The JAM Pedals "White Mountaintops" Red Muck mk.2 is a Muff-style fuzz with a twist: a separately tuned boost section built into the same box, engaged by its own footswitch. JAM Pedals classifies it as a fuzz/distortion pedal1, and Delicious Audio's Paolo De Gregorio calls the Red Muck MK2 a "Muff-style fuzz"2. The circuit draws on two eras of the Big Muff, combining early Triangle and later Red Army/Civil War influences, which the maker says covers singing sustain, dense saturation and multiple compression levels1.
The controls and footswitches
The pedal carries three knobs and two footswitches, so the boost and the fuzz can be brought in separately during a set1.
The right footswitch engages the main fuzz effect. The left footswitch engages the boost, a separately tuned section placed before the fuzz, and an internal trimmer inside the pedal sets that boost's level1. Because the trimmer is internal, the boost level is set once to taste rather than adjusted from the top panel mid-song.
A toggle selects between two clipping modes: symmetrical clipping, which JAM Pedals says matches the Red Muck mk.1, or asymmetrical clipping for a different response and harmonic texture1. Players who know the earlier Red Muck can therefore get that pedal's clipping character, or move to the second mode for something with a different harmonic flavor.
The Red Muck mk.2 and its custom artwork versions
The White Mountaintops is one of several custom artwork versions of the Red Muck mk.2. JAM Pedals describes the range as "Same sound, different artwork"1. The variants named on the maker's pages are:
- "Feline" Red Muck mk.213
- "Lunar Muck" Red Muck mk.214
- "Achenbach" Red Muck1
- "Noufaro" Red Muck mk.215
- "Relic" Red Muck1
Each of these has its own page on the maker's site, and the standard Red Muck mk.2 is listed as a fuzz/distortion there as well6. The artwork is hand painted: JAM Pedals states that "Every custom artwork pedal is a one-of-a-kind hand-painted piece," and that the pedal you receive will differ in detail from the photos on the product page1.
Because each unit is hand painted, the White Mountaintops you receive will not match the product photos exactly. JAM Pedals says the pedal will differ in detail from the pictures shown1.
What players and reviewers said
Sonic Youth's Lee Ranaldo is quoted on the maker's product page: "The Red Muck immediately joined my pedal board. It is a great new favorite!"1
Delicious Audio's Paolo De Gregorio presented the Red Muck MK2 as a Muff-style fuzz, publishing demo videos of the pedal on the site2.
Related pages
- JAM Pedals "Lunar Muck" Red Muck mk.2
- JAM Pedals "Noufaro" Red Muck mk.2
- JAM Pedals "Feline" Red Muck mk.2
- JAM Pedals "Relic" Red Muck
- JAM Pedals "Achenbach" Red Muck
- Fuzz Pedals
Questions
Does the White Mountaintops sound different from other Red Muck mk.2 pedals?
No. JAM Pedals lists the White Mountaintops alongside the other custom artwork versions of the Red Muck mk.2, including the Feline, Lunar Muck, Noufaro and Relic editions, and describes them all as the same sound with different artwork. The differences between these pedals are visual: each carries its own hand-painted design, while the circuit, controls and clipping toggle are shared across the range.
What are the two clipping modes on the Red Muck mk.2?
A toggle selects between two clipping arrangements. One is symmetrical clipping, which JAM Pedals says matches the Red Muck mk.1. The other is asymmetrical clipping, which the maker describes as giving a different response and harmonic texture. Players can switch between the two to change how the fuzz compresses and which harmonics it emphasizes.
How is the boost level set on the Red Muck mk.2?
The boost level is set by an internal trimmer rather than an external knob. The left footswitch engages a separately tuned section placed before the fuzz, and an internal trimmer inside the pedal sets that section's level. Once you have dialed the trimmer to taste, the footswitch brings the boost in and out during play.
Is the White Mountaintops artwork hand painted?
Yes. JAM Pedals describes every custom artwork pedal, including the White Mountaintops, as a one-of-a-kind hand-painted piece. The maker notes that the pedal you receive will differ in detail from the photos shown on the product page, since each unit is painted individually.
Which Big Muff circuits is the Red Muck mk.2 based on?
JAM Pedals says the circuit combines influences from two eras of the Big Muff: the early Triangle version and the later Red Army, also called Civil War, version. The maker describes the resulting sound as covering singing sustain and dense saturation, with multiple compression levels available.
Sources (6)
- “White Mountaintops” Red Muck mk.2, JAM Pedals (www.jampedals.com)
- JAM Pedals Red Muck MK2 Fuzz, Delicious Audio, 2026-06-19
- "Feline" Red Muck mk.2, JAM Pedals (www.jampedals.com)
- "Lunar Muck" Red Muck mk.2, JAM Pedals (www.jampedals.com)
- “Noufaro” Red Muck mk.2, JAM Pedals (www.jampedals.com)
- Red Muck, JAM Pedals (jampedals.com)
