Almost every fuzz pedal ever built gives you a tone control that takes something away. The Keeley Fuzz Bender gives you two that put something back — twenty decibels of it, at each end of the spectrum, from an active circuit that behaves less like a stompbox and more like a channel strip on a recording console.
That single design decision is why this pedal exists, and it is the thing that most shoppers miss when they scan the product photo and file it mentally under “another Tone Bender clone.” It is not a Tone Bender clone. It borrows the three-transistor architecture and the second half of the name, then does something no Sixties fuzz ever attempted: it hands you a proper equaliser, a variable transistor bias, and enough authority to reshape the fuzz from the inside out rather than just filtering the mud off the top.
Robert Keeley showed it to the world at NAMM 2019 alongside the Synth-1, the DDR and the Eccos. Seven years later it is still in the catalogue at the same $149 it launched at, still tagged Active on Keeley’s own site, and still one of the least-understood fuzz boxes in the American boutique market. This is the article that explains what it actually does, who genuinely uses it, and — importantly — which of the famous names attached to it online do not belong there at all.
The Name Problem: What “Bender” Actually Means Here
Start with the thing that trips everybody up, because it determines whether you will be delighted or disappointed by the pedal you receive.
The Tone Bender is a British fuzz lineage that began in 1965 in Gary Hurst’s workshop and ran through several radically different circuits — the two-transistor MkI and MkI.5, the three-transistor MkII, the reworked MkIII and MkIV — all of them germanium, all of them dark, spitty and gloriously ill-behaved. The MkII is the one everybody chases: the circuit associated with the heaviest late-Sixties British lead tones and with an entire industry of modern reissues and boutique reinterpretations.
The Keeley Fuzz Bender takes the topology — three gain stages in a row, which is what a MkII does — and then diverges immediately and deliberately. Premier Guitar’s Dave Hunter, reviewing it in the magazine’s 2019 pedal issue, put it precisely: Keeley “added significant and original twists to the vintage 3-transistor Tone Bender template,” and named the two key differences as “a hybrid array that blends two silicon and one Japanese-made germanium transistor, and a rare active EQ stage.”
So: not a reissue. Not a clone. A modern fuzz that acknowledges its ancestry in the name and then argues with it. Keeley’s own marketing copy says the quiet part out loud — the Fuzz Bender is billed as “a modern fuzz pedal,” and the company’s headline claim is that active EQ “gives you the ability to create massive fuzz tones not possible with typical square-wave boxes.”
Why Anybody Would Mix Silicon and Germanium
The two transistor families do different jobs and have opposite personalities. Germanium is warm, soft-kneed, touch-sensitive and thermally unstable — it sags, it cleans up when you roll the guitar volume back, and it drifts when the stage lights get hot. Silicon is higher gain, brighter, more consistent, more aggressive, and it holds its bias when the room does not.
Fuzz designers usually pick a side. Keeley picked both: two high-gain silicon devices for the output and consistency, and one vintage Japanese germanium transistor for the character. Keeley’s own product copy says the pedal “is built around vintage Japanese germanium to create its monumental fuzz tones” — note the framing, which puts the germanium at the centre of the identity even though it is outnumbered two to one.
That configuration matters practically. A pure-germanium fuzz such as a vintage-spec Fuzz Face circuit will change its behaviour noticeably between a cold soundcheck and a hot third song. The hybrid arrangement gives the Fuzz Bender a great deal more thermal stability while keeping some of the germanium bloom. It is an engineering compromise chosen on purpose, not a cost-saving fudge.
Specifications
The Circuit, Explained Without the Hand-Waving
The Gyrator EQ Is the Whole Point
A gyrator is an active circuit that makes a capacitor behave like an inductor. In an audio context that lets a designer build a genuine bandpass boost-and-cut section — the kind you find in a mixing console or a graphic EQ — without the size, cost and hum-pickup of a physical inductor. It is the same trick that gives certain classic EQ pedals their authority.
Keeley’s own description of the Fuzz Bender’s EQ is that the two gyrators are “designed to approximate the performance of mixing-desk controls,” and the published figure is over 20 dB of boost and cut at 100 Hz for the Bass knob and 10 kHz for the Treble knob. Both knobs sit flat at noon.
