Asked to describe his new Muse Driver pedal, Robert Keeley keeps coming back to a single theme: versatility.
Based on Keeley’s much-admired Blues Driver-inspired circuit, and designed in collaboration with Andy Timmons, the Muse Driver features two different selectable overdrive voices and a pair of tone stack options. The result: a highly flexible and responsive pedal that’s likely to appeal to a broad range of players.
Keeley even came up with a new phrase, calling the pedal a “drive workstation” as a shorthand way to convey the Muse Driver’s versatility. “I was trying to say that it could do everything from a clean boost to distortion and overdrive and even fuzz,” he says. “The drive control is so dynamic that it offers incredible range.” That phrase wasn’t meant to be boastful; it simply seems like an accurate, compact way of getting the point across. “It becomes a workstation because you can get so much out of it. In my mind it qualifies as a workstation of drive pedals.”
Brandishing its myriad tones, the Muse Driver, with a street price of $199, is the second pedal in Keeley’s new line of sleek, seductive overdrives. It follows the Noble Screamer, a potent mash-up of the beloved Tube Screamer and Nobels ODR-1, which Keeley released in late 2023 to broad acclaim. The Muse Driver continues the Noble Screamer’s form factor, with dual toggle switches for modifying the circuit, and points the way for three more overdrives coming in 2024. (More on that shortly).
Tapping Into Timmons' Tone
Importantly, the Muse Driver represents the latest chapter in Keeley’s ongoing collaboration with Andy Timmons (known for his solo work and touring/recording with Danger Danger, Olivia Newton-John, Kip Winger, and many more). They first began working together in early 2020, when Timmons and Keeley teamed up on the wildly successful Halo dual echo pedal, and the creative partnership continued with the 2023 release of Timmons’ signature Keeley Super AT MOD overdrive.
For their newest collaboration, Keeley and Timmons once again used a modified Blues Driver circuit as the foundation of the tone. But this time around, the goal was to provide even more sonic options—enough to satisfy Timmons’ most expansive creative urges.
“The Muse Driver name is a play on words with the Blues Driver,” Timmons notes, “and Muse Driver really is an accurate term for the pedal because it reflects how inspiring it is. The core of both the Super AT Mod pedal and the Muse Driver were designed to capture the modded Blues Driver, but could really get those notes to speak and articulate in a certain way. The circuit gives me that clarity on the top end. With the Muse Driver pedal I feel like I’ve truly arrived. I can plug this into any nice, flat amp. It retains the clear top end and it speaks well. And it has a surprising amount of gain, that’s really usable. It doesn’t get too tubby or floppy in the low end. It’s very carveable. I started the search with the Keeley Blues Driver, and now I feel that it’s really there.”
“The gloves come off when we’re working with Andy,” Keeley adds with a laugh. “We’ll try almost anything to create something that’s going to be inspiring for him. I know my job is done when he gets excited and starts writing musical parts with it.”
Keeley Electronics - Muse Driver Overdrive and Distortion with Andy Timmons
Cracking the Diode Code
But it wasn’t easy getting there. “We had three different sessions for the Muse Driver,” says Timmons. “The key was Aaron Pierce [a core member of the Keeley creative team], Robert, and I being in the same room. At one point we thought we were really close,” Timmons admits, “and I’m driving back to Oklahoma. About an hour into the drive, I get a call from Robert. He had an epiphany: ‘We should try germanium diodes!’ Going from silicone to germanium diodes, you’re going from asymmetrical to symmetrical clipping, and it’s going to be a little less compressed. And it turned out to be exactly what I was looking for. The germanium turned it into an ideal pedal for full-on gain and lead tones. Now the pedal is capable of a huge range of tones.”
Andy Timmons Reacts to Germanium Mode
Keeley elaborates about the Timmons’ “AT” Drive mode: “In Andy’s mode there are a pair of diodes—one is a regular silicon diode and one is an LED. They have two different rates at which they start to conduct and it creates this asymmetrical clipping that I think kinda sounds like a tube. When you go to the RK mode [Robert Keeley’s original mode], that engages two back-to-back germanium diodes, which have a much lower voltage that they turn on. They also have an extra bit of capacitance which rounds off the highs. Because the Blues Driver is such a dynamic circuit, when you make a change there it’s going to be amplified and distorted further. These little differences between the silicon and germanium diodes are really amplified.”
