Designed to offer both warm, rich tube tones in a compact combo, the Adam Clayton ACB 50 Bass Amp is a tribute to the U2 bassist's achievements, as well as his sound and harmonic style.
“I’ve worked very hard with Fender on the Adam Clayton ACB 50 Bass Amp and I’m immensely proud of our creation,” said Adam Clayton. “I always found when I was starting out that it was very hard to find an amp that offered the mid-range distorted sound that I liked. This amp offers it in spades. It’s also very versatile, and if you’re moving around a lot or if you don’t have much space where you practice, then this is the amp for you.”
Featuring two distinctly different channels – a classic Fender sound and a more modern hi-fi, flat EQ tone, the Adam Clayton ACB 50 Bass Amp achieves all the sounds needed in any musical situation and is the perfect companion for any bassist, whether they’re playing in a studio, a club or on an arena stage. Classic Fender cosmetics: black textured vinyl, chrome panel, chicken head knobs and an aged silver grille cloth give the Adam Clayton ACB 50 Bass Amp a look that players around the world have come to love. The Adam Clayton ACB 50 Bass Amp includes a lightweight Eminence Neo 15” speaker that helps accentuate its fat, powerful sound and features an XLR line out to send that great tone to your home recording rig or front-of-house.
Exploring The Adam Clayton ACB 50 Bass Amp | Fender Artist Signature | Fender
“Adam Clayton is a true icon and working with him on the Adam Clayton ACB 50 Bass Amp has been an absolute privilege,” said Justin Norvell, Executive Vice President of Products at FMIC. “This is the first signature bass amp we’ve ever done and the first all-tube bass combo Fender has produced for over 40 years. We are extremely excited by the project and we’ve worked tirelessly to make it extra special. Designed for the pros, by the pros, the amp has a unique combination of that classic Fender look with contemporary style and features like the dual channels and the lightweight Eminence speaker that we’re sure are going to make it incredibly popular with bassists.”
ADAM CLAYTON ACB 50 BASS AMP ($2199.99 USD, £1,999.00 GBP, €2,399.00 EUR, $2,199 AUD, ¥253,000 JPY) Inspired by Adam Clayton, the Fender Adam Clayton ACB 50 Bass Amp offers warm, harmonically rich tube tones that are perfect for the studio, club or arena stage. Featuring two distinctly different channels – a classic Fender sound and a more modern hi-fi, flat EQ tone, the Adam Clayton ACB 50 Bass Amp achieves all the sounds you need in any musical situation. Classic cosmetics: black textured vinyl, chrome panel, chicken head knobs and an aged silver grille cloth give the Adam Clayton ACB 50 Bass Amp a classic Fender look that players around the world have come to love. The Adam Clayton ACB 50 Bass Amp includes a lightweight Eminence Neo 15” speaker that helps accentuate its fat, powerful sound and features an XLR line out to send that great tone to your home recording rig or front-of-house.
For more information, please visit fender.com.
Combining a ferocious fuzz circuit with remarkably powerful pitch-shifting capabilities, Keeley’s new Octa Psi pedal makes it easy to blow your mind … and have a ton of fun in the process.
It’s capable of creating pleasing and/or demented intervals, subtle harmonizing, expansive octaves up and down, and swooping pitch changes—all turbocharged by one of the gnarliest fuzzes this side of Armageddon.
Simply Psychoactive ... By Intent
If you’ve ever craved a user-friendly freakout, this is it. With just five knobs, two 3-way toggle switches, and a pair of footswitches—as well as an expression pedal input—the Octa Psi presents a comfortable, inviting portal to a universe of crazy sonic exploration.
That’s exactly what Robert Keeley intended from the moment he started designing the Octa Psi.
“The finished pedal is true to the original idea that I had in November 2021,” Keeley says. “I wanted it to have a high-gain vintage Muff, all-analog and all-transistor, going into an octave pitch shifter—something in the neighborhood of a Pitch Fork or POG. And then when I added the expression pedal function, it could resemble a whammy.”
Ah yes, the expression pedal input. Linking the Octa Psi with a standard expression pedal opens the door to a whole new dimension of pitch shifting mayhem. Rest assured, you don’t have to use an expression pedal to derive crazy fun from the Octa Psi. But it sure helps.
With all of the pedal’s deep functionality, Keeley felt that simplicity would be a key factor in broadening its appeal, starting with this elemental item: “From the get-go I wanted it to have order switching, allowing the fuzz feeding the pitch shifter or vice versa, because it gives you two distinctly different sounds if you have pitch going before or after the fuzz. And it had to be pretty effortless for the player to switch the order on the fly. And I wanted it to be easy to switch between using it either as a harmonizer or as an all-wet octave-down thing.” That desire for ease-of-use, even in the middle of a live gig, drove the design of the pedal’s controls and functions.