Twenty decibels is a lot. To put it in perspective, the tone control on a passive fuzz is a filter that can only remove content; a typical amplifier’s bass knob might swing eight to twelve decibels. Twenty dB of boost at 100 Hz through a cranked fuzz is a structurally different sound — it is not “a bit warmer,” it is a physical event. Guitar.com’s Michael Watts, who scored the pedal 9/10 in July 2019, wrote that “if you’ve never punished your amp with +20dB of bass, then we can wholeheartedly recommend you try it at least once. It’s a huge sound!”
The Treble band is equally consequential and behaves in a way you would not predict. Because it is centred up at 10 kHz rather than the 2–4 kHz region where most fuzz “tone” controls live, pushing it hard does not simply add presence — it starts to excite the upper harmonic content the fuzz is already generating. Watts noted that “the more you boost it, the closer it gets to an octave effect with the capacity to coax out some extra beeps and squeals as you explore.” That is a real, usable octave-fuzz-adjacent voice hiding inside a pedal that is not marketed as an octave fuzz at all.
Bias Is Not a Gate
This is the single most common misreading of the Fuzz Bender, and it comes from the pedal’s proximity in people’s minds to sputter-machines like the ZVEX Fuzz Factory.
The Bias knob adjusts how hot or cold the transistors are biased. That changes the operating point of the gain stages, which in turn changes sustain, compression, attack shape and the fundamental character of the distortion. Guitar.com was explicit about the distinction: “This is not quite a gate as such; instead, it regulates the shape of your sound from square wave overload to spikey, sawtooth chaos.”
Dave Hunter’s description in Premier Guitar covers the same ground from the other direction, and it is worth quoting because it corrects a second misconception — that a bias knob is only good for broken-sounding novelty tones. He found the control “delivers much more than just dying-battery decay and ripped-Velcro sounds that extreme noise chasers enjoy,” running “from thick, warm, and creamy to bright, spitty, splatty, and glitchy, with almost octave-divided upper harmonics.”
In practical terms: counter-clockwise Bias gives you the fattest, most saturated, most Muff-adjacent voice with the longest sustain. Rotating clockwise progressively starves the circuit, tightening the low end, adding spit and eventually producing the stuttering, gated decay that some players love and others find unusable. Because it is a continuous knob rather than a two-position switch — the arrangement most twin-transistor fuzzes use — you can park it anywhere on that continuum. Guitar.com again: “a knob-based blend makes for a far smoother experience.”
The Big Knobs Are a Deliberate Feature, and Also a Hazard
Level and Fuzz are physically oversized. Keeley’s own bullet list calls them “ginormous Level and Fuzz controls you can move with your feet!” — the intention being that you can adjust output and gain mid-song without crouching.
Premier Guitar listed the flip side of that under “Cons”: “Take care to avoid stepping on those big knobs while stomping the footswitch mid-performance.” That is the honest trade-off, and it is worth thinking about before you buy. On a crowded board where your foot has to land in a small target area, oversized knobs adjacent to the switch are a real-world risk.
Famous Players: What Is Actually Documented
This is the section where most gear writing about the Fuzz Bender falls apart, because the pedal has been reviewed enthusiastically and adopted quietly. There is no marquee arena guitarist whose signature sound is a Fuzz Bender. What there is, is a genuinely interesting spread of working players across indie rock, art rock, film scoring and classic new wave — and a couple of famous names that get attached to the pedal purely through misreading a review.
The evidence is graded below into three explicit tiers, because they are not equally strong.
Tier 1 — Documented on a Board, With Detail
Elliot Easton (The Cars) is the best-documented user and by a distance the most surprising name on the list. The Fuzz Bender that appears on his studio board is not a stock unit — it is the ‘Tuxedo’ Custom Shop Edition, and the board itself was assembled by Sean Spears of Keeley Electronics, photographed and posted to the Keeley Sound Check open guitar effects forum. That is about as close to first-party confirmation as a non-endorsement gets: the builder’s own staff put the board together, and the photograph documents which unit went on it.
Easton is worth dwelling on because the connection is counterintuitive. His reputation rests on some of the most economical, melodically perfect, tightly-produced lead playing in new wave — the solos on The Cars and Candy-O are studies in restraint, not in fuzz. A player with that instinct choosing a five-knob hybrid fuzz for studio work tells you something real about the pedal: the EQ section makes it a surgical device, not just a chaos generator. You can sit a Fuzz Bender inside a dense arrangement and carve it a slot, which is exactly what you cannot easily do with a stock Big Muff Pi.
