Iridium FX Pythagoras – Prototype Hand-Built Octave/Fuzz (Custom Big Muff)

Iridium FX Pythagoras – Prototype Hand-Built Octave/Fuzz

Designed and hand-built in the USA by me, Pythagoras is a dual-effect octave/fuzz built around a modified Triangle Big Muff-style circuit paired with a Green Ringer-inspired analog octave-up effect.

While the fuzz began as a Triangle Muff platform, I intentionally experimented with component values and voicing choices to push it into its own territory rather than simply cloning a vintage unit.

The octave section is based on the classic Green Ringer topology — a heavily clipped, sputtering analog octave-up effect known for its aggressive harmonic texture and synth-like character. Depending on your guitar and pickup selection, the octave effect is often more pronounced when using the neck pickup.

The two effects can be reordered on the fly, dramatically changing the interaction and overall character of the pedal.

Controls

Volume

Overall output level of the fuzz circuit.

Mids

Adjusts the tonal balance of the tone stack, ranging from:

• fuller, darker tones with stronger midrange presence
  to
• brighter, more scooped classic Muff-style voicings

The effect of this control becomes less pronounced as the Tone control is turned counter-clockwise.

Tone

Classic Big Muff-style tilt EQ control. Highly interactive with the Mids control.

Sustain

Controls the gain and saturation of the fuzz circuit.

Footswitches

Octave

Engages/disengages the Green Ringer-style octave-up effect.

Order

Changes which effect appears first in the signal chain.

The small LEDs indicate the current routing order. One order LED will always remain illuminated whenever the pedal has power.

Fuzz

Engages/disengages the Muff-style fuzz circuit.

Additional Notes

The octave circuit uses fixed gain and output settings.

All three footswitches are soft-touch and utilize relay-based switching.

Condition

This pedal is a prototype from my personal collection, originally built in 2024. Functionally it is excellent and, for all practical purposes, new. There are a few light cosmetic scratches on the enclosure from handling and storage.

Hand-built in small numbers. Prototype unit.