“I wanted to come up with something that Jack White, Steve Vai, or Frank Zappa would have fun with.”
It Ain't Easy to Create Easiness
The Octa Psi exemplifies an old adage: Sometimes a simple solution can be the most difficult to achieve. “I knew this was going to be a challenging project,” Keeley admits. “It’s very tough to combine a high-gain, full-analog distortion with a DSP [digital signal processing] section in one box. It took a long time to get the switching just right. It was particularly difficult because the Octa Psi’s analog and DSP sections are so intimately entwined. You can’t have gaps in the audio when you’re switching back and forth. Those kinds of complications drove us crazy.
“We also addressed a lot of issues that have raised concerns about other products on the market. The Octa Psi is a true-bypass pitch shifter, and it has our killer buffer system as well. There’s nothing else out there like this, so we had to figure it all out for ourselves.“
An essential challenge: voicing the fuzz so that it would sound great as a standalone effect, while also playing nicely with the Octa Psi’s harmonizer functions. “You would think that the fuzz was easy, but it was actually one of the last things we ironed out,” Keeley notes. “I had to ask myself, ‘Do I want this to be a bass-y fuzz?’ Probably not, since the pitch shifter can add octave down. But it’s got to be an amazing sounding fuzz if I want people to consider buying it. It has to sound great when compared to any Big Muff, and it has to effortlessly pair with a DSP section. So, getting the fuzz just right turned out to be the hardest part!”
The pedal design process also encountered some last-minute wrinkles. “The ramping and momentary switching capability was the last big feature that was added. That ramping function is like having an onboard expression pedal. We talked about it in the beginning of the process with Sarah Lipstate [also known as the artist Noveller], when Aaron Pierce [a key member on the Keeley team] was working on the initial concept. Later, Michael Kaye—the guitar tech for Pete Townsend and Trey Anastasio—asked, ‘Does it have momentary switching?’ and I was like, ‘Oh crap, I forgot about that!’” Keeley laughs.
The How-To Guide for Octa Psi's Hidden Features
For all of its readily accessible capabilities, the Octa Psi boasts several essential features that can only be accessed by using more than a single knob or switch. To unlock these features, it helps to have a few simple, specific instructions. For this reason, Keeley has included a brisk, handy primer on the back of each pedal. The Octa Psi’s key “hidden features” include:
- EFFECT ORDER: You can instantly switch the effect order by simultaneously holding the octave and fuzz footswitches.
- WET/DRY SELECTION: Double-click the blend control knob for switching between wet/dry blending or wet-only.
- MOMENTARY/LATCHING OPTION: Press and hold the fuzz footswitch to choose between momentary or latching operation. This is crucial if you plan on using the Octa Psi’s adventurous pitch shift ramping capability: the output signal begins with the initial note(s) you’re playing, and then veers up or down to the effected pitch. The ramp speed—i.e. how quickly this veering effect lasts—is controlled by….
- RAMP SPEED: If you’re using pitch shifting in the momentary mode, you can adjust the ramp speed by pressing and holding the octave footswitch down, then adjusting the blend knob control.
Part of an Ongoing Evolution
The Octa Psi underscores the continuing evolution of Keeley’s product line. In particular, it benefits from a pair of preceding Keeley devices: the I Get Around Rotary Simulator pedal and California Girls Twelve String Simulator—two pedals that were released in summer 2024 as exclusive offerings for the U.S. retailer Sweetwater, timed to coincide with The Beach Boys documentary on Disney+.
“That Beach Boys project did so much to help the DSP side of the Octa Psi,” says Keeley. “I got audio analyzers in so I could study the signals. We found out that we had to make our power supplies better because of the Beach Boys pedals, and that revolutionized our design. Everything that comes out since the Beach Boys pedals is going to sound even better. Plus, it was a lot of fun working with Sweetwater and JHS Pedals.”
Interestingly, for the Octa Psi project, the Keeley design team did not rely on much input from the company’s long list of affiliated artists. “I didn’t really have an artist that is a pitch/fuzz guru, so I had to keep it pretty much to ourselves. I knew that it had to be very musical—as musical as we could get it. And thankfully we have a team that can make this happen.”
The Keeley product development squad includes electrical engineer Craighton Hale, programmer Aaron Tackett, and Aaron Pierce—the “golden ears” member of the design group who helps analyze the sounds. “I’m just one part of the team of engineers that help make the products come to life,” Keeley notes.
Fun for Everyone
In the end, Keeley hopes that the Octa Psi pedal finds new and unconventional uses in the real world. “I wanted to come up with something that Jack White, Steve Vai, or Frank Zappa would have fun with—something that does all the crazy pitch-shifting with a purpose. And I’m hoping that musicians of all types will be attracted to this. People who want to distort their drums or bass or synth, and then start taking advantage of the pitch shifting. It’s almost like you get a great fuzz with the pitch shifter for free. On the other hand, I wouldn’t be surprised if some people use just the pitch shifter, if they’re not a fuzz maniac. You can get a lot of fun out of it without an expression pedal.”