Carrie Brownstein (Sleater-Kinney) appears with a Fuzz Bender in a photographed gear layout circulated under the title “SK gear,” with the pedal visible at the lower right of the setup. Sleater-Kinney’s guitar sound is one of the defining textures of American post-riot-grrrl rock — two guitars, no bass for most of the band’s history, everything carried by mid-range grind and interlocking parts. A fuzz with 20 dB of variable bass boost is a very sensible tool for a band whose low end has to come from a guitar amp. Brownstein is not currently in the GuitarGangsters guitarist index, so she is named here in prose with the source attached rather than linked.
Sarah Lipstate (Noveller) posted to Instagram about receiving a Fuzz Bender from Keeley Electronics and stated her intention to put it on her pedalboard. Note the honest limitation on this one: an artist announcing a pedal’s arrival is a stronger signal than a name on a roster, but it is weaker than a photograph of a finished board. Lipstate’s work — long-form instrumental guitar composition, layered texture, extensive processing, and a live rig that has supported Iggy Pop and Nine Inch Nails — is the kind of context where a fuzz with a real EQ stage earns its place, but the article will not pretend the sighting is more than it is.
Tier 2 — Photo and Video Sightings
Josh Jenkinson (Inhaler) is visible using the pedal at the 3:48 mark of the band’s “My Honest Face (Live From Somewhere)” video. Inhaler’s guitar sound sits in the big, chiming, reverb-forward tradition of Irish rock, and the Fuzz Bender turns up as the escalation device rather than the base tone.
Lars Lillo-Stenberg (deLillos) — the Norwegian songwriter has the pedal documented on boards confirmed as his and used live, with the Fuzz Bender specifically noted as a studio tool.
Andrew Aged, the LA session and touring guitarist whose credits run through a great deal of contemporary alternative and pop production, has been photographed with the Fuzz Bender on a live board.
Gürhan Öğütücü (Adamlar) has the pedal visible on his pedalboard — a nice illustration that this is a pedal with genuine international circulation rather than a purely North American niche item. Jakob Betke (Milliarden) rounds out the documented list on photographic evidence.
Tier 3 — Names That Do Not Belong Here
Two very large names circulate in Fuzz Bender discussions and neither has any documented connection to the pedal. Both trace to a single sentence in one review.
In his Premier Guitar verdict, Dave Hunter wrote that among the Fuzz Bender’s many voices “it’s not hard to find the familiar sounds that, say, Dan Auerbach or Gary Clark Jr. make their stock in trade.” Read the grammar. That is a reviewer describing a tonal territory the pedal can reach. It is not a claim that either player owns one, has used one, or has ever seen one. Both men have extensively documented rigs and neither includes a Fuzz Bender.
The same caution applies to the fuzz-revival names invoked in Guitar.com’s opening paragraph — Jack White, Annie Clark and Auerbach again — who are cited there as the reason fuzz became fashionable in the 2010s, not as Fuzz Bender users. This is a pattern worth internalising across all gear research: a review’s scene-setting paragraph is not a user list.
Honest Corrections
The Current-Draw Figure Is Published Two Ways
Keeley’s own product page and the archived 20 for 20 edition page both state “9 volt DC, 20mA power jack, no battery.” Several major dealer listings state 15 mA. Twenty milliamps is the manufacturer’s number and is what you should budget for on a power supply; the discrepancy appears to be a dealer-side transcription that has propagated. Either figure is trivially small for any modern isolated supply, so it has no practical consequence — but if you are reading spec sheets to build a power budget, use the manufacturer’s.
Published Dimensions Do Not Reconcile
Premier Guitar measured the enclosure at 4.5″ x 3.75″ x 1.25″ — roughly 114 x 95 x 32 mm. Guitar.com’s spec block lists 60 x 110 x 55 mm. Those describe different objects unless the second figure is measured on a different axis order and includes the knobs and jacks. Keeley does not publish enclosure dimensions on the product page at all. If board space is tight, measure against the Premier Guitar figure and add clearance for the top-mounted jacks and the oversized knobs.
