The Moth Electric P. Isabella Fuzz (Ram's Head) is a fuzz pedal from an American boutique builder, and it builds on the foundation of the Big Muff v2 circuit, the version of the Ram's Head Big Muff that Electro-Harmonix sold between 1973 and 197712. Where the original had three knobs, this one carries five, adding a mids control and a clean blend, plus a toggle that switches between classic and modern modes1.
It is one of two pedals carrying the P. Isabella name; the other is based on the green Russian Big Muff made in the 1990s1. The pedal comes in a large enclosure with top-mounted jack sockets, which suits pedalboards where jacks on the sides would crowd neighboring pedals1.
Controls and what they do
The control set starts from the standard Big Muff trio and adds two knobs the original never had:
| Control | What it does |
|---|---|
| Volume | Output level, as on the original Big Muff1 |
| Tone | The Big Muff tone control, a bass/treble panning circuit13 |
| Fuzz | Gain, as on the original1 |
| Mids | A familiar mod for avoiding the Big Muff curse of vanishing in a band mix1 |
| Blend | Mixes clean signal with the fuzz, a less predictable addition1 |
| Toggle | Flips between classic and modern modes1 |
The mids knob matters more than it might look. The original Big Muff Pi's tone stage is a bass/treble panning control, and that circuit is responsible for the pedal's signature mid-scoop3. That scoop is part of the Ram's Head character, but it is also why a straight Big Muff can disappear behind a band. A dedicated mids control lets you dial the cut back without giving up the rest of the voicing1. The clean blend, meanwhile, is a less predictable feature on a Muff-style circuit, letting some of your untouched guitar signal through alongside the fuzz1.
The circuit it comes from
The Ram's Head name refers to version 2 of the Big Muff, which Delicious Audio describes as the most popular fuzz circuit sold between 1973 and 1977, later reissued by Electro-Harmonix2. Beyond the official Electro-Harmonix units, the company also built OEM rebranded V2 Ram's Head Big Muffs for other brands including Wabash, Marveltone and Lyle, which is part of why the circuit spread so widely4. A pedal like the P. Isabella Fuzz is a modern take on that lineage rather than a reissue: same foundation, with the mids, blend and mode toggle added on top1.
What the reviewer found
Guitar.com's Richard Purvis reviewed the pedal in September 2026 and scored it 9/10. On sound, he wrote:
"The sound is huge, naturally, but what's just as important is the impeccable balance of roaring rage and tonal discipline. There's no flab in the bottom end and no scratchiness in the top"1
He also compared it against a Stomp Under Foot Ram's Head, a pedal built to the same vintage circuit, and concluded that Moth's effort comes pretty close to matching the 1973 Big Muff v2 sound1. For a player weighing a boutique Ram's Head clone against this five-knob version, that comparison is the useful one: the review found the vintage character survives the extra controls.
Price, build and availability
The list price at the time of the review was $189.99 USD, quoted as £189 in the UK1. Moth Electric builds hand-soldered pedals in the United States, and the P. Isabella Fuzz is described as an American boutique fuzz box1. As of September 2026, the range was newly available in the UK through Northern Stompboxes1.
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Questions
What does the mids control do on the P. Isabella Fuzz?
It addresses the mid-scoop built into the original Big Muff tone circuit. The BMP's bass/treble panning control is responsible for that scoop3, and the mids knob is a familiar mod for avoiding the Big Muff curse of vanishing in a band mix1.
What are the classic and modern modes?
A toggle switch flips the pedal between two voices, labeled classic and modern1. The classic mode sits in the vintage Ram's Head territory the circuit is known for, while modern offers a second take on the same foundation.
How much does it cost?
$189.99 USD, or £189 in the UK, as of the September 2026 review1.
Is it hand-built?
Yes. Moth Electric makes hand-soldered pedals, and this one is an American boutique fuzz box1.
Where can I buy it in the UK?
Through Northern Stompboxes, which began carrying Moth Electric's pedals as of September 20261.
How much does the Moth Electric P. Isabella Fuzz cost?
The list price at the time of the Guitar.com review in September 2026 was $189.99 USD, given as £189 in the UK. Moth Electric's pedals were newly available in the UK through the dealer Northern Stompboxes at that time.
Is the P. Isabella Fuzz hand-built?
Yes. Guitar.com's reviewer describes Moth Electric as a maker of exquisite hand-soldered guitar pedals, and the P. Isabella Fuzz (Ram's Head) is an American boutique fuzz box from that range.
Where can I buy Moth Electric pedals in the UK?
As of September 2026, Moth Electric's pedals were newly available in the UK through Northern Stompboxes, according to the Guitar.com review. The quoted UK price for the P. Isabella Fuzz (Ram's Head) was £189.
Sources (4)
- Moth Electric P. Isabella Fuzz (Ram’s Head) review, Guitar.com, 2026-09-07
- Retro Tone Ram's Head V2, Delicious Audio, 2021-02-08
- Halo Deluxe Distortion/Sustainer, Aion FX, 2024-04-19
- The Big Muff History of All Versions Part 1, Kit Rae (www.kitrae.net), 2023-02