Most amp-in-a-box pedals are named after an amplifier. The Keeley 1962x is named after a catalogue number.
That distinction matters more than it sounds, and it is the first thing almost everybody gets wrong about this pedal. There was no legendary amplifier built in the year 1962. What there was, from roughly 1964 onward, was a Marshall combo whose factory model designation happened to be 1962 — a 2×12 open-back cabinet with a JTM45 chassis bolted into it, four inputs, tremolo, KT66 output valves and a GZ34 rectifier. It sold for about a third less than a Vox AC30 and half what a Fender Bassman combo cost. It was Marshall’s first combo amplifier. And when Eric Clapton bought one on credit in November 1965, having abandoned his half-stack in Greece, it stopped being a model number and became a legend.
Robert Keeley named a pedal after it. Then, because Robert Keeley is constitutionally incapable of leaving a finished circuit alone, he named a second pedal after the first pedal, added a letter, and put a switch inside it that pretends to swap the power valves.
This is the story of the Keeley 1962x 2-Mode Limited British Overdrive — a pedal that is now discontinued, that never had a proper magazine review cycle, that was built in batches whenever parts were available, and that got the single best endorsement quote in the entire Keeley artist roster from a man who played guitar in Prince’s other band.
The Amplifier Behind the Name
The Marshall Bluesbreaker is not one amp but two: Models 1961 and 1962, produced from around 1964–65 until 1972. The 1961 had four 10-inch speakers; the 1962 had two 12s. Both were essentially the JTM45 circuit — itself a modified Fender Bassman topology — dropped into an open-backed combo cabinet with tremolo added. Marshall biographer Michael Doyle traces the 1961 to the lead-channel JTM45 (Model 2245) and the 1962 to the bass version (Model 1986).
According to Robb Lawrence’s history of the Les Paul, Jim Marshall initially handed Clapton a 4×10 Model 1961, which was soon swapped for the 2×12 Model 1962. Clapton paired it with his 1960 Gibson Les Paul Standard and recorded Blues Breakers with Eric Clapton — the “Beano” album — released in July 1966.
The technical reason that record sounds the way it does is unglamorous: the amp was not very loud. A typical Bluesbreaker put out around 35 watts. It broke up at volumes a 100-watt stack would not reach until the walls came down. Clapton reportedly told producer Mike Vernon’s engineer to mic the amp from across the room, because he intended to play it flat out. The KT66 output valves gave what amp historian Aspen Pittman describes as a round, bell-like tone with a soft distortion character. The open back thinned the low end and sharpened the top compared to a closed 4×12 — which is precisely why it flatters a Les Paul.
Marshall discontinued the model in 1972. By 2011, Vintage Guitar ranked a clean 1966–67 Bluesbreaker seventh on its list of the twenty-five most valuable amplifiers ever made, with honest examples fetching between US$8,300 and $10,000. Which is the entire commercial logic behind every Bluesbreaker-flavoured pedal ever built, this one included.
A Necessary Warning About the Word “Bluesbreaker”
In 1991 Marshall released a pedal called the Bluesbreaker, intended to emulate the combo. It is a completely different animal from the amp — a low-gain, transparent, slightly compressed op-amp overdrive whose circuit became one of the most-copied designs in the boutique world. The Analog Man King of Tone and the JHS Morning Glory both descend from it. John Mayer’s use of an original on Continuum sent used prices past $1,000 and prompted a Marshall reissue in 2023.
So “Bluesbreaker” means two entirely different sounds depending on who is talking. The Keeley 1962 references the amplifier — heavy, cutting, mid-forward, layered. It does not sound like a Marshall Bluesbreaker pedal, and anyone shopping for a King of Tone alternative on the strength of the name is going to be surprised. We will come back to this in the comparisons.
What Robert Keeley Actually Built
Keeley’s own product copy for the original 1962 British Overdrive is unusually specific about the architecture, and it is worth reading closely:
“Now take the incredible tone of a blues breaker and wrap a Keeley Katana circuit around both sides of it and you have the Keeley 1962.”
And, on the layering: “We’ve taken one of the most popular boosters out there, the Katana, and split it in half. Using both JFETs like valves in a British amp, we create pre-amp and output tube distortions characteristics.”
