Fast response amps of yesterday and today: Vox AC30 and Mad Professor CS-40 are compared
In the September 2010 issue, we began
exploring the subject of fast-response
amplifier designs with a column on Hiwatt
heads (“Mo’ Watts—A Nostalgic Look at Hiwatt”). Let’s continue this discussion
using the same amp we cited before
as a classic example of fast-response
circuitry—a vintage Vox AC30. But this
time we’ll compare our reference AC30 to
a more modern example of a great fast-response
amplifier—the Mad Professor
CS-40 head. By the way, if you haven’t
yet had the opportunity to play a fast-response
amplifier, you’re in for a treat:
Experiencing the sheer speed of picked
notes rushing through the speakers can
change the way you think about guitar.
Let the Fun Begin
A vintage Vox AC30 produces a very
springy sound because it has more
output-tube compression factored into
its design than the Mad Professor CS-40.
This compression is one of the reasons a
properly maintained original AC30 is so
much fun to play. By contrast, the CS-40
uses the least amount of output-tube
compression of any modern guitar amplifier
that I know of. However, both these
amplifiers are very fast and very dynamic.
And, oddly enough, despite the difference
in output-tube compression, both
have a hauntingly familiar and similar feel.
I’m writing this column in Boston, where
I’ve been able to compare stellar examples
of both amps side by side. A close
friend of mine and I have been having a
blast listening to his CS-40 driving a ’90s
Matchless 2x12 extension cabinet. Sitting
right next to this setup was his favorite
candy panel 1963 AC30 Top Boost combo.
For our sonic hijinks, we also had several
vintage and modern guitars on hand.
The Vox Vibe
We played the AC30 first because we
were both familiar with its seductive
sound (and touch). We also started with
the AC30 because we both agreed it
represents the first historical example
of a fast-response guitar amplifier. The
first guitar we plugged in was a great-sounding
2006 Les Paul. This combination
gave us a sound and tone that instantly
reminded us of Mike Campbell, longtime
lead guitarist for Tom Petty and the
Heartbreakers. Okay, that’s not a bad
thing is it? The AC30 loves to be set at
(or just slightly under) the point of breakup.
This is where that opening chord to
“A Hard Day’s Night” sounds like a choir!
Though the AC30 has a healthy output,
there is a point where you get a creamier
distorted tone as you raise the amp’s
volume control. Cranking the volume
from there won’t actually make the amp
any louder—that’s where the output-tube
compression comes into play.
Going Mad
Moving along, my friend and I then
switched amps and set the CS-40’s controls
to yield a clean loud volume. Wow!
We immediately noticed that the CS-40
was producing an amazing shift in distortion
texture and character as we dug
hard into the strings. The resulting effect
was very refreshing. By varying our pick
attack, we could play the same two notes
and produce a sound that was quite
like a trained human voice going from a
soft whisper to a scream. This particular
sound was more akin to a solo singing
voice, whereas the AC30 sounded like
the aforementioned choir—a different
sound entirely!
Both amps are a joy to play because of
their speedy response and touch-sensitivity.
But they also have several differences.
For one thing, AC30s (and other Vox
models, come to think of it) will not do
jazz guitar much justice, in my experience.
This is because the Vox’s midrange frequencies
are voiced higher in comparison
to Fenders and other popular amps. Now,
the CS-40 can do jazz sounds incredibly
well, and it’s the only modern design I’ve
played that can nail that old mid-1950s
jazz guitar tone that Herb Ellis achieved
with the Oscar Peterson Trio.
Here’s the kicker: Moving into distortion—
from slightly dirty to heavily saturated
tones—is a walk in the park for
the CS-40. Sonically, it’s an extremely
versatile, Swiss Army-knife amplifier, and
we had serious fun dialing up an array of
distortion textures.
While comparing the AC30 to the CS-40, I
realized that vintage amps were designed
to be “clean.” In the old days, it was common
for an amplifier company to warn you
in the owner’s manual that if you heard
any distortion, the amp was too loud and
you should turn it down. Compare that to
the CS-40, which is designed to produce
a full spectrum of tones, from sparkling
clean to massively distorted. These two
models illustrate how amp circuitry has
evolved over the years to keep pace with
guitarists’ demands.
Next month, I’ll be back with more
gear adventures. Meanwhile, thanks to
my friend, Milton Reder, owner of Rear
Window Recording Services in Brookline,
Massachusetts, for giving us beyond-generous
use of his world-class facilities,
and for providing the instruments and
amplifiers we used for this month’s sonic
explorations.