Whether you’re a brazen sonic adventurer, or simply looking for a great-sounding dual function fuzz/harmonizer pedal, the Octa Psi offers a galaxy of tones for your arsenal.
B.B. King live, 1971.
Creative Commons: https://creativecommons.org/licenses/by-sa/2.0/
But there’s more to the tale. From 1935 to 1965, Nashville was arguably the epicenter of Black American music. Along the 30 blocks straddling Jefferson Street—Nashville’s own “Black Wall Street”—were a host of clubs, including Club Baron, Club Stealaway, the Del Morocco, and the Black Diamond, that showcased live music from 7 p.m. until 3 a.m. every weekend. And the roster of talent included a who’s who of national acts—Count Basie, Ray Charles, Ike & Tina Turner, B.B. King, Otis Redding, Etta James, Little Richard, Hank Crawford, James Brown—and formidable locals like Johnny “Blues Boy” Terrell, Gene Allison, Jimmy Church, Marion James, Charles “Wigg” Walker, Frank Howard, and two highly notable guitarists: Johnny Jones, the big dog of Nashville rhythm & blues guitar, and young upstart Jimi Hendrix.
Lorenzo Washington is the founder, guide, and curator of the Jefferson Street Sound Museum, where he provides a living introduction to the Black-music culture that first defined Music City.
But there’s stillmore to the story. In 1946, Nashville’s WLAC became the first major radio station to play R&B records, defying the city fathers and Jim Crow. Its signal reached 28 states and three Canadian provinces, making WLAC the platform by which Black music was introduced to the mainstream. WLAC’s impact on the sales of the indie labels recording Black artists at the time was tremendous.
Not only that. In 1964, Night Train, filmed at WLAC-TV, became the first syndicated R&B television show. Hosted and programmed by Noble Blackwell (who would eventually have an influential career in radio), and with an all-Black cast, Night Train featured local and national acts, and was the template for Soul Train.
“A host of clubs, including Club Baron, Club Stealaway, the Del Morocco, and the Black Diamond, showcased live music from 7 p.m. until 3 a.m. every weekend.”
After two years, pressure from the owners of the Grand Ole Opry caused WLAC’s owners to cancel Night Train, which the Opry perceived as a threat to ticket sales, according to Blackwell’s widow, Katie, and performers Church and Howard. And the radio station’s new management also pulled the plug on its R&B programming. At the same time, Nashville’s establishment—which had long waged a cultural war against the Black community along Jefferson Street—managed the coup de grâce they’d sought for decades by redlining and constructing Interstate 40 through the heart of Jefferson, where bridge abutments now mark the location of some of these historic clubs.
Today, most of the entertainers, DJs, and entrepreneurs responsible for Nashville’s—and therefore, in part, the nation’s—R&B revolution are dead, although on a lucky night you can still hear Walker, Church, or Howard turn back time onstage. But all of those memories and as much history as you can fit into the ground floor of a small house can be found at the Jefferson Street Sound Museum. For the past 23 years, the Museum at 2004 Jefferson has been the passion project of Lorenzo Washington. He secured the building in 2011 for a studio, but a year later felt a calling to create a temple dedicated to preserving Jefferson Street’s musical legacy—an urgency amplified as the local players who were there expired.
When you go to the Jefferson Street Sound Museum, you’ll find plenty of artifacts, from period-correct guitars to the old WLAC broadcast board, and handbills, posters, autographed photos, and ephemera. But the most important exhibit is Lorenzo. Beginning in the late 1950s, he was on the scene, as a fan and friend to the musicians, and even as a driver for songwriter and producer Ted Jarrett.
At 81, Lorenzo’s memory and storytelling skills are exquisite. Warm-hearted and welcoming, he can talk about Hendrix’s days as a maverick in the world of straight R&B, of the menus served while the musicians entertained, of B.B. King driving dancers to a frenzy, and even about the Nashville Stars, the city’s beloved Negro League baseball team that was bankrolled by Sou Bridgeforth, a numbers operator and the owner of the New Era Club, where Etta James recorded her blazing Rocks the House album in 1963. For his work preserving Music City’s foundational music culture, Lorenzo has been honored by the city with Lorenzo Washington Day and is the subject of a living legends exhibit at the National Museum of African American Music (NMAAM) in downtown Nashville.
So, if you’re coming to Nashville, you’ll want to visit Broadway, and the big attractions like the Country Music Hall of Fame and Museum and NMAMM. But if you really want to learn about the roots of Music City, go to 2004 Jefferson Street, and have a conversation with history.