That is the design in one sentence. Take the Keeley Katana Clean Boost — Robert Keeley’s first-ever design for his own company, a cascading Class A JFET booster — cut its gain stages in two, and place one half in front of the core clipping section and the other half behind it. The front half behaves like a valve preamp stage. The back half behaves like an output section being pushed. What you get is not a single clipping event but a stack of them, which is why the pedal has a saturated, singing sustain that a one-stage overdrive cannot produce at the same gain setting.
Keeley is careful not to publish what sits between those two JFET halves. Reviewers have filled in the gap themselves — the Squid Guitar Inc. review of the original 1962 asserts flatly that Keeley “take[s] the popular Marshall Bluesbreaker pedal circuit and wrap[s] it in the JFETs from a Keeley Katana boost pedal.” That is a plausible inference from listening, and it is repeated widely, but it is an inference, not a manufacturer statement. Keeley has never confirmed the core topology. We are flagging it because a lot of forum discussion treats it as established fact.
What Keeley does confirm: surface-mount JFET transistors placed and soldered by hand, a deliberately low-noise op-amp chosen for the signal path, and assembly in Edmond, Oklahoma. The same review that guessed at the topology also nailed the practical description — the 1962 feels less like one overdrive and more like two overdrives already switched on together.
The “x”: Two Power Sections, One Toggle
The 1962x adds one small toggle switch to the standard 1962, and that switch is the entire reason the pedal exists. It is labelled KT66 and KT88, after two of the most recognisable British-made beam tetrodes.
Keeley’s own description of what the toggle does is refreshingly literal:
- KT66 mode — “you will get the same performance and gain range you get in the standard 1962, from mild light breakup all the way to full saturation.” This is the stock pedal. Softer, rounder, more compressed, more period-correct. It matches the valve the real Bluesbreaker actually shipped with.
- KT88 mode — “a MOSFET transistor is inserted in the clipping stage to produce a higher output, and a more forceful, focused and meatier sound.” Keeley adds that it “definitely steps the presence up a notch and acts terrifically to light up the front end of a classic tube amp.”
Two things are worth being precise about here, because marketing language for switchable-tube pedals is usually vaguer than this.
First, no valve is being emulated in any modelling sense. A MOSFET is being switched into the clipping stage. MOSFETs clip differently from silicon diodes or LEDs — a softer knee, more even-order content, and crucially a higher forward voltage, which is where the extra output and headroom come from. Keeley is describing a real circuit change with a real audible consequence, and choosing a valve name as shorthand for its character. That is honest shorthand, but it is shorthand.
Second, the KT88 is a genuinely different valve from the KT66 in the real world — bigger, stiffer, higher-powered, more associated with hi-fi and with Marshall Major-era brute force than with a 1966 blues combo. So the toggle is not “vintage versus more vintage.” It is “the amp that made the record” versus “what if that amp had considerably more grip.” Players who buy the 1962x expecting two flavours of Beano tone tend to find they use one setting almost exclusively.
Specifications
Famous Players: One Great Story, Independently Verified
This is a pedal with a thin roster and one absolutely outstanding entry. We would rather report that accurately than pad it.
Jesse Johnson — The Time, Prince, D’Angelo & The Vanguard
Jesse Johnson is the original guitarist of The Time, the band Prince assembled and largely wrote and produced for in the early 1980s, and later a member of D’Angelo & The Vanguard. He is on Keeley’s official artist roster, and on his own artist page at robertkeeley.com he says this, verbatim:
“My favorite Keeley pedals hands down would be 1962x (KT88 setting). If you listen to my guitar on The Time’s 2017 Grammy performance, that’s all 1962x blazing thru a Metropoulos Metroplex. Metallica’s guitarist Kirk Hammett asked if I was using delays, and answered nope just Keeley 1962x.”
The performance is easy to place. On 12 February 2017, at the 59th Grammy Awards, The Time opened the Prince tribute segment with “Jungle Love” and “The Bird” before Bruno Mars closed it with “Let’s Go Crazy.” So we have a named player, a named setting on the pedal, a named amplifier, a specific broadcast performance that anyone can go and listen to, and a corroborating anecdote about a fellow professional mishearing the pedal’s sustain as delay.
