ride from grit to full splat without touching the pedal.1
Versions and what you get
The Mental Moth is sold in several stages of completion, so you can take on as much of the build as you want1:
- PCB Only: just the plain PCB
- PCB & Components
- PCB & Components and off board parts
- Full Kit
- Full Kit & Drilling
- Pre Built Kit: a finished pedal, priced at £37.00 GBP1
Drilling is an optional extra for the Full Kit only, with a small surcharge. It covers all the holes needed for a complete pedal, so if you buy a lesser version you will need to source enclosure drilling yourself.1
Building it
Jeds Peds rates the difficulty as "Medium, approachable, but satisfying for newer builders." The build needs 4 knobs, and the maker suggests thin sizes such as the JP Pro Size 1 so they fit the enclosure. The enclosure specified is the JP125B with top jacks and power, meaning jacks and power enter from the top of the box rather than the sides.1
The pre-built option and its warranty
If soldering is not for you, the Pre Built Kit is a finished Mental Moth. It carries a 12 month repair warranty from Jeds Peds, but the terms are strict in one direction: "There are no returns accepted on these but I do give a 12 month repair warranty."1 In practice that means a fault within a year gets repaired, but the purchase cannot simply be sent back.
Questions
Is the Jeds Peds Mental Moth a kit or a finished pedal?
Both. Jeds Peds sells the Mental Moth in several forms, from a plain PCB through PCB with components, PCB with components and off-board parts, a Full Kit, and a Full Kit with drilling. There is also a Pre Built Kit, a finished pedal sold at £37.00 GBP as of the maker's product page dated 26 October 2026.
Does the Mental Moth include a wah?
No. The Mental Moth takes its inspiration from the fuzz section of the Iron Butterfly Fuzz Wah, but Jeds Peds builds only that fuzz section into the circuit. The wah part of the original unit is left out entirely.
How hard is the Mental Moth to build?
Jeds Peds rates the build difficulty as Medium, describing it as approachable but satisfying for newer builders. It requires 4 knobs, and the maker suggests thin sizes such as the JP Pro Size 1.
Is drilling included with the Mental Moth kit?
Drilling is an optional extra for the Full Kit, with a small surcharge. It includes all the holes needed for a complete pedal. The enclosure is the JP125B with top jacks and power.
Does the pre-built Mental Moth have a warranty?
Yes. The Pre Built Kit carries a 12 month repair warranty from Jeds Peds, but no returns are accepted on it, so the purchase is final apart from that repair cover.
Is the Mental Moth endorsed by Iron Butterfly or any manufacturer?
No. Jeds Peds states plainly that there is no endorsement or approval from any manufacturer, and that the comparison to the Iron Butterfly Fuzz Wah is for information only.
Sources (1)
- Mental Moth, Jeds Peds (jedspeds.co.uk)