A Typo Worth Knowing About
Guitar.com’s review text states the active EQ offers “+/- 20dB at 100Hz and 10Hz.” The second figure is a typo for 10 kHz — as the same paragraph and every other source, including Keeley’s own copy, confirm. A 10 Hz EQ band would be entirely inaudible. It is a small thing, but it has been copied into secondhand write-ups.
Bass Compatibility Is a Manufacturer Claim, Not a Reviewed Result
Keeley’s feature bullets include “Great for guitar AND bass!” That is a plausible claim — the low band is centred at 100 Hz, which is where a bass fundamental lives, and a fuzz with real bass authority is unusual — but neither of the two major reviews consulted for this article tested it on bass. Treat it as a well-motivated design intent rather than an independently verified capability.
Tone Recipes
1. The Console Muff
Level 1 o’clock · Fuzz 2 o’clock · Bass 2 o’clock · Treble 11 o’clock · Bias fully counter-clockwise
The starting point, and the setting closest to what most players expect a fuzz to sound like. Bias hard left gives maximum sustain and the fattest square-wave character; the modest bass boost puts weight underneath it and the slight treble cut takes the fizz off the top. Premier Guitar described the equivalent territory as “confrontational but controlled” and “Muff-like in character, but with more definition than the average Pi.” Use this as your reference before you start exploring.
2. Twenty Decibels of Bad Idea
Level 11 o’clock · Fuzz 3 o’clock · Bass fully clockwise · Treble 10 o’clock · Bias 9 o’clock
The reason to own the pedal. Full bass boost through a cranked fuzz is a genuinely destructive sound — the kind of doom-adjacent, room-moving low end that no passive-tone fuzz can produce. Drop Level to compensate for the enormous gain in output energy or you will slam the front of your amp into a completely different kind of distortion. Best on a bridge humbucker into a clean, high-headroom amp; a small combo will simply fold.
3. The Accidental Octave
Level 1 o’clock · Fuzz 4 o’clock · Bass 10 o’clock · Treble fully clockwise · Bias 1 o’clock
Chasing the effect Guitar.com identified — with the 10 kHz band pushed to its ceiling, the upper harmonics the fuzz generates become loud enough to read as an octave-up ghost note, complete with “beeps and squeals.” Play above the twelfth fret on the neck pickup for the cleanest version of the effect. Roll bass off to keep it from getting muddy underneath. This is a lead sound, not a rhythm sound.
4. Velcro Decay
Level 2 o’clock · Fuzz 2 o’clock · Bass noon · Treble noon · Bias fully clockwise
The starved setting. Notes stutter and collapse rather than sustaining; chords turn into ripping fabric. Level goes up because starving the circuit costs output. This is a texture, not a workhorse — but it is a texture the pedal produces on a knob rather than requiring a second box, which is the whole argument for the Bias control.
5. Tone Bender Homage
Level 1 o’clock · Fuzz 3 o’clock · Bass 10 o’clock · Treble 1 o’clock · Bias 10 o’clock
Rolling the bass back and pushing treble slightly forward gets you into the mid-forward, slightly nasal, thin-but-cutting British lead territory the name gestures at. Premier Guitar confirmed the pedal can reach “quirky and authentic late-’60s or early-’70s sounds.” A neck humbucker and a cranked Marshall-voiced amp complete the picture. Do not expect an exact MkII replica — expect a convincing dialect of the same language.
6. Bloom and Explode
Level noon · Fuzz fully clockwise · Bass 1 o’clock · Treble 1 o’clock · Bias 8 o’clock
Named for Robert Keeley’s own description of what an ideal fuzz should do: “You have to get it to explode and bloom.” Maximum fuzz with both EQ bands lifted and bias set fat. The note attack detonates and then swells. Works best with the guitar volume at 8 or 9 so that you can ride the dynamics back into something playable.
7. Sit-In-The-Mix Rhythm Fuzz
Level 1 o’clock · Fuzz 11 o’clock · Bass 10 o’clock · Treble 10 o’clock · Bias 11 o’clock
The setting that explains Elliot Easton’s studio board. Low fuzz, both EQ bands cut slightly to scoop the pedal out of the frequency ranges where vocals and cymbals live, bias in the middle. The result is a controlled, dense rhythm texture that occupies a narrow slot instead of swallowing the arrangement. Nearly every other fuzz on the market can only get here by turning down.
