Demiurge Instruments Doomy O)))

The Demiurge Instruments Doomy O))) is an analog fuzz, booster and octaver in a single compact enclosure. The maker bills it as a "FUZZ BOOSTER OCTAVER" and sums up its character in typically direct terms: "Open the Gates of Hell with this adorable pink little box. the Doomy-O)))"¹. It belongs to the family of fuzz pedals that stack a distortion-style clipping stage with an octave circuit and a boost, a combination that has become its own sub-genre of heavy pedal.

Where it comes from

The Doomy O))) is a take on the EarthQuaker Devices Sunn O))) Life Pedal format, which pairs a Rat-style distortion with an octave and a boost. Guitar Pedal X's Stefan Karlsson, writing in a 2024 buying guide, put it plainly: "The combination of Rat Distoriton, Octave and Boost always sounds fantastic"². RockBoard's PedalPedia describes the pedal as "Mimicking a popular Doom-laden pedal of recent times", offering "the same sound in a cute fun box thats very pedalboard friendly"¹. Guitar Pedal X has also noted that Demiurge Instruments has been making a compact Doomy O))) "for the best part of a decade already", as of a June 2026 news piece³.

Controls

The pedal carries a full set of controls for a compact box, as listed in Guitar Pedal X's 2024 guide²:

Distortion and Filter: the gain and tone shaping of the Rat-style stage
Amplitude: the octave volume
Magnitude: the overall volume
Mode: a three-way switch, OpAmp / Asymmetrical / Symmetrical
Octave: blend and depth of the octave
Boost footswitch and Bypass footswitch

The Mode switch and the separate Octave control give the player a good deal of shaping over how prominent the octave sits in the fuzz, which is where this design stands or falls².

What reviewers said

Guitar Pedal X's verdict was positive on the octave circuit in particular. Stefan Karlsson wrote that "Joseph has managed to significantly improve the tonality of the octave by swapping in a specially selection Silicon Diode octave"². In other words, the builder replaced the stock octave diode with a hand-selected silicon diode to refine the upper octave's character, the detail that most often separates octave fuzzes from one another.

Videos

**Doomy O))) | Lifepedal Clone**
Metalhead Productions

**Demiurge Instruments Doomy O)))**
Pedal Experiments

**Demiurge Instruments - Doomy-O))) Demo**
Noise Merchants

Questions

Is the Demiurge Instruments Doomy O))) analog or digital?

The maker lists the Doomy O))) as an analog circuit on its RockBoard PedalPedia product page. It draws 15mA of current, so it sits comfortably within the budget of a standard pedalboard power supply, though the page does not give a voltage figure, so treat the maker's power guidance as the reference when hooking it up.

What pedals is the Doomy O))) based on?

The Doomy O))) follows the format of the EarthQuaker Devices Sunn O))) Life Pedal, which combines a Rat-style distortion with an octave circuit and a boost. Guitar Pedal X describes the Demiurge as a compact take on that Life Pedal format, and the maker describes it as mimicking a popular doom-laden pedal of recent times.

Sources (3)

Doomy O))) by Demiurge Instruments, RockBoard PedalPedia, 2026
Guitar Pedal X, Guitar Pedal X, 2024-08-30
Guitar Pedal X, Guitar Pedal X, 2026-06-17