Larry Thomas knew how much Alexander Dumble revered Leo Fender and his designs. Thomas took Dumble to visit Leo’s office, where this photo was taken. It hasn’t been changed since Leo’s last day at work.
Howard “Alexander” Dumble was about as close to a guitar mystic as you can get. He was an eccentric recluse as well known for the mythology surrounding his creations as for the amplifiers themselves. The list of players who have relied on his amps carves a through line of the history of modern electric guitar styles. Eric Clapton, Carlos Santana, Stevie Ray Vaughan, Jackson Browne, Robben Ford, Eric Johnson, John Mayer, Sonny Landreth, Joe Bonamassa, and dozens of other A-listers found their sound through a Dumble amp. On January 17th, Dumble passed away at his home in Turlock, California.
Not many people really knew Dumble on a close personal level. Considering his aversion to interviews and media, he could have probably passed through any Guitar Center relatively unnoticed. But Larry Thomas, former CEO of Fender and Guitar Center,was a close friend. “The definition of a genius is someone who knows more about a subject than anyone else. His genius was being able to turn what he heard in your playing into an amp that made it better.” And that skill goes far beyond the schematic.
Kenny Wayne Shepherd remembers when he brought an amp to the workshop for repair: “After popping open the circuit he would jump around with a multimeter and would almost instantly know how to fix it. There are probably other amp techs that would understand those readings, but Dumble was the only one in the world who knew what those readings should be.”
“I think his greatest satisfaction came from creating technology that translated into art by the individual artists he specifically tweaked his designs for.” – Sonny Landreth
In the mid 1960s, while still a teenager, Dumble got a job designing amps for Mosrite. Semie Moseley was impressed by the talented youngster and proposed a partnership. “He offered to go in with me to build 10 amplifiers. He bought the parts and paid me $90 a week—for about four weeks, and then I had to work for free,” Dumble told Guitar Player in a 1985 interview. The Ventures were one of Mosrite’s biggest endorsees and caught wind of the new amps but declined to use them. Dumble said, “It was a little too much rock for them.” These piggyback amps might be the rarest Dumble creations of all and it’s believed that only one or two are still in existence. In the late-’60s, a lengthy tour playing bass for Canadian singer/songwriter Buffy Sainte-Marie (who was unaware at the time of his talent for creating amps) helped Dumble open his first workshop.
There was an ad-hoc audition process if a player wanted to commission a Dumble amplifier. In order to even get the opportunity to meet with the builder, a player would need a recommendation from someone in Dumble’s trusted circle. Then, if they were invited, the audition could be simply playing for him during a casual hang, or he might ask for a CD. “Alexander really only wanted to make amplifiers for the very best players in the world,” says Thomas. It didn’t seem like fame was a deciding factor either—Dumble would turn down requests from big-name players. “He treated his amps like they were his children,” says Bruce Forman. Back in 2019, Forman brought Dumble a 1966 Fender Vibrolux for his two most popular mods: RockFonicks and Ultra-Phonix. “He wanted them out there making music.”
Each amp Dumble created was carefully and painstakingly crafted to accentuate the best parts of the owner’s style.
Photos courtesy of Bruce Forman
Many times, the only real proof that an amp had been “Dumble-ized” would be a handwritten tag written by the man himself.
Those lucky enough to pass the “audition” and spend time with Dumble would often comment on his amazing touch on the instrument. During one of his visits to Dumble’s shop, Shepherd found himself on the receiving end of a subtle guitar lesson. “He would always ask permission to show me stuff,” remembers Shepherd. These gentle “lessons” would inevitably lead to impromptu jam sessions—some of which Shepherd recorded for his own benefit. “If I didn’t record those licks he showed me, I would have forgotten them 30 minutes later.”
The one guitarist who’s most synonymous with the sound of a Dumble is Robben Ford. For nearly 40 years, Ford has been the caretaker of an Overdrive Special that, in his hands, has become the benchmark for classic Dumble tones. His latest live album, Live at Yoshi’s ’96, became an unintentional tribute—not only are the tones visceral and huge, but the cover features a plain image of the most famous Overdrive Special around. Ford purchased the head for $1,200 when Dumble was set up at The Alley in North Hollywood. “Alexander told me that watching me play my early ’60s Fender Bassman inspired him to create the Overdrive Special,” remembers Ford. With the rise of Ford’s career in the ’80s and ’90s, word began to spread about Dumble’s builds—and his eccentricity. “One of the final tests Dumble would do on amps would be to remove the tubes and drop it out of a three-story window. If it worked after that he knew it was finished,” mentions Ford.
