If you’re the kind of guitarist that craves highly responsive overdrive—something that instantly responds to your pick attack and volume knob, like a well-tuned sportscar that hugs the road when you touch the wheel—Keeley Electronics’ new Tube Drive might be the vehicle of your dreams.
The powerful dual-overdrive pedal packs two distinct voices into one rugged, smart-looking enclosure. On one side, you get a genuine high-voltage (168V) vacuum tube overdrive featuring a 12AX7 tube. On the other side, Keeley’s iconic Super Phat Mod—a beefed up take on the beloved blues driver circuit.
You can use one circuit at a time or combine them for even more crazed fun. And with a simple foot gesture, you can switch effect order on the fly. “So, the pedal truly has four different sounds,” says Robert Keeley. “You have the tube channel, the drive channel, and then—depending on the order you choose—you have two other stacked-drive sounds. And this thing is just a dynamics monster,” he laughs. “It feels and sounds so natural when you control the dynamics with the volume on your guitar.”
Buckle Up and Blaze Away
Built from start to finish in the company’s Oklahoma City headquarters, the Tube Drive is Keeley’s very first tube pedal, and it explores an intriguing new direction as the company celebrates its 25th anniversary.
The new pedal delivers a gargantuan array of tones—ranging from subtle, edge-of-breakup overdrive to full-throttle fury—via a highly approachable control set. Each channel is activated by a dedicated footswitch and offers three control knobs: output level, gain, and tone. It’s all super intuitive, with no need to do a deep dive in an instruction manual—just plug in and start riffing.
With its straightforward layout and specially voiced circuitry, it’s strikingly easy to find your sound. It only takes a few minutes to dial in everything from warm, touch-sensitive tube grit to uber-thick, stacked overdrive tones. “We carefully picked the resistors to shape the bass response in such a way that it keeps all of your low notes nice and tight,” Keeley notes. “We wanted something well defined that wouldn’t get muddy. That is so important to the whole charisma of this pedal.”
About that single tone knob: “Yeah, it is a double-edged sword,” Keeley says. “On one hand, you have to make it simple so that people don’t have control-knob phobia. And you need to make sure that you offer enough range, so they can brighten their tone without making it shrill, but also make it nice and warm if you want. It’s a balancing act.”
Like a high-powered sportscar, the Tube Drive offers a streamlined, stripped-down aesthetic that emphasizes performance over posturing, while still benefitting from important hallmarks of the Keeley line—there are rugged construction and modern touches, such as soft switching and the ability to easily choose between true bypass and Keeley’s silent buffered switching.
Designed By Ear
As the company’s first tube pedal, the Tube Drive marks a milestone in the company’s expanding line of overdrive pedals created by Keeley Electronics’ design team. Craighton Hale (lead designer and engineer), Aaron Pierce (the “golden ears” of the team), and Aaron Tackett were all involved in the development of this pedal—a meticulous process even by Keeley’s exacting standards.
“Yes, it took us a long time,” Keeley nods. “We've been working on it for two-and-a-half years, largely due to all the tuning that we did by ear.” The company has eagerly embraced analytic audio measuring instruments in the design and building process, and for this reason Keeley’s lineup of pedals maintains a remarkably consistent tone and quality.
But there is no substitute for the most important element in pedal design: the human factor.
So, through multiple iterations and modifications, the team painstakingly nailed the Tube Drive sound. Keeley admits it was a challenge, but the results have paid off. “One, it has a huge dynamic range. And two, we tuned it by ear instead of by designing something very conventional. You’ll get the best results by focusing not just on what sounds good in your mind, but on what sounds good when you build it and put it together.”
And of course, there’s the added challenge of creating an entirely new design/build approach around the organic, sometimes unpredictable vacuum tube.
“Yes, the world of tubes is very strange,” Keeley laughs.
Gentlemen, Start Your Tubes!
At the center of every Tube Drive pedal is a premium Keeley-branded 12AX7 tube, carefully burned-in, fully tested, and proudly displayed behind a custom tube shield brandishing the stylized “K” of the Keeley logo. Keeley has invested in machines to systematically test each tube and ensure that each pedal sounds just right.
The high-voltage internal circuit—168 volts—is a key factor in the pedal’s sound. As Keeley puts it, “You have to get the tube properly cooking for it to do its magic. At that voltage it creates a whole different world of distortion. You’re going to get improved response and dynamics. So, by moving up to such a significantly higher voltage, that puts us in a much different class than most pedals. I think you get a unique tone print that’s very satisfying.”
The tube is held in place with a rubber grommet, so it’s always securely protected, and microphonics are minimized. “The rubber grommet keeps all the microphonics out of the signal,” Keeley says. “And even when you put it in a position where the drive channel’s gain comes after the tube—using the tube circuit feeding into the drive circuit—it’s still very microphonic free.”
If necessary, owners can easily replace the tube themselves. No need to take it to a tech—it’s fully self-service. But Keeley notes that it’s unlikely you’ll ever need to replace a worn-out tube. “I fully expect our tubes to last 10,000 hours. That’s 3,300 three-hour jams. I mean, you could have three-hour jams every night for 10 years before I expect these tubes to go bad. And I’m offering a two-year warranty on all our tube products.”
This Ain’t Keeley’s First Tube Rodeo
Robert Keeley’s first experience with tubes came before he even launched his pedal company. “In about 1996 or 1997, I got a book by Gerald Weber of Kendrick Amplifiers. I read it and was hypnotized by tube amps. And long before I ever thought about pedals, I got into modifying Fender tweed amps according to Weber’s books. That’s how I eventually came up with modding for pedals. Tube amps are where it all started. Eventually, an idea came to me in April of 2001. I thought, ‘Hey, I should build my own compressor since I can't afford these Ross compressors on eBay.’ I got parts from the military surplus and hand-wired a little Radio Shack perf board. That’s how it all began. I was into tubes way before pedals.”
The release of the Tube Drive and his return to the world of vacuum tubes represent a full-circle moment in Keeley’s journey—as well as a new chapter in his pedal design process. “This pedal comes out September 1, 2026, and that's the 25th anniversary of the company, which I launched in September of 2001. It’s funny how that works out.”
As Keeley Electronics begins its next 25 years of innovation, the new Tube Drive pedal offers a perfect bridge between the past, present, and future—combining classic tube technology with cutting-edge design and construction.
Do yourself a favor and rev up a Tube Drive and take it for a spin. Your ears will thank you.