That last detail is the most useful piece of tone information in the whole quote. Kirk Hammett hearing delay where there was none is exactly what a two-stage JFET sandwich in MOSFET mode does: the layered gain produces bloom and decay that reads as ambience. It is the same illusion that makes stacked overdrives sound “bigger” than a single high-gain pedal at matched volume.
The amp matters too. A Metropoulos Metroplex is a boutique Marshall-derived head. Johnson was not using the 1962x to fake a Marshall into a clean amp; he was using it to light up an already-British front end — which, per Keeley’s own copy, is precisely what KT88 mode is for.
Rick Graham
The British instrumental guitarist and educator Rick Graham has been photographed with a 1962x on his pedalboard in an Instagram post. That is a board sighting rather than a documented tonal statement, and we are listing it as exactly that.
The Names That Are Not On This List — And Why
Eric Clapton never used a Keeley 1962x, and nothing on this page implies otherwise. Clapton used the amplifier the pedal is named after, in 1965–66, roughly half a century before the pedal existed. The 1962x is an attempt to bottle a sound he made; it is not gear he endorsed, owned or plugged in. Any listing or article that puts Clapton in the “artists who use this pedal” column is confusing the tone with the tool. The same goes for every other 1960s British blues-boom player whose name gets attached to Bluesbreaker-style pedals — Peter Green and, later, Gary Moore included.
John Mayer is on Keeley’s artist roster, but not for this pedal. Keeley’s own 1962x product page name-checks him: “Check out John Mayer’s use of the Klon and a Bluesbreaker pedal. Now imagine that only better.” Read carefully, that is a pairing suggestion — Keeley is pointing at a famous stacking combination as an argument for putting a Klon in front of the 1962x. It is not a claim that Mayer plays a 1962x, and the “Bluesbreaker pedal” in that sentence is the Marshall pedal, not this one. It gets misquoted constantly.
Kirk Hammett appears in the Jesse Johnson quote as a bystander, not a user. He asked a question backstage. That is the whole of his involvement.
Tone Recipes and Settings
“Beano” — the reason the pedal exists
Mode: KT66. Gain: 2 o’clock. Treble: 11 o’clock. Boost: 1 o’clock.
Bridge humbucker on a Les Paul, neck pickup for the fat stuff, amp set just below its own breakup point. The Treble knob is the critical control here: the real 1962 combo was an open-back cabinet, so backing the treble off slightly and letting the mids carry gets you closer than a scooped setting ever will. Roll the guitar volume back to 7 and the pedal cleans up into a woody rhythm sound.
Grammy — the Jesse Johnson lead
Mode: KT88. Gain: 3 o’clock. Treble: 1 o’clock. Boost: 2 o’clock.
Into an already-British-voiced amp, not a clean Fender. This is the setting where the layered gain reads as sustain-plus-ambience, and where a professional guitarist mistook it for a delay. Single notes bloom rather than decay linearly. Keep the amp’s own gain low; you want the pedal doing the work, not a mush of two saturated preamps.
Strat fattener
Mode: KT66. Gain: 12 o’clock. Treble: 10 o’clock. Boost: 1 o’clock.
The 1962 family has a slightly pushed midrange, which is exactly the thing a Stratocaster lacks. Reviewers who tried it with single coils consistently reported that it thickened them without turning them into a humbucker impression. Position 4 with these settings is a genuinely good blues-rock voice.
Rhythm crunch
Mode: KT66. Gain: 9 o’clock. Treble: 12 o’clock. Boost: 12 o’clock.
Because the pedal is essentially pre-stacked, low-gain settings are not its natural habitat — chordal clarity is not its strong suit compared with a transparent overdrive. But at 9 o’clock with the amp contributing a little of its own dirt, it does a convincing open-chord crunch that responds hard to pick attack.
Klon in front
Mode: KT88. Gain: 1 o’clock. Treble: 12 o’clock. Boost: 12 o’clock, with a Klon Centaur or a klone such as the Wampler Tumnus ahead of it at unity gain and treble around 1 o’clock.