“He was a mystery, to all of us.”– Robben Ford
About 10 years after obtaining the first Overdrive Special, Ford put in an order for another one to keep in Europe. Originally, this was going to be a 50-watt model because Ford was looking for ways to keep the stage volume down, but that didn’t last long. “Turns out I was addicted to 100 watts in a live situation,” says Ford. “How do you get headroom and tone? Dumble.” Several years ago, Ford was going through a divorce, moving to Nashville, and was looking to sell the second ODS. Knowing Dumble’s general dislike of the secondhand market for his amps, Ford reached out and brought up the idea, offering to split the proceeds. “He made this amp. I’m just the salesman,” said Ford. After agreeing to a 60/40 split, Dumble connected Ford with a buyer, who would occasionally help Dumble acquire components for his builds. “Dumble told me not to send a check and just have his cut be a ‘credit’ with the new owner. He was a mystery, to all of us.”
His off-the-grid lifestyle forced Dumble to frequently look at alternate payment arrangements with clients. One of the early users of his amps was singer/songwriter Christopher Cross, who was brought in by Bonnie Raitt. Cross and Dumble decided on two KT88-loaded heads (a first for Dumble at the time) with matching 2x12 cabinets in orange suede for a clean sound and an Overdrive Special with a 4x12 cab for a lead sound. Naturally, Cross needed a way to switch between sounds easily. The solution was based around a pair of Japan-made Strats that were modified by Valley Arts. Each guitar only had a middle and bridge pickup and was outfitted with a heavy-duty switch—imagine the massive switches on the back of vintage Fender amps. An oversized cord went to a blue two-space rack unit that housed mechanical relays to control which amp was engaged. “I really couldn’t afford to mess around with pedals at that time,” says Cross. At the time, Dumble was living in a house owned by Jackson Browne and Cross headed up there to pay for the custom relay box. “When I asked him what I owed him, he handed me a torn-out page from a Sears catalog,” recalls Cross. Dumble had circled a washer and dryer unit and told Cross that if he bought those for him, they were square.
Ben Harper pulls no punches when it comes to his amps. This one was the eighth Dumble ever made! He got it from one of his early mentors, David Lindley. The head runs into two 12" Celestion speakers, one housed in a tweed Glasswerks cab and the other is in the green Dumble combo.
Along with the tweed Twins, Joe Bonamassa runs a pair of Dumble Overdrive Special combos. This silverface model was built in 1980 and has been retrofitted with Bonamassa’s signtuare Celestion 85-watt speaker. This one is 50-watts, which Joe Bonamassa prefers over their 100-watt big brothers.
Several companies tried to partner with Dumble to bring his amps to a larger market. “He created an entire industry that he didn’t participate in. Alexander never cashed in on that. He steadfastly had a code of conduct he lived by until the very end,” says Joe Bonamassa, who currently has a stash of four Overdrive Specials and a Fender Vibrolux with the UltraPhonix mod in his collection. According to Bonamassa, Dumble is “by far the most innovative circuit designer of all time,” and he attributes the boutique amp boom to Dumble’s work.
Probably the closest Dumble ever got to working with a larger company was when Thomas pitched the idea of Fender licensing one of his designs. The two had a lot in common and shared a deep love for Leo Fender and his designs. Early discussions revolved around doing a Dumble-approved modded Twin or Deluxe Reverb. Thomas also mentions that pedals were also a possibility. “I have a few of the [amp] prototypes,” says Thomas. “Simply put, one roadblock was we couldn’t really figure out how to pay him.” After spending a few years on the project, it ran out of steam. Thomas last saw Dumble in October when they met for dinner the night before he moved to Turlock. “He was in a really good space,” says Thomas.