The Human Factor ... Blended with Science
Another important current in the development of the Muse Driver: the increased use of advanced scientific tools at the Keeley shop, part of the company’s continuing evolution since it relocated to its new factory in 2021.
“We began using Audio Precision Analyzers starting in around May 2023,” Keeley explains. “We now have several of them so we can test every unit and make sure each unit is spot on, beyond the scope of human hearing. Every pedal gets a ‘birth certificate’ when it passes the analyzer test. I think that when we acquired those analyzers, Keeley Electronics went ‘professional audio,’ because now whenever we’re studying a rare vintage circuit of any kind, I can really see what it sounds like. And if Andy says, ‘I want less compression,’ I can huddle with the engineers and see how each stage of a circuit responds. It’s an amazing way to look at audio. It helps during the design phase and it helps during production. I now have a repeatable product that’s rock solid.”
Timmons lauds the scientific strides, but admits that the ultimate vindication arrives in your gut: “When you hit the ‘eureka’ moment and get it right, you can’t verbalize it. You feel it. Whether it’s the hair on your arms raising, or a smile on your face, you just know it’s there. That’s the only way to know. Sure, you can look at it on scopes and measure it on graphs—and those scientific measurements are certainly valuable—but the real test is how it makes you feel on a molecular level.”
Keeley agrees with a laugh: “The major benefit of working with a guy like Andy—and not just relying on a bunch of expensive analyzers and measurement tools—is that he really cares about all the nuances and dynamics! He’s an incredible player that LIVES in the world of dynamics and will explore the entire range. He shows how these circuits actually work for players, instead of machines.”
“The new era of Keeley is really a dream come true for me.” Keeley continues. “For 20 years I would look at other people’s equipment and how they progressed, and I finally feel like I’m at the point where I can take information from artists and their desires, and I can mix it with some of the great people and equipment that we have at the shop. We can study the circuits and listen to them in ways that we’ve never been able to do before.”
Keeley Factory Tour Drone Video
04 10 2023 Drone VideoMore Drives To Come!
The Muse Driver’s flexibility, with its two toggle switches for selecting overdrive voicing and tone stacks, is a hallmark of Keeley’s new series, which debuted with the Muse Driver’s predecessor, the Noble Screamer.
This powerful, versatile approach will culminate in spring 2024 with the release of three more overdrives in the series. Each will feature a pair of overdrive options based on iconic circuits—ranging from soft-clipping favorites to brawny, hard-clipping stalwarts—along with extra tone-shaping capabilities.
But in the meantime, Robert Keeley and his team are savoring the results of the rigorous-but-enjoyable process that yielded the new Muse Driver. “These signature pedals with Andy Timmons are really special,” Keeley says. “They have to be dynamic, expressive instruments in their own right. I know it might sound old-fashioned and quirky, but Andy’s name doesn’t go onto these pedals until he’s satisfied. It’s a lot of work, but it’s also so much fun.”
Lyle Lovett once told me in an interview, “There’s nothing that sounds better to me than an acoustic guitar played into a microphone or into the air in a room.” That’s an understandable sentiment, and since Lovett and other acoustic guitarists rely primarily on natural sustain, many wrestle with adding electronics to the sonic recipe. Undersaddle pickups, DI boxes, and then, at the end of the signal chain, amplifiers, all pose threats to acoustic fidelity, which purists don’t take lightly. Measuring at 8.1" x 10.4" x 9.5" and weighing in at 9.1 pounds, the bantamweight Fishman Loudbox Micro ($299 street), however, is an affordable and compact option that may put their ears and nerves at ease.
Simple, Set, Go!
The Loudbox Micro is very straightforward. It has instrument and mic channels distinguished by 1/4"and XLR inputs respectively. The instrument channel’s controls include gain, low, mid, high, reverb and chorus intensity, and a phase switch. (The chorus also has two preset voices—one softer and subtler, the other pleasant but intense—that are adjusted from either side of noon on the chorus intensity knob.