Dean Farley
The chief designer of “Snake Oil Brand Strings” (snakeoilstrings.com), Dean Farley has influenced contemporary string design and is a great source of guitar, amp, and gear lore.
“Practice Loud”! How Duane Denison Preps for a New Jesus Lizard Record
After 26 years, the seminal noisy rockers return to the studio to create Rack, a master class of pummeling, machine-like grooves, raving vocals, and knotty, dissonant, and incisive guitar mayhem.
The last time the Jesus Lizard released an album, the world was different. The year was 1998: Most people counted themselves lucky to have a cell phone, Seinfeld finished its final season, Total Request Live was just hitting MTV, and among the year’s No. 1 albums were Dave Matthews Band’s Before These Crowded Streets, Beastie Boys’ Hello Nasty, The Miseducation of Lauryn Hill, Korn’s Follow the Leader, and the Armageddonsoundtrack. These were the early days of mp3 culture—Napster didn’t come along until 1999—so if you wanted to hear those albums, you’d have to go to the store and buy a copy.
The Jesus Lizard’s sixth album, Blue, served as the band’s final statement from the frontlines of noisy rock for the next 26 years. By the time of their dissolution in 1999, they’d earned a reputation for extreme performances chock full of hard-hitting, machine-like grooves delivered by bassist David Wm. Sims and, at their conclusion, drummer Mac McNeilly, at times aided and at other times punctured by the frontline of guitarist Duane Denison’s incisive, dissonant riffing, and presided over by the cantankerous howl of vocalist David Yow. In the years since, performative, thrilling bands such as Pissed Jeans, METZ, and Idles have built upon the Lizard’s musical foundation.
Denison has kept himself plenty busy over the last couple decades, forming the avant-rock supergroup Tomahawk—with vocalist Mike Patton, bassist Trevor Dunn (both from Mr. Bungle), and drummer John Stanier of Helmet—and alongside various other projects including Th’ Legendary Shack Shakers and Hank Williams III. The Jesus Lizard eventually reunited, but until now have only celebrated their catalog, never releasing new jams.
The Jesus Lizard, from left: bassist David Wm. Sims, singer David Yow, drummer Mac McNeilly, and guitarist Duane Denison.
Photo by Joshua Black Wilkins
Back in 2018, Denison, hanging in a hotel room with Yow, played a riff on his unplugged electric guitar that caught the singer’s ear. That song, called “West Side,” will remain unreleased for now, but Denison explains: “He said, ‘Wow, that’s really good. What is that?’ And I said, ‘It’s just some new thing. Why don’t we do an album?’” From those unassuming beginnings, the Jesus Lizard’s creative juices started flowing.
So, how does a band—especially one who so indelibly captured the ineffable energy of live rock performance—prepare to get a new record together 26 years after their last? Back in their earlier days, the members all lived together in a band house, collectively tending to the creative fire when inspiration struck. All these years later, they reside in different cities, so their process requires sending files back and forth and only meeting up for occasional demo sessions over the course of “three or four years.”
“When the time comes to get more in performance mode, I have a practice space. I go there by myself and crank it up. I turn that amp up and turn the metronome up and play loud.” —Duane Denison
the Jesus Lizard "Alexis Feels Sick"
Distance creates an obstacle to striking while the proverbial iron is hot, but Denison has a method to keep things energized: “Practice loud.” The guitarist professes the importance of practice, in general, and especially with a metronome. “We keep very detailed records of what the beats per minute of these songs are,” he explains. “To me, the way to do it is to run it to a Bluetooth speaker and crank it, and then crank your amp. I play a little at home, but when the time comes to get more in performance mode, I have a practice space. I go there by myself and crank it up. I turn that amp up and turn the metronome up and play loud.”
It’s a proven solution. On Rack—recorded at Patrick Carney’s Audio Eagle studio with producer Paul Allen—the band sound as vigorous as ever, proving they’ve not only remained in step with their younger selves, but they may have surpassed it with faders cranked. “Duane’s approach, both as a guitarist and writer, has an angular and menacing fingerprint that is his own unique style,” explains Allen. “The conviction in his playing that he is known for from his recordings in the ’80s and ’90s is still 100-percent intact and still driving full throttle today.”