All settings assume both EQ knobs start at noon (flat) unless stated. Clock positions run from 7 o’clock fully counter-clockwise to 5 o’clock fully clockwise.
How It Compares
Versus the Big Muff Family
The Big Muff Pi and its variants — the Ram’s Head, the Triangle, the Green Russian — are four-transistor circuits with a passive mid-scooped tone stack. That scoop is their signature and their limitation: a Muff sounds enormous alone and frequently disappears in a band. The Fuzz Bender’s active EQ means you can build a Muff-like weight and then put the mids back, which is precisely the problem Muff owners spend years solving with EQ pedals and amp settings.
Versus the Fuzz Face Lineage
A two-transistor Fuzz Face is the opposite philosophy: minimum controls, maximum interaction with the guitar’s volume pot and the amp’s input stage. It cleans up beautifully and does one thing superbly. The Fuzz Bender does not clean up to the same degree — the silicon stages hold their gain — but it goes places a Fuzz Face cannot reach at all. If you want the pedal to disappear into your hands, buy a Fuzz Face. If you want the pedal to be an instrument in its own right, this is the other choice.
Versus the ZVEX Fuzz Factory
The obvious comparison, because both have a bias-style control and both make chaotic noises. The Fuzz Factory is a five-knob germanium circuit built around instability as a feature — its Gate and Comp controls exist specifically to produce oscillation and self-generating noise. The Fuzz Bender is far more housebroken. It reaches the sputtering territory but it does not live there, and its EQ section is oriented toward making the pedal sit in a mix rather than tear one apart. Own both if you can; they are not substitutes.
Versus the Way Huge Swollen Pickle
The closest genuine competitor in concept. The Swollen Pickle Jumbo Fuzz MkII is also a five-knob, oversized-format, deeply-adjustable Muff derivative, with Filter, Scoop and Crunch controls plus two internal trimmers. The distinction is that the Pickle’s tone shaping is subtractive and topological — you are reshaping a Muff’s own scoop — while the Fuzz Bender’s is additive and console-style. The Pickle also biases toward heavier, sludgier territory; the Fuzz Bender covers more ground toward the vintage British end.
Versus the Boss FZ-1W
The Boss FZ-1W Fuzz is a Waza Craft two-mode design offering a vintage germanium-flavoured voice and a modern high-gain voice via a switch. It is smaller, cheaper to power, built like a tank and considerably simpler to use. If your requirement is “one good fuzz sound and one aggressive fuzz sound, reliably, every night,” the Boss wins on practicality. The Keeley wins the moment you need a fuzz sound nobody else has.
Versus the JHS 3 Series Fuzz
The JHS 3 Series Fuzz occupies the budget end of the same shelf — three knobs, one job, a fraction of the price. Useful reference point for a buyer deciding whether the Fuzz Bender’s control set is worth the extra outlay. If you have never owned a fuzz, start cheaper. If you have owned three and none of them stayed on the board, the Fuzz Bender’s flexibility is the argument.
Custom Shop and Limited Editions
Keeley has issued the Fuzz Bender in several limited finishes, all built on the same circuit. They are cosmetic variants, not tonal ones — worth knowing about for collectors and for anyone trying to identify a secondhand unit.
- 20 for 20 Custom Shop Limited Edition (2020) — two colourways, Silver Rocket (matte clear coat over raw metal, black graphics) and Slime Green (gloss green with pink, purple and blue graphics), each limited to twenty units and carrying the 20 for 20 Keeley Custom Shop insignia. Shipping began 13 May 2020, delayed by the pandemic. Now in Keeley’s Archive category. Priced at the standard $149.
- Ghost Prism Custom Shop Edition — a holographic metallic finish limited to 45 units at $179. Guitar Pedal X’s Stefan Karlsson, who secured one, called it “the Platinum equivalent of precious metals” and “one of the most ‘bling’ pedals I’ve ever come across,” noting they sold out very quickly. He also confirmed it is a reverse-board build, meaning the transistors are not visible for identification without disassembly.
- ‘Tuxedo’ Custom Shop Edition — the black-and-white variant, and the version documented on Elliot Easton’s studio board.
- Keeley Army Custom Shop Limited Edition — a further limited finish in the same series.
None of these commands anything like the aftermarket premium that limited-run fuzz pedals sometimes attract, but the low unit counts on the 20 for 20 and Ghost Prism editions make them genuinely scarce.