I’ve been an almost strictly acoustic player for the past 16 years, until recently, when a switch inexplicably flipped and I shifted my gaze to electric. When I plugged my Washburn Bella Tono Elegante (with an L.R. Baggs Anthem SL undersaddle pickup and preamp) into the 40-watt Loudbox Micro, it had been three and a half months since I’d heard it at all (I almost shed a tear). Amplified, my guitar tends to sound pretty clean and uncompromised, and these characteristics were plainly audible through the Loudbox Micro.
The desired effect of an acoustic amp is to plug in, start playing, and say, “Is it on?” With the master volume at noon, gain at 8 o’clock, and the 3-band EQ controls all at noon, the Loudbox Micro pretty much pulled that off, save for the tiniest bit of speaker hiss. The Washburn is a warm guitar with pretty high end presence. Both attributes can be heard clearly through the 5.25" poly cone woofer and the .8" soft dome tweeter. The Fishman preserves that critical brightness in fingerpicking tunes, and keeps string separation intact when strummed. If anything, the tone from the Fishman was a little bit rounder than when unplugged, but only slightly and certainly not so much so that it weighed down the clean tone.
At lower master volume and higher gain levels (in this case at 8 o’clock and 3 o’clock, respectively) I found that the tone got a little too round and some fidelity was lost. With the higher master volume settings, I was able to turn the gain up to 10 o’clock before I heard feedback. At the lower master volume, I could turn the gain to near-maximum levels. If your ears fail you for some reason, you can also consult the clipping light on the console that indicates when the gain is too high.
I enjoyed hearing the reverb convert my decently sized living room into something like a concert hall. The reverb has relatively low diffusion, and I heard it as subtle and distinctive, with enough decay to achieve a large hall effect. With my recent dive into electric guitar, I’ve become a bigger fan of chorus, so I was a little disappointed to discover that I could only really hear much of it in the mix when turned halfway up on the second, more intense preset. That’s a minor drawback. Heavy chorus is not the most commonly sought-out acoustic color. Still, it’s nice to have a strong voice to experiment with.
The Verdict
The Loudbox Micro is a reliable amp that, with the right settings, will keep your acoustic tones authentic and true. Its diminutive size and 40-watt power make it an ideal companion for gigs in small to medium rooms, and its onboard reverb and chorus are a plus. At $299, it might even keep Lyle Lovett happy.
Billy Strings
Billy Strings’ Pedalboard
Bluegrass’ biggest ambassador has continued expanding his sound with more pedals and more modeling. When Billy wants to turn his acoustic into space dust, he’s got a hearty squadron of willing vaporizers. This is where Strings tap dances each night—an incredible feat given how much he’s already doing with his hands. A RJM Mastermind GT MIDI switcher is the brains of the operation as it engages all his pedals and the Kemper’s SLO-100 profile. The Grace Design BiX gives FOH a clean, pure acoustic sound. A pair of Mission Engineering SP-1 expression pedals handle manipulating time-based and modulation effects. His two Ernie Ball 40th Anniversary Volume Pedals bring in Leslie effects and the Kemper. A TC Electronic Ditto Looper remains on the board since our last encounter. A Peterson StroboStomp HD covers any on-the-fly tuning needs during his sets. Nashville’s XAct Tone Solutions built out this tonal headquarters, which features several of their custom devices and routing boxes. A couple Strymon Zuma units power everything on the floor, while a duo of Radial boxes helps organize. (The SGI-44 talks to the rack-mounted JX44, and the JDI is a passive direct box designed to handle gobs of levels without any unwanted crunch.)
Here’s a peek behind the scenes, into the inside of Strings’ rack. Starting at the top left, he has a Voodoo Lab Sparkle Drive, Electro-Harmonix Micro POG, MXR Bass Envelope Filter, Source Audio EQ2, Boss DD-8 Digital Delay, Source Audio C4 Synth, and a Strymon Lex. A Strymon Ojai powers the pedals in this drawer. Moving to the right, he has a Jam Pedals Waterfall, Boss SY-1 Synthesizer, EHX Pitch Fork, Red Panda Raster, and an Eventide H9. All of these gizmos are powered by a Strymon Zuma. Going down to the bottom left, Strings assembles this drawer with a NativeAudio Pretty Bird Woman, a Chase Bliss Wombtone, Source Audio Nemesis, DigiTech Polara, Boss DC-2W Dimension C, and an EHX Freeze. Another Strymon Zuma powers all these creatures. The final drawer houses a Chase Bliss Audio Mood, EHX Intelligent Harmony Machine, and a Chase Bliss Automatone MKII Preamp. Everything comes to life with a final Strymon Zuma.