“I try to be really, really precise,” he says. “I think we all do when it comes to the basic tracks, especially the rhythm parts. The band has always been this machine-like thing.” Together, they build a tension with Yow’s careening voice. “The vocals tend to be all over the place—in and out of tune, in and out of time,” he points out. “You’ve got this very free thing moving around in the foreground, and then you’ve got this very precise, detailed band playing behind it. That’s why it works.”
Before Rack, the Jesus Lizard hadn’t released a new record since 1998’s Blue.
Denison’s guitar also serves as the foreground foil to Yow’s unhinged raving, as on “Alexis Feels Sick,” where they form a demented harmony, or on the midnight creep of “What If,” where his vibrato-laden melodies bolster the singer’s unsettled, maniacal display. As precise as his riffs might be, his playing doesn’t stay strictly on the grid. On the slow, skulking “Armistice Day,” his percussive chording goes off the rails, giving way to a solo that slices that groove like a chef’s knife through warm butter as he reorganizes rock ’n’ roll histrionics into his own cut-up vocabulary.
“During recording sessions, his first solo takes are usually what we decide to keep,” explains Allen. “Listen to Duane’s guitar solos on Jack White’s ‘Morning, Noon, and Night,’ Tomahawk’s ‘Fatback,’ and ‘Grind’ off Rack. There’s a common ‘contained chaos’ thread among them that sounds like a harmonic Rubik’s cube that could only be solved by Duane.”
“Duane’s approach, both as a guitarist and writer, has an angular and menacing fingerprint that is his own unique style.” —Rack producer Paul Allen
To encapsulate just the right amount of intensity, “I don’t over practice everything,” the guitarist says. Instead, once he’s created a part, “I set it aside and don’t wear it out.” On Rack, it’s obvious not a single kilowatt of musical energy was lost in the rehearsal process.
Denison issues his noisy masterclass with assertive, overdriven tones supporting his dissonant voicings like barbed wire on top of an electric fence. The occasional application of slapback delay adds a threatening aura to his exacting riffage. His tones were just as carefully crafted as the parts he plays, and he relied mostly on his signature Electrical Guitar Company Chessie for the sessions, though a Fender Uptown Strat also appears, as well as a Taylor T5Z, which he chose for its “cleaner, hyper-articulated sound” on “Swan the Dog.” Though he’s been spotted at recent Jesus Lizard shows with a brand-new Powers Electric—he points out he played a demo model and says, “I just couldn’t let go of it,” so he ordered his own—that wasn’t until tracking was complete.
Duane Denison's Gear
Denison wields his Powers Electric at the Blue Room in Nashville last June.
Photo by Doug Coombe
Guitars
- Electrical Guitar Company Chessie
- Fender Uptown Strat
- Taylor T5Z
- Gibson ES-135
- Powers Electric
Amps
- Hiwatt Little J
- Hiwatt 2x12 cab with Fane F75 speakers
- Fender Super-Sonic combo
- Early ’60s Fender Bassman
- Marshall 1987X Plexi Reissue
- Victory Super Sheriff head
- Blackstar HT Stage 60—2 combos in stereo with Celestion Neo Creamback speakers and Mullard tubes
Effects
- Line 6 Helix
- Mantic Flex Pro
- TC Electronic G-Force
- Menatone Red Snapper
Strings and Picks
- Stringjoy Orbiters .0105 and .011 sets
- Dunlop celluloid white medium
- Sun Studios yellow picks
He ran through various amps—Marshalls, a Fender Bassman, two Fender Super-Sonic combos, and a Hiwatt Little J—at Audio Eagle. Live, if he’s not on backline gear, you’ll catch him mostly using 60-watt Blackstar HT Stage 60s loaded with Celestion Neo Creambacks. And while some boxes were stomped, he got most of his effects from a Line 6 Helix. “All of those sounds [in the Helix] are modeled on analog sounds, and you can tweak them endlessly,” he explains. “It’s just so practical and easy.”
The tools have only changed slightly since the band’s earlier days, when he favored Travis Beans and Hiwatts. Though he’s started to prefer higher gain sounds, Allen points out that “his guitar sound has always had teeth with a slightly bright sheen, and still does.”
“Honestly, I don’t think my tone has changed much over the past 30-something years,” Denison says. “I tend to favor a brighter, sharper sound with articulation. Someone sent me a video I had never seen of myself playing in the ’80s. I had a band called Cargo Cult in Austin, Texas. What struck me about it is it didn’t sound terribly different than what I sound like right now as far as the guitar sound and the approach. I don’t know what that tells you—I’m consistent?”