“His amps were superheroes.” – Henry Kaiser
“His wish was that once he was gone there would be no more Dumble amplifiers,” says Ford. “Most people want to leave behind a legacy, but he didn’t want that.” Health issues prevented Dumble from doing much work over the last six months of his life, but a few projects really excited him. Slash had recently connected with him for a build, and he was in talks to make an amp for Keith Richards.
During our talk, Larry Thomas held up a framed turret board populated with the components of an old Fender 5E3 Deluxe circuit. It was a Christmas gift from his friend, Alexander Dumble. The solder joints were impeccable. Around back was an inscription describing how the Tru-Ohm resistors and Allen-Bradley capacitors had been carefully harvested from older amplifiers. Dumble’s handwriting—even carved in the back of a frame—is unmistakable. It was a work of art that he made for his friend celebrating their shared love of a particular old amp.
Alexander Dumble’s contributions—both direct and indirect—will stand alongside names like Leo Fender and Jim Marshall. For years to come his designs will be analyzed, discussed, and copied, much like his heroes. Even though many will never get past the market price for his creations, Dumble might have said it best back in ’85, “There are hundreds, perhaps thousands or millions, of valid guitar tones. When the air becomes electric, that’s the right sound, no matter what the one is.”
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After eight years, New Orleans artist Benjamin Booker returns with a new album and a redefined relationship to the guitar.
That evening, Booker played a release celebration show at Euclid Records in New Orleans, which has become the musician’s adopted hometown. He spent a few years in Los Angeles, and then in Australia, where his partner gave birth to their child, but when he moved back to the U.S. in December 2023, it was the only place he could imagine coming back to. “I just like that the city has kind of a magic quality to it,” he says. “It just feels kind of like you’re walking around a movie set all the time.”
Witness was a ruminative, lonesome record, an interpretation of the writer James Baldwin’s concept of bearing witness to atrocity and injustice in the United States. Mavis Staples sang on the title track, which addressed the centuries-old crisis of police killings and brutality carried out against black Americans. It was a significant change from the twitchy, bluesy garage-rock of Booker’s self-titled 2014 debut, the sort of tunes that put him on the map as a scrappy guitar-slinging hero. But Booker never planned on heroism; he had no interest in becoming some neatly packaged industry archetype. After Witness, and years of touring, including supporting the likes of Jack White and Neil Young, Booker withdrew.
He was searching for a sound. “I was just trying to find the things that I liked,” he explains. L.A. was a good place for his hunt. He went cratedigging at Stellaremnant for electronic records, and at Artform Studio in Highland Park for obscure jazz releases. It took a long time to put together the music he was chasing. “For a while, I left guitar, and was just trying to figure out what I was going to do,” says Booker. “I just wasn’t interested in it anymore. I hadn’t heard really that much guitar stuff that had really spoke to me.”
“For a while, I left guitar, and was just trying to figure out what I was going to do. I just wasn’t interested in it anymore.”
LOWER is Booker’s most sensitive and challenging record yet.
Among the few exceptions were Tortoise’s Jeff Parker and Dave Harrington from Darkside, players who moved Booker to focus more on creating ambient and abstract textures instead of riffs. Other sources of inspiration came from Nicolas Jaar, Loveliescrushing, Kevin Shields, Sophie, and JPEGMAFIA. When it came to make LOWER (which released on Booker’s own Fire Next Time Records, another nod to Baldwin), he took the influences that he picked up and put them onto guitar—more atmosphere, less “noodly stuff”: “This album, I was working a lot more with images, trying to get images that could get to the emotion that I was trying to get to.”
The result is a scraping, aching, exploratory album that demonstrates that Booker’s creative analysis of the world is sharper and more potent than ever. Opener “Black Opps” is a throbbing, metallic, garage-electronic thrill, running back decades of state surveillance, murder, and sabotage against Black community organizing. “LWA in the Trailer Park” is brighter by a slim margin, but just as simultaneously discordant and groovy. The looped fingerpicking of “Pompeii Statues” sets a grounding for Booker to narrate scenes of the homelessness crisis in Los Angeles. Even the acoustic strums of “Heavy on the Mind” are warped and stretched into something deeply affecting; ditto the sunny, garbage-smeared ’60s pop of “Show and Tell.” But LOWER is also breathtakingly beautiful and moving. “Slow Dance in a Gay Bar” and “Hope for the Night Time” intermingle moments of joy and lightness amid desperation and loneliness.
