The JAM Pedals "Lunar Muck" Red Muck mk.2 is a Muff-style fuzz and distortion pedal with a dedicated boost section built in, engaged by its own footswitch. JAM Pedals describes the circuit as combining early Triangle and later Red Army/Civil War influences, covering singing sustain and dense saturation1. It is one of several custom artwork editions of the Red Muck mk.2, each hand painted, with the same sound and different artwork across the range1.
A Muff-style fuzz with a dedicated boost
The Red Muck mk.2 sits in the Big Muff tradition of fuzz pedals. JAM Pedals says the circuit combines early Triangle and later Red Army/Civil War influences, the names players use for different eras of the Electro-Harmonix Big Muff, and that it covers singing sustain and dense saturation1. For a player, that means a heavy, sustaining fuzz voice with a toggle to shift its clipping character.
The boost is the mk.2's distinguishing feature. The left footswitch engages a separately tuned section placed before the fuzz, and an internal trimmer sets its level, so the boost can push the fuzz stage harder without adding an external control to the top panel1. The right footswitch engages the main effect1.
The controls and footswitches
The two footswitches work independently: the right one brings the fuzz in and out, the left one brings the boost in and out1. A toggle selects between the two clipping modes1.
Two clipping modes
The mk.2's toggle selects symmetrical clipping, which JAM Pedals says matches the Red Muck mk.1, or asymmetrical clipping for a different response and harmonic texture1. In plain terms, symmetrical clipping clips the signal evenly in both directions, the way the original Red Muck did, while asymmetrical clipping clips it unevenly, which changes the harmonic content and the way the fuzz responds to your playing. If you want the mk.1's voice, the symmetrical setting is there; the asymmetrical setting is what the mk.2 adds.
Custom artwork editions
The Lunar Muck is one of several custom artwork versions of the Red Muck mk.2 offered by JAM Pedals, described as same sound, different artwork1. The range includes:
- "Feline" Red Muck mk.22
- "Achenbach" Red Muck1
- "Noufaro" Red Muck mk.21
- "Relic" Red Muck1
- "White Mountaintops" Red Muck mk.21
JAM Pedals says every custom artwork pedal is a one-of-a-kind hand-painted piece, and the pedal you receive will differ in detail from the photos shown on the product page1. The standard Red Muck mk.2 carries the same circuit without the hand-painted enclosure3.
Because each Lunar Muck is hand painted as a one-off, the artwork on the unit you receive will not match the product photos exactly1.
Price, shipping and returns
The Lunar Muck lists at £294.00 GBP as its regular price1. For UK buyers, JAM Pedals ships free, shipped DDP with 20% UK VAT and all duties included, so there are no extra charges on delivery1. The maker offers a 30-day money-back guarantee: if within 30 days of receiving the product you are not satisfied and wish to return it, you get a refund no questions asked1.
What players and reviewers said
Sonic Youth's Lee Ranaldo is quoted by JAM Pedals on the Red Muck: "The Red Muck immediately joined my pedal board. It is a great new favorite!"1
gilmourish.com's verdict, quoted by Delicious Audio's Paolo De Gregorio: "I warmly recommend the Red Muck"4
Questions
What is the difference between the Red Muck mk.1 and mk.2?
The mk.2 adds a second clipping mode. Its symmetrical clipping setting matches the Red Muck mk.1, while the asymmetrical setting gives a different response and harmonic texture. The mk.2 also carries a dedicated boost section on the left footswitch, with an internal trimmer to set its level.
Is the Lunar Muck a different circuit from the standard Red Muck mk.2?
No. The Lunar Muck is a custom artwork edition of the Red Muck mk.2. JAM Pedals describes the custom artwork versions as same sound, different artwork, so the circuit, controls and clipping toggle are the same as the standard mk.2.
What does the left footswitch do on the Red Muck mk.2?
The left footswitch engages a separately tuned boost section that sits before the fuzz. An internal trimmer sets the boost's level, so you can dial in how much it pushes the fuzz stage without touching an external knob.
What are the two clipping modes on the Red Muck mk.2?
A toggle selects between symmetrical clipping, which matches the Red Muck mk.1, and asymmetrical clipping, which JAM Pedals says gives a different response and harmonic texture. Switching between the two changes how the fuzz compresses and saturates.
Is every Lunar Muck pedal painted the same?
No. JAM Pedals says every custom artwork pedal is a one-of-a-kind hand-painted piece, and the pedal you receive will differ in detail from the photos shown on the product page.
What is the return policy on JAM Pedals?
JAM Pedals offers a 30-day money-back guarantee: if you are not satisfied within 30 days of receiving the product and wish to return it, you get a refund, no questions asked.
Sources (4)
- "Lunar Muck" Red Muck mk.2, JAM Pedals (www.jampedals.com)
- "Feline" Red Muck mk.2, JAM Pedals (www.jampedals.com)
- Red Muck, JAM Pedals (jampedals.com)
- JAM Pedals Red Muck MK2 Fuzz, Delicious Audio, 2026-06-19

Jim Campilongo