Blu DeTiger
Blu DeTiger’s Pedalboard
“I haven’t gone through that phase of using crazy pedals yet. Live, I just really love the sound of a clean bass tone,” admits bassist DeTiger. Whether slapping on TikTok, headlining solo tours, performing with Jack Antonoff and Olivia Rodrigo, or improvising over her DJ set, this board represents her go-to gear. Each piece in this cast of characters gets used for specific moments. She uses the octave up on the Electro-Harmonix Micro POG for “shredding” and the sub octave setting to “change the vibe for a second.” The Electro-Harmonix Bass Big Muff enhances some of the POG’s shadings with added stank. The EarthQuaker Devices Spatial Delivery is used for the funky intro to “enough 4 u,” her collaboration with Chromeo. She prefers the Spatial Delivery to the Mu-FX Micro-Tron III (which doesn’t get used at all now) and the MXR Analog Chorus is engaged for one instance. The Boss RE-2 Space Echo sees action with the Strat for “Sonic Youth freakouts” during “Kinda Miss You.” A Boss TU-3 Chromatic Tuner keeps all four strings in line and a Voodoo Lab Pedal Power 2 Plus provides the volts.
Christone “Kingfish” Ingram
Kingfish’s Pedalboard
Christone “Kingfish” Ingram is well on his way to becoming the blues’ newest 6-string ruler and he doesn’t use much gear to get the job done. Kingfish’s signal starts with a Shure BLX4 Wireless Receiver, which hits a Boss TU-3W Tuner. From there, the route is a Dunlop Cry Baby Mini Wah, a Marshall Shredmaster, and a Boss DD-3 Delay, all powered by Strymon. The pedals live on a Pedaltrain Nano board and were assembled by Barry O’Neal at XAct Tone Solutions.
Emily Wolfe
Emily Wolfe’s Pedalboard
“If I get a new piece of gear, I have to figure out every single part of it before I can really use it,” the shreddin’ Texan confessed to PG while talking about her 2021 album, Outlier. That sensible curiosity has led her to dialing in precise parameters on the pedals and creating colossal combos with singular gain staging. Her silver bullet is the EarthQuaker Devices Tentacle Analog Octave Up, running into a Fulltone OCD, and an MXR Six Band EQ. Wolfe claimed to PG, “That’s the sound that belongs to me.” The sequence creates a “crazy fuzztone” from the overdrive. Then she uses the EQ to reduce some of the lows and boost the mids for a sound she says will get her guitar to cut through any mix.
Other spices in the rack include an Analog Man King of Tone, an EarthQuaker Devices Dirt Transmitter fuzz, an Ibanez Analog Delay Mini, an Origin Effects Cali76 Compact Deluxe, a Walrus Audio Julia, and a Strymon Flint. The Empress Buffer puts the Delay Mini and Flint outside the RJM Mastermind PBC’s control.
Underneath the hood, Wolfe has tucked in a pair of MXR M109S Six Band EQ pedals (one hitting the King of Tone and the other hitting the OCD), an Electro-Harmonix Pitch Fork, the EarthQuaker Devices Tentacle, and a couple of Strymon power supplies (Ojai and Zuma).
Hermanos Gutiérrez
Estevan Gutiérrez’s Pedalboard
The Gutiérrez brothers pack light. You can see that Estevan Gutiérrez utilizes nearly every square inch of his pedalboard. Overlaps between the brothers’ boards include the MXR Dyna Comp Mini, the Strymon Flint, and the Strymon El Capistan. You might think their setup is basic now, but they used to play sans pedals. Eventually, Estevan discovered the Strymon El Capistan, and their sound was never the same. “I remember that day,” he recounted to PG about first playing the pedal. “I fell in love. I knew it was gonna change something in our sound.” As soon as he purchased the El Capistan, he called his brother and said, “You have to buy this. This is gonna be next level for us.”