Buying Guide
Who Should Buy One
The Fuzz Bender is for the player who has already tried the classics and found them insufficiently adjustable. If you own a Muff and wish it had mids, or you own a Fuzz Face and wish it had more range, or you have a fuzz sitting in a drawer because it never fit the band, this pedal is designed precisely for your problem.
It is also a strong choice for studio and session work, which is where the documented user base is concentrated. Every one of the Tier 1 players above is someone whose job involves fitting a guitar into a finished production rather than filling a room with one.
Who Should Not
If you want to plug in and immediately have the sound, buy something simpler. Five interactive knobs with two of them capable of 20 dB swings is a lot of surface area, and there are plenty of settings on this pedal that sound bad. Premier Guitar’s own framing — “a fairly complex control set” — is fair warning. A player who dislikes tinkering will get less from a Fuzz Bender than from a well-chosen three-knob box.
If your board space is measured in millimetres, the landscape enclosure is genuinely large and the top-mounted jacks add depth. Guitar Pedal X’s Karlsson, who liked the pedal enough to buy the rare edition, was still openly critical of the format: he called it “my least favourite format of Medium enclosure” and said he would have preferred the vertical orientation used on the Keeley D&M Drive.
New Versus Used
The Fuzz Bender is still in production at $149 and the circuit has not been revised. Secondhand units typically appear from around $126, which is a thin enough discount that buying new for the warranty and the current-production build is usually the better call unless you are specifically hunting a custom shop finish.
Availability Note
Keeley’s product page currently carries a shipping restriction: “Due to new GPSR regulations, we currently ship this product within the USA.” GPSR is the EU’s General Product Safety Regulation, which came into force in December 2024 and imposes compliance obligations on manufacturers selling into the European market. Buyers outside the United States should expect to source through a local dealer or distributor rather than direct from Keeley.
Living With It
Power
There is no battery compartment. The pedal requires an external 9V DC centre-negative supply and draws 20 mA. Use an isolated output — fuzz circuits are sensitive to supply noise and a hybrid design with silicon gain stages will happily amplify whatever hum arrives at its power pin.
Placement in the Chain
Conventional wisdom puts fuzz first, before everything, so that it sees the guitar’s pickups directly. That is sound advice here too — the germanium stage’s input impedance interacts with pickup output, and a buffer in front will change the feel. Practically, that means putting the Fuzz Bender ahead of a Cry Baby is worth trying even though the traditional order is wah-first; the two arrangements sound meaningfully different and neither is wrong.
Because the pedal is true bypass, it does not load your signal when switched off — but that also means a long cable run into it will lose top end. If you have a buffered pedal such as a Keeley Compressor Plus on the board, experiment with whether it sits better before or after.
Stacking
The Fuzz Bender takes a boost well after it, where the extra level pushes the amp rather than the fuzz. A clean boost like the Keeley Katana placed downstream turns the Tone Bender Homage recipe into a genuinely convincing lead voice. Placing a Tube Screamer in front, by contrast, tightens and compresses the fuzz’s input in a way that is either exactly what you want or completely wrong depending on the song — the mid-hump of a TS-style circuit fights the Fuzz Bender’s own EQ for the same real estate.
Knob Protection
Given Premier Guitar’s warning about the oversized knobs, players who gig hard may want to consider the physical layout of the board carefully — leave clearance in front of the footswitch, and if you are the sort of player who stomps rather than presses, keep the pedal away from the edge where your foot arrives at an angle.
Frequently Asked Questions
Is the Keeley Fuzz Bender a Tone Bender clone?
No. It uses the three-transistor architecture associated with the Tone Bender MkII but changes the two things that most define that circuit: it replaces the all-germanium array with two silicon transistors plus one vintage Japanese germanium device, and it adds an active gyrator EQ stage that no vintage Tone Bender has. Premier Guitar described it as adding “significant and original twists to the vintage 3-transistor Tone Bender template.” It will get you into that tonal neighbourhood, but it is not a reissue and does not claim to be.
What does the Bias knob actually do?
It varies how hot or cold the transistors are biased, which changes sustain, compression and the fundamental shape of the distortion. Fully counter-clockwise gives the fattest, most sustaining square-wave voice; rotating clockwise progressively starves the circuit toward spitty, gated, “velcro” decay. It is not a noise gate and it is not simply a novelty control — Premier Guitar found it ranged “from thick, warm, and creamy to bright, spitty, splatty, and glitchy.”
