DOOM 2 is an original fuzz circuit that turns your input signal into something resembling a sawtooth wave. Unlike most fuzz-style circuits, DOOM 2 responds to your playing technique and retains note dynamics . This opens up a range of uses beyond that of a conventional fuzz. Low gain settings produce the harmonic texture of a vintage synthesizer. The power and presence of a key bass is now available in the analog domain.

No circuit changes for 2024. HIGH GAIN MOD available on request.

3 Leaf Audio

Demo by Gregor Fris

Official Product Video

Product Page

Review by Bass Musician Mag

Review by guitar pedal X

Doom 2 (blood red)

DOOM 2 is an original fuzz circuit that turns your input signal into something resembling the sawtooth wave of a vintage synthesizer. Unlike most fuzz-style circuits, DOOM 2 responds to your playing technique and retains note dynamics.
New for version 2 is the you’re / your switch. You’re is the classic DOOM sound - strong upper harmonics, a mid-focused sound, and octavia / ring modulator effects as you play up the neck. Your is a new mode that has a stronger fundamental, more low end and fewer harmonics. This mode sounds more like a traditional fuzz.

Demo by BAssTheWorld

Doom 2

Proton MK4

Official Website

Doom 2 Gray (mat white fluorescent)

Proton-Hüllkurvenfilter! Version 2 des Proton bietet denselben klassischen Sound wie das
Original, verfügt aber zusätzlich über eine Decay-Steuerung, Soft-Touch-Relay-True-Bypass und wird in einem neuen, maßgeschneiderten Gehäuse geliefert. Der Proton ist so konzipiert, dass er einen großartigen Sound liefert, ohne dass man an den Reglern herumfummeln muss.

Proton envelope filter! Version 2 of the Proton features the same classic sound as the
original, but adds a decay control, soft-touch relay true bypass, and it comes in a new custom enclosure. The Proton is designed to get a great sound without having to fiddle around with the controls.

Proton Envelope Filter MkII