Famous tube amps from companies like Fender, Marshall, Vox, and others have come to define the sound of virtually all electric-guitar music. To varying degrees, we know that these amps sound different from each other—and we might even know some basic specs, like what kind of tubes different models use, and maybe some details about stock speakers. But it can be hard to understand some of the finer reasons why these amps sound different from each other.
Once we plug in our guitars, all sorts of electrical processes happen as our signal makes its way from the input jack on through the unique set of electrical components that give each amp its signature sound and on through to the speaker. What goes on inside of our amp once we've plugged in our guitar? And what makes one amp louder than the next?
Although there's much, much more to cool amp tones than could possibly be discussed in an introductory piece like this, there are a lot of basics in common between the various brands and types of circuits, particularly with regard to how tubes (preamp and power), watt ratings, and speakers work. Because of this, we can learn a lot from a more specific example. To that end, let me tell you a little story about one of my favorite amps.
Dan Formosa found his 1960 Vox AC15's international voltage selector was incorrectly rated, and avoided overloading the amp's original tubes after doing an extensive online search and calculations.
I recently had a revelation about a beautiful, fawn-Tolex-covered, circa 1960 Vox AC15 that I bought from a dealer in the U.K. (full disclosure: many years ago) and finally got around to restoring. That meant replacing the electrolytic capacitors before daring to turn it on, since they have a life span. The AC15's international voltage selector on the far right of the control panel has settings for 115, 160, 205, 225 and 245 volts. I expected my U.S. wall voltage to be a few volts higher than its nominal 120, but still within reason for powering the amp at the 115 setting. However, the readings I got when checking the internal voltages were sky high. Its original Mullard EL84 power tubes were being overloaded at almost 17 watts, while 12 watts is the designated maximum and 14 watts would be pushing my luck. A few Variac voltage experiments over the next few days, along with some obsessively created Excel calculations and charts, verified that a wall voltage of 105 would be more appropriate. A week of deep Google searches and an eventual exclamation of "Thank you online discussion boards!" uncovered the problem. While there were no markings on my AC15's power transformer, chassis photos of two exact same amps and transformers showed the power transformer input terminals labeled as 105, 145 (not connected, like on mine), 160, 205 and 245. Despite the control panel's graphics, the amp never had a 115 volt option. That setting connects to the power transformer's 105 volt terminal. Furthermore, the 225 and 245 selections were both connected to the 245 terminal. Apparently when Vox printed that panel in 1960, they were just kidding.
My near-miss chance of seeing the power tubes glow like it's Christmas led me to think about the journey electrons take through an amp, combining forces emanating from your wall and your guitar to power the speaker. And what it means to overload a tube, as I came close to doing. Did you ever wonder why a single EL84 tube is rated at 12 watts, but powers a 5 watt amp? Or why two EL84s power a 15 watt amp? And why, when adding two more to the set, four will produce 30 watts? Let's explore watts and electrons, and investigate how exactly they travel in your amp, from power tube to speaker.
Identifying the limit of a tube or a speaker in watts means defining the maximum amount of energy per second it can safely handle.
Power In Vs. Power Out
When discussing power and watts, keep in mind that your tube amp isn't primarily functioning as a guitar amplifier. It's more of a space heater that produces sound. Here's a question that Steven Fryette, of Fryette Amplification and Sound City Amps, is frequently asked: "How is this a 30-watt amp when it says 100 watts on the back?" The short answer: An amplifier is filled with components that consume power that never gets to the speaker. Power transformers get warm, the pilot light and heating filaments within the tubes suck up a lot of juice—the preamp tubes and power tubes are approximately only 50 percent efficient— and there's heat being produced by the output transformer. Power-wise, the speaker operates mostly as a heat sink. A tube amp is therefore far less efficient than you might guess. More than 99 percent of the incoming power ends up as heat. Less than 1 percent exits as sound. To help understand how all that power turns into hardly any sound, we'll discuss EL84 tubes—although any power tube could serve as an example, since all are guided by the same physics.
At the center of the tube, preamp tubes included, is a cathode, a small tube that emits a cloud of electrons when heated. The plate—that's the gray or silver metal wall that you see when looking through the tube's glass—contains a high-voltage, electron-attracting DC charge. The signal from your pickups is sent to the preamp tube's grid, and eventually to the power tube's grid. The grid is a wrap of wires within the tube surrounding the cathode. The grid regulates the flow of electrons traveling from the cloud to the plate. In a class A or class AB amplifier (more on that to come), the grid allows electrons to flow even when at rest, or "idle," meaning electrons are on the move even with no guitar signal on the grid. Start to play and an increase and decrease of electron flow perfectly mirrors the guitar's signal. Electron flow is also known as current.