Booker worked with L.A.-based hip-hop and electronic producer Kenny Segal, trading stems endlessly over email to build the record. While he was surrounded by vintage guitars and amps to create Witness, Booker didn’t use a single amplifier in the process of making LOWER: He recorded all his guitars direct through an interface to his DAW. “It’s just me plugging my old Epiphone Olympic into the computer and then using software plugins to manipulate the sounds,” says Booker. For him, working digitally and “in the box” is the new frontier of guitar music, no different than how Hendrix and Clapton used never-heard-before fuzz pedals to blow people’s minds. “When I look at guitar players who are my favorites, a lot of [their playing] is related to the technology at the time,” he adds.
“When I look at guitar players who are my favorites, a lot of [their playing] is related to the technology at the time.”
Benjamin Booker's Gear
Booker didn’t use any amps on LOWER. He recorded his old Epiphone Olympic direct into his DAW.
Photo by Trenity Thomas
Guitars
- 1960s Epiphone Olympic
Effects
- Soundtoys Little AlterBoy
- Soundtoys Decapitator
- Soundtoys Devil-Loc Deluxe
- Soundtoys Little Plate
“I guess I have a problem with anything being too sugary. I wanted a little bit of ugliness.”
Inspired by a black metal documentary in which an artist asks for the cheapest mic possible, Booker used only basic plugins by Soundtoys, like the Decapitator, Little AlterBoy, and Little Plate, but the Devil-Loc Deluxe was the key for he and Segal to unlock the distorted, “three-dimensional world” they were seeking. “Because I was listening to more electronic music where there’s more of a focus on mixing than I would say in rock music, I think that I felt more inspired to go in and be surgical about it,” says Booker.
Part of that precision meant capturing the chaos of our world in all its terror and splendor. When he was younger, Booker spent a lot of time going to the Library of Congress and listening to archival interviews. On LOWER, he carries out his own archival sound research. “I like the idea of being able to put things like that in the music, for people to just hear it,” says Booker. “Even if they don’t know what it is, they’re catching a glimpse of life that happened at that time.”
On “Slow Dance in a Gay Bar,” there are birds chirping that he captured while living in Australia. Closer “Hope for the Night Time” features sounds from Los Angeles’ Grand Central Market. “Same Kind of Lonely” features audio of Booker’s baby laughing just after a clip from a school shooting. “I guess I have a problem with anything being too sugary,” says Booker. “I wanted a little bit of ugliness. We all have our regular lives that are just kind of interrupted constantly by insane acts of violence.”
That dichotomy is often difficult to compute, but Booker has made peace with it. “You hear people talking about, ‘I don’t want to have kids because the world is falling apart,’” he says. “But I mean, I feel like it’s always falling apart and building itself back up. Nothing lasts forever, even bad times.”
YouTube It
To go along with the record, Booker produced a string of music videos influenced by the work of director Paul Schrader and his fascination with “a troubled character on the edge, reaching for transcendence.” That vision is present in the video for lead single “LWA in the Trailer Park.”
Note the cavity cover on the back, which houses the components of Andy Summers’ mid-boost system.
In general, you can use any Telecaster and convert it to Andy Summers’ specs. If you want to stay as close as possible to the original guitar, the way to go is an alder body—just like Andy’s, which is 2-piece—with a 3-tone sunburst finish and white double binding.
The neck should be quarter-sawn, 1-piece maple with a C profile, 21 vintage-style frets, and a 7.25" fretboard radius. Of course, you can choose your own specs here, too. The original guitar has a brass nut rather than bone or plastic, and it should be no problem to find a brass nut blank for a Telecaster. You will need different tools to work on it compared to bone, plastic, or graphite, so keep this in mind. If you do not have the right tools or don’t feel comfortable making nuts, you should leave this task to your local guitar tech. Summers’ guitar has Schaller M6 tuning machines, which are still available from the German Schaller company, and two chrome butterfly string trees. You may not really need two of them—usually one for the B and the high E string will do the trick, especially with a well-made nut.