This is Keeley’s own recommendation — the product page says the pairing is “near perfect for leads” — and it works because the Klon’s mid-hump and clean headroom tighten the low end that a stacked JFET drive can otherwise let sprawl. One reviewer who tried it with a J. Rockett Archer preferred the 1962 on its own, so treat this as a lead voice to switch to rather than a permanent setting.
Three knobs — Gain, Treble, Boost — plus the mode toggle. Gain sets saturation and sustain. Treble extends the highs or takes the edge off. Boost is the output level. Note that the standard 1962 is often described in reviews as having gain, tone and volume; these are the same three functions under different panel labels, so settings translate directly between the two pedals.
All settings below are clock positions with the pedal into a clean-ish valve amp, humbuckers unless stated.
How It Compares
vs a Marshall-Bluesbreaker-derived pedal (King of Tone, Morning Glory). Not competitors, despite the shared word. The King of Tone and JHS Morning Glory are transparent, low-gain, amp-preserving drives that add grit without rewriting your EQ. The 1962x replaces your amp’s voice with its own. If you want your rig plus a bit, buy those. If you want a different rig, buy this.
vs the Wampler Plexi-Drive Deluxe. The closest philosophical match in this guide — both are Marshall-in-a-box designs with more gain on tap than the amps they reference. The Plexi-Drive points at a later, brighter, harder Marshall with a full EQ section and a separate boost. The 1962x points at the earlier, rounder, KT66-era combo and gives you three knobs. The Wampler is more flexible; the Keeley has a stronger single point of view.
vs the Wampler Pantheon Deluxe. This is the one to be careful with, because the Pantheon is built on the Marshall Bluesbreaker pedal lineage. Same word on the box, opposite end of the gain spectrum. The Pantheon is the transparent one; the Keeley is the amp one.
vs a Tube Screamer. Keeley’s own copy is blunt: “This ain’t a tube screamer! But it sure as heck goes well with one!” A TS is a mid-hump and a gain cut used to focus an amp. The 1962x supplies the whole distorted voice. Stacking a Screamer into it for solos is a legitimate and long-established move.
vs other Keeley drives. The D&M Drive is a two-in-one boost-and-drive collaboration aimed at transparency and stacking flexibility; the 1962x is a single fixed voice. Keeley’s own suggestion in the product copy is to run the mid-focused Red Dirt into the 1962 as a two-stage lead system. If you are building a Keeley front end, a Compressor Plus behind it evens out the sustain without adding hiss.
Buying Guide: A Discontinued Pedal in 2026
The 1962x is listed in the Archive category on Keeley’s own site, with the Archive tag. So is the standard 1962. Both are out of production. Keeley never pretended otherwise about the x — the original announcement described it as “a limited version of our 1962, built in batches when we have the supply.”
That means the used market is the only market. A few practical notes:
- Expect roughly US$190–$260 used, with clean boxed examples at the top of that range. Prices have been broadly stable rather than climbing, because the pedal never acquired a mythology the way the Marshall Bluesbreaker pedal did.
- Check which pedal you are actually buying. The 1962 and the 1962x look different — the x got a redesigned graphic packed with Bluesbreaker design cues — but listings routinely use the names interchangeably. If there is no toggle switch between the knobs, it is a standard 1962, and it should cost less.
- The toggle is the fragile part. It is a small switch on a pedal that lived under a foot. Ask the seller to confirm it clicks positively into both positions and that both modes are audibly different.
- Battery snap. The pedal accepts a 9V battery, which means there is a snap connector inside that can fatigue. Not a dealbreaker, but worth asking about on an older unit.
- Keeley still runs a repair department. An Archive-status pedal is not an orphan; the company maintains a repair ticket system. That is a meaningful difference from buying a discontinued pedal from a defunct builder.
Living With It
Three things to know before you commit board space.
It is quiet. Multiple hands-on reports single this out — for a pedal running two JFET stages plus a clipping section, the noise floor is low. Keeley credits the deliberately chosen low-noise op-amp. This matters because pre-stacked drives are usually hissy.
It is not versatile, and that is the point. The three controls will fit the pedal to your rig; they will not turn it into a different pedal. If you want one drive that covers everything from edge-of-breakup to modern high gain, this is not it. If you want one very specific 1966 sound available on a footswitch, it is excellent at that.