The remaining effects for Estevan include a Malekko Omicron Vibrato, a Boss RC-500 Loop Station, and a Boss TU-3 Chromatic Tuner (off the board) keeps his Gretsch in check. Lastly, you’ll notice a G7th Performance 3 ART Capo on the pedalboard, too.
Alejandro Gutiérrez’s Pedalboard
Alejandro, who plays guitar and lap steel, relies on this compact board that holds a MXR Dyna Comp Mini, a Boss GE-7 Equalizer, a Strymon Flint, and the influential Strymon El Capistan. While Estevan discovered the El Cap and unlocked its magic for Hermanos Gutiérrez, Alejandro has molded it to his sound in different ways. “I use it as a layer,” he explains. “Really subtle. My brother uses it more as a delay. He has this horse sound, like this galloping sound he can create with his slapping, which only he can do.” A Boss TU-3 keeps his guitars in line.
Nile Rodgers
Nile Rodgers’ Pedalboard
The Hitmaker doesn’t drown in effects. Instead, Rodgers maintains a simple, sophisticated signal chain into his Fender Hot Rod Deville. Rodgers uses a Pedaltrain Classic 2, loaded up with an Eventide PowerMax Power Supply. The Eventide feeds a Korg Pitchblack Chromatic Tuner, a Boss DD-3 Digital Delay, an Ibanez CS9 Stereo Chorus, a Mad Professor Snow White AutoWah, an Ibanez TS808 40th Anniversary Tube Screamer, and a Jam Pedals Wahcko Wah Pedal. The stompboxes are all wired together with Reference Laboratory RIC-01 cabling.
Rodrigo y Gabriela
Rodrigo Sánchez’s Pedalboard
The eclectic, trailblazing guitar maestros blend acoustic and electric sounds in their respective rigs. The pickup return from Sánchez’s wireless rack goes to the volume pedal via a Lehle 3at1 switcher, then out to a Lehle P-Split signal splitter. The direct out from the P-Split goes to another Lehle splitter, while the ISO line out runs to the rest of the pedals before ending up at a Fractal. (The ISO out of the first splitter goes to the JHS Mini A/B pedal into the Boss OC-3, then to a separate channel on the desk.) His tone-shapers include an MXR Micro Amp, TWA WR-3 Wah Rocker, MXR Analog Chorus, and a Boss DD-3 Digital Delay. He stays in tune thanks to a Boss TU-3S Chromatic Tuner. It’s all powered by a pair of Truetone 1 Spot Pro CS7 power supplies.
Gabriela Quintero’s Pedalboard
It doesn’t get much simpler than this. Quintero’s pedalboard funnels the acoustic’s first two channels—the undersaddle and the body’s piezos—into a stereo volume pedal. From there, they run through a Dunlop Cry Baby and a Boss DD-3 Digital Delay. The signal is then split, with the first side going back to the DI, and the second running through a Dunlop volume pedal into a Boss OC-3 for an extra bottom octave.
Sunn O)))
Stephen O’Malley’s Pedalboard
Drone metal overlords Stephen O’Malley and Greg Anderson use volume as an aesthetic. “My concept in playing this music for tone involves many, many, many different gain stages that are all intonated differently depending on the pitch of the sound,” O’Malley told us last year. “There are slight shades of color saturation or grain as if it’s a paint—the shorter bandwidth color gradation or the density of the paint.” All these subtle sweeps of saturation, sustain, and feedback are enlivened and exaggerated with Stephen’s pedal palette. His current collection of slaughtering stomps includes the band’s most recent collaboration with EarthQuaker Devices (Life Pedal V3), an Ace Tone FM-3 Fuzz Master, a Pete Cornish G-2, and an EarthQuaker Devices Black Ash. For subtler shadings, he has a J. Rockett Audio Designs Archer.
The EQD Swiss Things creates effects loops to engage the FM-3, G-2, or the Black Ash. In addition, he runs a Roland RE-201 Space Echo through the Swiss Things. O’Malley uses the Aguilar Octamizer as a “fun punctuation that comes on once in a while” that “abstracts the guitar into minimalist electronics.” The custom Bright Onion Pedals switcher keeps the amps in sync with phase controls and ground lifts. A Peterson StroboStomp HD keeps his Travis Bean in check. Off to the side of the board is a Keeley-modded RAT that initiated the band’s core sound, plus a Lehle Mono Volume. This circuit includes the heralded LM308 chip and was the basis for their partnership with EQD and the Life Pedal series.