YouTube It
The Jesus Lizard take off at Nashville’s Blue Room this past June with “Hide & Seek” from Rack.
PG contributor Tom Butwin takes a deep dive into LR Baggs' HiFi Duet system.
LR Baggs HiFi Duet High-fidelity Pickup and Microphone Mixing System
HiFi Duet Mic/Pickup System"When a guitar is “the one,” you know it. It feels right in your hands and delivers the sounds you hear in your head. It becomes your faithful companion, musical soulmate, and muse. It helps you express your artistic vision. We designed the Les Paul Studio to be precisely the type of guitar: the perfect musical companion, the guitar you won’t be able to put down. The one guitar you’ll be able to rely on every time and will find yourself reaching for again and again. For years, the Les Paul Studio has been the choice of countless guitarists who appreciate the combination of the essential Les Paul features–humbucking pickups, a glued-in, set neck, and a mahogany body with a maple cap–at an accessible price and without some of the flashier and more costly cosmetic features of higher-end Les Paul models."
Now, the Les Paul Studio has been reimagined. It features an Ultra-Modern weight-relieved mahogany body, making it lighter and more comfortable to play, no matter how long the gig or jam session runs. The carved, plain maple cap adds brightness and definition to the overall tone and combines perfectly with the warmth and midrange punch from the mahogany body for that legendary Les Paul sound that has been featured on countless hit recordings and on concert stages worldwide. The glued-in mahogany neck provides rock-solid coupling between the neck and body for increased resonance and sustain. The neck features a traditional heel and a fast-playing SlimTaper profile, and it is capped with an abound rosewood fretboard that is equipped with acrylic trapezoid inlays and 22 medium jumbo frets. The 12” fretboard radius makes both rhythm chording and lead string bending equally effortless, andyou’re going to love how this instrument feels in your hands. The Vintage Deluxe tuners with Keystone buttons add to the guitar’s classic visual appeal, and together with the fully adjustable aluminum Nashville Tune-O-Matic bridge, lightweight aluminum Stop Bar tailpiece, andGraph Tech® nut, help to keep the tuning stability nice and solid so you can spend more time playing and less time tuning. The Gibson Les Paul Studio is offered in an Ebony, BlueberryBurst, Wine Red, and CherrySunburst gloss nitrocellulose lacquer finishes and arrives with an included soft-shell guitar case.
It packs a pair of Gibson’s Burstbucker Pro pickups and a three-way pickup selector switch that allows you to use either pickup individually or run them together. Each of the two pickups is wired to its own volume control, so you can blend the sound from the pickups together in any amount you choose. Each volume control is equipped with a push/pull switch for coil tapping, giving you two different sounds from each pickup, and each pickup also has its own individual tone control for even more sonic options. The endless tonal possibilities, exceptional sustain, resonance, and comfortable playability make the Les Paul Studio the one guitar you can rely on for any musical genre or scenario.
For more information, please visit gibson.com.
Introducing the Reimagined Gibson Les Paul Studio - YouTube
The two pedals mark the debut of the company’s new Street Series, aimed at bringing boutique tone to the gigging musician at affordable prices.
The Phat Machine
The Phat Machine is designed to deliver the tone and responsiveness of a vintage germanium fuzz with improved temperature stability with no weird powering issues. Loaded with both a germanium and a silicon transistor, the Phat Machine offers the warmth and cleanup of a germanium fuzz but with the bite of a silicon pedal. It utilizes classic Volume and Fuzz control knobs, as well as a four-position Thickness control to dial-in any guitar and amp combo. Also included is a Bias trim pot and a Kill switch that allows battery lovers to shut off the battery without pulling the input cord.
Silk Worm Deluxe Overdrive
The Silk Worm Deluxe -- along with its standard Volume/Gain/Tone controls -- has a Bottom trim pot to dial in "just the right amount of thud with no mud at all: it’s felt more than heard." It also offers a Studio/Stage diode switch that allows you to select three levels of compression.
Both pedals offer the following features:
- 9-volt operation via standard DC external supply or internal battery compartment
- True bypass switching with LED indicator
- Pedalboard-friendly top mount jacks
- Rugged, tour-ready construction and super durable powder coated finish
- Made in the USA
Static Effectors’ Street Series pedals carry a street price of $149 each. They are available at select retailers and can also be purchased directly from the Static Effectors online store at www.staticeffectors.com.