9V only. Keeley specifies a 9V battery or a 9V DC centre-negative supply. There is no 18V mode. Do not go looking for extra headroom by overvolting it.
It cleans up, but not infinitely. Because you are rolling back the guitar volume into a stacked gain structure, the cleanup is real but less dramatic than with a single-stage overdrive. Reviewers describe usable rhythm tones from the guitar’s volume control rather than a full clean.
Frequently Asked Questions
Is the Keeley 1962x still in production?
No. Keeley lists it under SKU 1962x in the Archive category with the Archive tag, as it does the standard 1962. It was always a limited run — Keeley’s own announcement described it as built in batches when parts supply allowed. The used market is the only source.
What is the difference between the Keeley 1962 and the 1962x?
The x adds a KT66/KT88 toggle switch and a redesigned graphic. In KT66 position it is, by Keeley’s own statement, identical in performance and gain range to the standard 1962. In KT88 position a MOSFET transistor is switched into the clipping stage for higher output, more presence and a more focused, meatier sound. Everything else — the three controls, the JFET architecture, the enclosure size — is shared.
Does the KT88 mode actually contain a KT88 valve?
No. There is no valve of any kind in the pedal. The names are shorthand for two clipping characters: the stock silicon-era voice of the standard 1962, and a MOSFET-clipped voice with more output and presence. Keeley is explicit about the MOSFET in its own copy, so this is descriptive marketing rather than a false claim — but it is worth stating plainly.
Is the 1962x the same as a Marshall Bluesbreaker pedal?
No, and this is the most common confusion around it. The Marshall Bluesbreaker pedal (1991) is a low-gain, transparent overdrive whose circuit spawned the King of Tone, Morning Glory and Wampler Pantheon family. The Keeley 1962 series is voiced after the Bluesbreaker amplifier — Marshall’s Model 1962 combo — and is a much heavier, more saturated amp-in-a-box. Keeley has never published the core topology, so claims that the 1962 contains a Bluesbreaker-pedal clipping section are reviewer inference, not manufacturer statement.
Did Eric Clapton use a Keeley 1962x?
No. Clapton used the Marshall Model 1962 combo the pedal is named after, on the 1966 “Beano” album with John Mayall’s Bluesbreakers. The Keeley pedal is a modern attempt to recreate that sound and postdates those recordings by around half a century. No 1960s British blues player used one, because none existed.
Which famous players actually use the 1962x?
Jesse Johnson of The Time — also a Prince associate and a member of D’Angelo & The Vanguard — names it as his favourite Keeley pedal on his official Keeley artist page, specifically in the KT88 setting, and says his guitar sound on The Time’s 2017 Grammy Prince tribute was the 1962x through a Metropoulos Metroplex. Rick Graham has been photographed with one on his board. That is the extent of the reliably documented roster; it is short, but the Johnson entry is unusually detailed and specific.
What amp should I use it with?
Anything with clean headroom will work, but the pedal was designed to light up the front end of a valve amp, and Keeley says as much about KT88 mode specifically. Jesse Johnson ran it into a Metropoulos Metroplex — a boutique Marshall-derived head. Into a very clean, very scooped solid-state amp the pedal will still make its sound, but you lose the interaction that gives it its bloom.
Should I put a Klon in front of it or after it?
In front. Keeley’s own recommendation is a Klon or klone into the 1962x, which is the arrangement the product page calls “near perfect for leads.” The Klon’s clean headroom and mid-hump tighten the stacked JFET low end. Running it after the 1962x works as a volume lift but does less for the tone.
Does it work with single-coil guitars?
Yes, and better than its reputation suggests. Its slightly pushed midrange compensates for the scooped voice of a Stratocaster, fattening single coils without disguising them. Reviewers testing the original 1962 rated it among the better overdrives they had heard on a Strat. Back the Treble control off a little compared to your humbucker settings.
Is it true bypass?
Keeley does not state the switching type on the archived 1962x product page, and we are not going to assume it. Keeley’s practice across this era of pedals was overwhelmingly true bypass, but on a discontinued unit the right move is to ask the seller or check the pedal in a chain rather than take a spec sheet’s silence as confirmation.