Elevated off the stage floor and secured by a stand are O’Malley’s Roland RE-201 Space Echo and Oto Machines BAM Space Generator Reverb.
Greg Anderson’s Pedalboard
“To be honest with you, I try to keep it pretty simple now because I love pedals and have fallen down a lot of rabbit holes with them, but I found myself troubleshooting and having more issues than my sound warranted. When I started with this band, it was just a RAT and tuner pedal, so I try to just bring what I need,” says Anderson. He found a potent pairing with the EQD Life Pedal V2 acting as a boost and running into a vintage Electro-Harmonix Civil War Big Muff that creates a “powerful, chewy, ooze” tone. Like O’Malley, he also has a custom Bright Onion Pedals box and an Aguilar Octamizer set to unleash a “ridiculous, beating, fighting, chaotic, sub-bass sound.” An Ernie Ball VP JR handles dynamics, a Boss TU-2 Chromatic Tuner keeps his Les Paul in shape, and an MXR Mini Iso-Brick powers his pedals.
The Flaming Lips
Steven Drozd’s Pedalboard
Given the nature of the Flaming Lips’ expansive and deranged sounds, you wouldn’t be blamed if you thought Drozd would have a rack of pedals or three tethered boards. But you’d be wrong—as he’s currently touring with nine stomps and an Ernie Ball volume pedal. Doing a lot of the heavy lifting is the Boss GT-1000CORE. The other sonic scalpels and sizzlers are a Subdecay Liquid Sunshine, a duo of Universal Audio units—a Starlight Echo Station delay and Golden Reverberator—a TC Electronic Spark Booster, a ZVEX Fuzz Factory, a Source Audio Nemesis Delay, a Keeley Electronics 30ms Automatic Double Tracker, and a Boss EQ-200 Graphic Equalizer.
Unknown Mortal Orchestra
Ruban Nielson’s Pedalboard
The New Zealand guitarist is a tone tactician. He’s never been satisfied with stock sounds and a pedal’s inherent limitations. “If I find a pedal I like, I use it for a long time and then I try to build a clone to see if I can improve on it,” he explains. “I sit around in my basement tweaking it plugged in—on the breadboard—and changing out different components and adjusting the trim until I get everything just exactly how I want it.” So, looking down at his stomp selection you’ll notice a few nondescript devices on the beautiful Twin Peaks Woodworks pedalboard custom-built by both Nielson’s tech Ben Gram and Caspian guitarist Jonny Ashburn.
His signal hits an Effectrode PC-2A Tube Compressor (you’ll notice two on the board—one is a backup). He enjoys how the PC-2A up front fattens his entire sound, and how it smooths and shaves off the transient tinges. The Strymon Deco has a stereo out that hits a pair of JAM Pedals RetroVibes. Both are set to have slightly different speeds and depths so that they really take that stereo signal for a journey in real time, and they’re panned in the PA to amplify this effect.
One of Nielson’s creations shows up inside the gray box titled “Octave Magic,” which is based on the Foxx Tone Machine. The suede purple devil next to it is the JAM Fuzz Phrase LTD, about which Nielson says, “It’s the wooliest, most musical Fuzz Face I’ve ever played.” Sometimes the answer to Nielson’s problems is the Benson Germanium Boost. “If something’s wrong,” he explains, “I’ll kick on that pedal and it makes everything louder and resets the gain structure.” The Gamechanger Audio Plus pedal sees a lot of action throughout the set: It helps Nielson seam the tail end of a solo and discreetly rejoin the band in rhythm mode.
The remaining pedals include a Boss DD-3 Digital Delay (a gift from Mike Baranik), a Danelectro Back Talk reverse delay, an Electro-Harmonix Holy Grail reverb, and in the top-left corner, an unnamed pedal that Nielson built that is currently not in the signal. (He can’t remember if it’s a RAT or Tube Screamer clone.) Utility boxes include a Boss TU-3 Chromatic Tuner, an Electro-Harmonix Switchblade Plus channel selector, and a Lehle Little Dual II switcher.