The original has a heavy brass bridge plate with six individual brass saddles, which will increase overall weight significantly. You can still buy this type of brass bridge from several companies, but there are much lighter bridges on the market.
The stereo output jack is installed in a rectangular chrome plate, like on a Les Paul, which I think is superior to the typical Telecaster jack cup. Interestingly, the plate on Summers’ guitar is only held by two of four screws, but do yourself a favor and use all four to make this spot as strong as possible. You should attach the plate really tight, especially when you use an output jack with a tight grip for the plug.
“Electronically, there is nothing too specialized that you will need for the controls.”
The rest of the hardware is chrome and standard: two regular strap buttons, a standard Telecaster control plate, ’60s Telecaster flat-top knobs, a black ’60s-style top-hat switch knob on the 3-way pickup selector switch, and two flat-lever mini-toggle switches. You should have no problem getting all of these parts from any guitar shop. The pickguard is a 3-ply mint green pickguard with a standard humbucker routing for the neck pickup.
Electronically, there is nothing too specialized that you will need for the controls: a standard 3-way pickup selector switch, two 250k audio pots for master volume and master tone, a gain control pot for the booster, and two additional mini DPDT on-on toggle switches for switching the booster on and off and for the phase control of the bridge pickup. The resistance of the gain control pot depends on the booster you want to use: e.g. for the Fender Clapton mid-boost kit, a 500k type will work great.
For the bridge pickup, there is a standard early-’60s-style Telecaster single-coil pickup, and every pickup company will have something like this in their catalog. Because the bridge pickup is installed to an out-of-phase mini-toggle switch, your pickup will need three conductors, with the metal base plate separated from the pickup’s common ground, and a third wire that connects the bridge plate individually to ground. If you have a regular two-conductor model, you need to break this connection, soldering a third wire directly to the base plate.
Interestingly, the bridge pickup on Summers’ Tele is installed directly into the wood of the pickup’s cavity. I see no reason why you shouldn’t install it the regular way on your guitar.
Here’s a close-up of the bridge on Summers’ historic Tele.
Photo courtesy of Ten-Guitars (https://ten-guitars.de)
In the neck position, there is a ’59 PAF humbucker with a conventional two-conductor wiring installed directly into the pickguard in the standard way, with the open pole pieces facing towards the neck. The choice of late-’50s PAF copies has never been better than it is today. You can buy excellent versions from a lot of companies, just make sure to choose the correct string spacing, which is usually called “F-spacing” or something similar, and is usually 2.070" (52.6 mm). (Gibson spacing, or G-spacing, is 1.930" or 49 mm.)
You’ll need humbucker routing on your body to make it fit. If you don’t have a body with humbucker routing and don’t want to get your Tele body re-routed, you can consider one of the numerous stacked humbuckers that will fit into a standard Telecaster neck pickup cavity. My experience is that there is a noticeable difference in tone compared to a full-sized humbucker, and it will be a compromise.
Next is the active booster. Finding a good booster module and wiring it up is much easier than fitting it into the tight space of a Telecaster body. There are a wide range of available booster options. There are complete DIY sets available that include the PCB and all of the necessary parts to build your own, and there are also drop-in PCBs that are already populated, like the well-known Fender mid-boost circuit kit. You can also find mini-sized booster modules using high-quality SMD parts, which only require a fraction of space compared to the regular PCBs.
“Finding a good booster module and wiring it up is much easier than fitting it into the tight space of a Telecaster body.”
The available options include treble boosters, mid-boost circuits, full-range boosters, etc. Choose what you like best. The problem will be that you need to stuff it into a Telecaster body. As you know, there is not much space inside a Telecaster, and you need to add the booster itself, the 9V battery, an additional pot for controlling the booster, and two additional mini-toggle switches—one for turning the booster on and off, and the other to get the bridge pickup out of phase. This is a lot of stuff! On Summers’ guitar, this problem was solved by adding a large cavity on the back and closing it with a plastic back plate, as on a Gibson Les Paul.
A look inside the cavity for the mid-boost unit.