Does the Fuzz Bender take a 9V battery?
No. Keeley’s specification is explicit: “9 volt DC, 20mA power jack, no battery.” You need an external supply. This is unusual for a fuzz — many players like batteries in fuzz circuits for the supposed sag — but it is a deliberate design decision here.
Is the Fuzz Bender still in production?
Yes. As of the most recent update to Keeley’s product page in August 2026 it is listed in the Distortion, Drive, Boost & Fuzz category with the tag “Active,” priced at $149.00, with stock available direct. Only the limited custom shop editions have moved to Keeley’s Archive category.
Which famous guitarists use the Keeley Fuzz Bender?
The best-documented user is Elliot Easton of The Cars, who has the ‘Tuxedo’ Custom Shop Edition on a studio board built for him by Keeley Electronics staff. Carrie Brownstein of Sleater-Kinney has been photographed with one, and Sarah Lipstate of Noveller announced receiving one for her board. Josh Jenkinson of Inhaler, Andrew Aged, Lars Lillo-Stenberg of deLillos, Gürhan Öğütücü of Adamlar and Jakob Betke of Milliarden are documented on photo or video evidence. Dan Auerbach and Gary Clark Jr. are frequently associated with the pedal online, but that traces to a Premier Guitar sentence describing the tonal territory the pedal can reach — neither is a documented user.
Can I use the Fuzz Bender with a bass guitar?
Keeley’s own feature list says “Great for guitar AND bass!” and the design supports the claim — the Bass band is centred at 100 Hz, right where a bass fundamental lives, and 20 dB of boost there is considerable authority. That said, neither of the two major published reviews tested it on bass, so treat it as manufacturer intent rather than independently verified performance.
How does it compare to a Big Muff?
A Big Muff has a passive, mid-scooped tone stack that gives it its enormous solo sound and its tendency to vanish in a band mix. The Fuzz Bender can build comparable weight — Premier Guitar called its fattest setting “Muff-like in character, but with more definition than the average Pi” — and then use the active EQ to put mids back and carve out space. If your complaint about Muffs is that they disappear, this is the direct answer.
Is the Fuzz Bender true bypass?
Yes. Keeley’s feature list states “simple in/out top mounted jacks, true bypass.” That means no tone loading when disengaged, but also no buffering, so long cable runs into the pedal will cost you high end.
What is the difference between the Custom Shop editions and the standard model?
Finish only. The 20 for 20 (Silver Rocket and Slime Green, twenty units each), Ghost Prism (45 units, holographic metallic, $179), ‘Tuxedo’ and Keeley Army editions all use the same circuit as the standard white-and-orange unit. They are collector items and cosmetic variants, not tonal upgrades.
Is it worth $149?
Both major published reviews said yes emphatically. Guitar.com scored it 9/10 and called it “a sensational, versatile fuzz which will appeal to connoisseurs and novices alike.” Premier Guitar concluded that “the EQ stage and bias knob are genuinely transformative controls” and that the pedal “strives for originality rather than simple vintage emulation or oddball extremes.” The counter-argument is complexity: five interactive controls will frustrate a player who wants one great sound immediately.
The Verdict
The Keeley Fuzz Bender is a fuzz pedal built by somebody who thought carefully about why fuzz pedals so often fail in practice. They fail because they sound magnificent alone and shapeless in context; because their one tone control only subtracts; because you get the manufacturer’s idea of a good fuzz and no meaningful ability to move it. All three of those problems get addressed here, and the solutions are unusual enough that seven years after launch the pedal still does not have an obvious competitor.
What it lacks is a famous owner to sell it. There is no Fuzz Bender riff that everybody knows. Its documented users are working guitarists — a new wave veteran doing studio dates, an indie-rock guitarist holding down the low end of a bass-less band, an experimental composer, a session player, a handful of European rock guitarists. That is a fair reflection of the pedal’s character. It is a tool, and it rewards the kind of player who thinks of a fuzz as something to be shaped rather than something to be endured.
If you have a drawer of fuzz pedals that never quite worked, the odds are decent that the problem was not the fuzz. It was the missing EQ.