The Life Is Unfair Bad Machine is a multi-function boost, overdrive and fuzz unit designed in collaboration between Life Is Unfair Audio Devices and Mike Cunniff of the band Boston Manor1. At its core it is an evolution of the Boss FZ-2 Hyper Fuzz circuit, extended with an HM-2-style frequency insert, an independent boost, and an MT-2 voicing, covering boost, overdrive, fuzz, octave fuzz and what Guitar Pedal X calls "Fuzzstortion" across five modes2.
Guitar Pedal X's Stefan Karlsson reviewed it and found it a clever pedal operating beautifully across all gain levels, with the independent boost a big part of the appeal overall2. His review also covers its voicing switches, including a Bass Frequency switch selecting 105Hz or 86Hz and a High End switch selecting a 3.2kHz shelf filter or 960Hz + 1280Hz HM-2 twin peaks2.
Where the circuit comes from
The Bad Machine's foundation is the Boss FZ-2 Hyper Fuzz, released in 1993 in a gray enclosure3. Aion FX describes the FZ-2 as derived from the Superfuzz with an input boost and tone stack added, and notes that under the hood it is an enormous circuit broken into four distinct parts: boost, fuzz, filter and tone4. The FZ-2 can also be used purely as a gain booster with no added distortion, one of its three original modes5.
Guitar Pedal X maps the lineage directly: the FZ-2's third Gain Boost option becomes Mode I on the Bad Machine, FZ-2 Fuzz I becomes Bad Machine Mode II, and FZ-2 Fuzz II becomes Mode III, in what Karlsson calls "a slightly more logical arrangement"2. The pedal is not the only extended-range FZ-2 take out there; Guitar Pedal X also names the Pepers' Pedals Humongous Fuzz as another2.
The HM-2 side comes from the Boss HM-2 Heavy Metal, the black counterpart to the gray FZ-26. Guitar Pedal X has described the HM-2 as having "a rather distinctive fuzz-y side to it - somewhat adjacent to the Shin-ei FY-2 Companion Fuzz - not quite" as refined, a fizzier top-end character7. On the Bad Machine, Cunniff is the author of the HM-2 Frequency insert and the independent boost2.
The five modes
The mode selector is where the Bad Machine's circuit mixing shows up. Guitar Pedal X's December 2024 listing breaks the five modes down as follows8:
| Mode | What it does |
|---|---|
| I | Boost / Overdrive: signal routed through the input gain stage and EQ, bypassing the clipping and filter sections |
| II | Thick mid frequency fuzz with subtle upper octave |
| III | Mid scooped fuzz with more prominent octave artifacts |
| IV | Combination of Modes II and III |
| V | Additional +5dB boost at 105Hz and +10dB at 4.9kHz for a metallic edge (MT-2 profile) |
The difference between Mode II and Mode III is the midrange and the octave. Mode II keeps the mids thick and the upper octave subtle; Mode III scoops the mids and makes the octave artifacts more prominent. Mode IV runs both together, and Mode V layers the MT-2 profile's low and high frequency boosts on top for what Guitar Pedal X calls a metallic edge28.
Controls
The control set, as listed by Guitar Pedal X, is2:
- Level
- Active Bass
- Active Treble
- Gain
- Boost (independent boost section)
- Bass Frequency switch: selects 105Hz or 86Hz
- High End switch: selects a 3.2kHz shelf filter, or 960Hz + 1280Hz HM-2 Twin Peaks
- Reverb switch: routes Fuzz into Boost
The Reverb switch has nothing to do with reverb as an effect. It patches the fuzz signal into the boost section, so the fuzz drives the boost in series, the Fuzz into Boost arrangement Guitar Pedal X highlights as part of the pedal's appeal2. The High End switch is where the HM-2 insert lives: the 960Hz + 1280Hz "Twin Peaks" setting mirrors the HM-2's distinctive two-point high frequency boost, while the alternative is a single 3.2kHz shelf2.
Editions and colors
The first editions of the Bad Machine came in the familiar Boston Manor red and black, with textured early Boss style knobs. The second editions came in pink and light blue2.
Price and reviewer reception
Guitar Pedal X listed the Life Is Unfair x Boston Manor Bad Machine at £230, equivalent $313, in December 20248. As of August 2026, the price was still £230, equivalent $313, on Life Is Unfair's Reverb store2.
Karlsson's verdict was strong across the board:
"the Bad Machine is the Emperor of that domain now - just superb every which way - sounds utterly fantastic -"
He found it a clever pedal operating beautifully across all gain levels, with the independent boost a big part of the appeal overall2. The review also details its voicing options: a Bass Frequency switch that selects 105Hz or 86Hz, and a High End switch that selects a 3.2kHz shelf filter or 960Hz + 1280Hz HM-2 twin peaks2.
Videos
Raccoon Point Studios
ambienttrash
Jackson Brooksby
Questions
Who designed the Bad Machine?
The Bad Machine was designed in collaboration between Life Is Unfair Audio Devices and Mike Cunniff of the band Boston Manor. Guitar Pedal X describes it as a genuine collaboration between Grindle of Life Is Unfair and Cunniff, with Cunniff the author of the HM-2 Frequency insert and the independent boost.
What does the Reverb switch do on the Bad Machine?
Despite its name, the Reverb switch does not add reverb. It routes the fuzz signal into the boost section, giving you the Fuzz into Boost combination in one pedal. It is one of the switches alongside Bass Frequency and High End that shape the EQ.
What is the difference between Mode II and Mode III?
Mode II is a thick mid frequency fuzz with a subtle upper octave. Mode III is a mid scooped fuzz with more prominent octave artifacts, so it has a scooped midrange and a stronger octave character. Mode IV combines the two.
How much does the Bad Machine cost in US dollars?
Guitar Pedal X listed the Life Is Unfair x Boston Manor Bad Machine at £230, equivalent to $313, in December 2024. As of August 2026 the price was still £230, equivalent $313, on Life Is Unfair's Reverb store.
What colors did the Bad Machine come in?
The first editions came in the familiar Boston Manor red and black, with textured early Boss style knobs. The second editions came in pink and light blue.
Sources (8)
- Bad Machine by Life Is Unfair Audio Devices, RockBoard PedalPedia, 2026
- Guitar Pedal X, Guitar Pedal X, 2024-10-14
- Hypercube Fuzz Distortion / BOSS® FZ-2 Hyper Fuzz, Aion FX, 2021-05-28
- Argent Silicon Fuzz / BOSS FZ-3, Aion FX, 2021-11-23
- Hype-R-Fuzz PCB, Griffin Effects
- Boss reignites the Hyper Fuzz Hype with new teaser, Guitar.com, 2020-11-13
- Guitar Pedal X, Guitar Pedal X, 2024-02-20
- Guitar Pedal X, Guitar Pedal X, 2024-12-18