Photo courtesy of TeleManDon from Vancouver Island, BC (https://tdpri.com)
You can clearly see the two big routings for the booster’s PCB and the 9V battery, plus the additional pot to control the amount of boost as well as the mini-toggle switch to turn the booster on and off. If you are not afraid of routing two big chambers into your Telecaster’s body, this is a suitable way to go.
On a Telecaster, there are not many alternatives I can think of to fit all these parts. One possible way of saving space would be to use a stacked pot with two 250k pots for volume and tone, so you have the second hole in the control plate available for the gain control pot of the booster. Between the two pots, it should be no problem to place the two mini-toggle switches. Or you use a push-pull pot for the gain control to save one of the mini-toggle switches. The guitar will look much cleaner, at least from the front side. But you still have to put the booster PCB and the battery somewhere. A customer of mine did this by completely routing the area under the pickguard. But even with only a regular single-coil neck pickup, it was a really tight fit, so with a regular-sized humbucker, it will be close to impossible. So, you or your luthier will have to be creative, and I wouldn’t be surprised if a company offers Andy Summers Telecaster bodies with all chambers already routed.
Here we go for the wiring. Wherever possible, I tried to keep the diagram as clean as possible. The wiring of the booster is only an example and depends on the booster you want to use, but the basic wiring is always the same.
Here’s a helpful schmatic of the Andy Summers‘ Telecaster wiring.
Illustration courtesy of SINGLECOIL (www.singlecoil.com)
That’s it. Next month, we will take a deep look into guitar cables and wires, what really makes a difference, and how you can use this to reshape your guitar tone. So stay tuned!
Until then ... keep on modding!
Grammy-nominated session guitarist, producer, mixer, and engineer Paul Moak stays busy on multiple fronts. Over the years he’s written, played, produced and more for TV sessions (Pretty Little Liars, One Tree Hill) and artists including Third Day, Leeland, and the Blind Boys of Alabama. But most recently he’s worked with Heart and Ann Wilson and Tripsitter.
Time Traveler
Moak is most loyal to a 1963 Stratocaster body that’s mated to a 1980s-vintage, 3-bolt, maple, bullet-truss-rod, 1969-style Fender Japan neck. The bridge has been swapped as many as four times and the bridge and neck pickups are Lindy Fralins.
Cool Cat
If there’s one guitar Moak would grab in a fire, it’s the Jaguar he’s had since age 20 and used in his band DC Talk. When Moak bought the guitar at Music Go Round in Minneapolis, the olympic white finish was almost perfect. He remains impressed with the breadth of tones. He likes the low-output single-coils for use with more expansive reverb effects.
Mystery Message Les Paul
Moak’s 1970 L.P. Custom has a number of 1969 parts. It was traded to Moak by the band Feel. Interestingly, the back is carved with the words “cheat” and “liar,” telling a tale we can only speculate about.
Dad Rocker
Almost equally near and dear to Moak’s heart is this 1968 Vox Folk Twelve that belonged to his father. It has the original magnetic pickup at the neck as well as a piezo installed by Moak.
Flexi Plexis
This rare and precious trio of plexis can be routed in mix-and-match fashion to any of Moak’s extensive selection of cabs—all of which are miked and ready to roll.
Vintage Voices
Moak’s amps skew British, but ’60s Fender tone is here in plentitude courtesy of a blonde-and-oxblood Bassman and 1965 Bandmaster as well as a 2x6L6 Slivertone 1484 Twin Twelve.
Guess What?
The H-Zog, which is the second version of Canadian amp builder Garnet’s Herzog tube-driven overdrive, can work as an overdrive or an amp head, but it’s probably most famous for Randy Bachman’s fuzzy-as-heck “American Woman” tone.
Stomp Staff
While the Eventide H90 that helps anchor Moak’s pedalboard can handle the job of many pedals, he may have more amp heads on hand than stompboxes. But essentials include a JHS Pulp ‘N’ Peel compressor/preamp, a DigiTech Whammy II, DigiTech FreqOut natural feedback generator, a Pete Cornish SS-3 drive, Klon Centaur, and Electro-Harmonix Deluxe Memory Man.
Reverend Descent W Baritone Electric Guitar - Transparent White