An RCA 6BQ5, aka EL84, tube consumes 12 watts, but like all power tubes it produces about half of that in power. The EL84 is a staple in the world of power tubes, typically associated with Vox and Marshall amps.
So, what's a watt? A watt is a rate of power—one joule per second, with a joule being a unit of energy—and can be calculated by multiplying volts times amps. Therefore, a watt is a measure of energy per second. Identifying the limit of a tube or a speaker in watts means defining the maximum amount of energy per second it can safely handle. Given the calculation for wattage (volts x amps = watts), you can see that increasing voltage, amps, or both will increase wattage.
Defining that power relationship one step further, what's an amp? It's short for "ampere" (not, in this case, "amplifier"). An amp holds the "per second" dimension of time seen in watts. In a classic plumbing analogy, volts are equivalent to water pressure, while amps measure the flow rate of that water. Too much of either will electrically flood your tube or speaker.
Water flow and pressure may not be a great analogy, because what really results when a tube or speaker becomes overloaded with watts is too much heat. But to complete the water analogy, resistance (or the related term "impedance" … we'll get to that, too) is like reducing the diameter of the water pipe. It's therefore fair to think of a tube as an electron pump, continually circulating electrons.
The Secret Life of Watts and Tubes
Electrons bombarding the plate too quickly will cause it to glow red and radically shorten the life of your tubes.
Receiving the up-and-down voltage waves of a guitar signal, the grid controls the flow of electrons, holding some back or unleashing them in accordance with whether you're delicately picking or bashing. The high level of positive, electron-attracting DC voltage on the screen grid and plate elements determines the amount of electrons pulled from the cathode. (Essentially determining how loud your amp gets.) Tubes, however, have limits, both on the rate at which the cathode can produce electrons and on the rate at which the plate will accept them.
Try to attract more electrons than the cathode can emit and you'll reach saturation. Flood the plate with too many electrons and you'll exceed its maximum dissipation level, overheating the tube. Set the grid's bias voltage too negative and you'll reach cutoff, a point where the negative swing of the guitar signal's sine wave will suddenly prevent any further electron flow from the cathode.
Picture your guitar's signal as a simple sine wave—a pure A440, for instance. Turning the volume up high can produce too much voltage swing on the tube's grid, and then on the plate, to be handled cleanly. The result you hear will be the sound of a sine wave being abruptly flattened at the high and low points of the wave. You may be perfectly happy with that level of distortion. But what if we overload a tube in a less friendly manner?
Class Acts
Amplifier circuits are designed to use tubes in different ways. The circuits we are primarily concerned with in tube amplifiers are class A and class AB. However understanding classes A and B helps to explain class AB, a hybrid of the two. So….
How Class A Circuits Catch a Wave
In a class A amp circuit, the power tube constantly carries the entire signal. So, a tube operating in a class A design is always conducting at maximum dissipation—full on—whether you're playing guitar or not.
Amplifiers with one power tube—single-ended amplifiers—operate in class A. That one power tube carries the entire 360-degree span of the sine wave, measured along a horizontal axis in degrees. The bias is set so that the amp idles along the vertical (Y-axis) center of the sine wave, evenly positioned between the peaks and valleys. That means the tube is always conducting at maximum dissipation—that it's always on full whether you're playing or not. When playing, the guitar signal creates peaks and valleys in the sine wave. Many, actually. The peak of the sine wave increases current flow; the valley of the wave reduces it.
This flow diagram shows how an EL84's power comes from electrons flowing from ground, through the tube, through the output transformer, and back to ground. It's a cycle.
An EL84 power tube can produce approximately 5 watts in a single-ended amp. Therefore, you would think two EL84 tubes would produce 10 watts. And that's true: Power tubes can be configured in parallel to double the output power. Consider, for instance a Gibson GA-9 amp, which puts two 6V6 tubes in parallel. It's done, but not often. Why? Because a class AB configuration can produce more than double the power output from two power tubes. But before we get to that….
Make Some Noise, Class B
In a class B amp, each tube carries exactly half of the signal. Because the transfer of the signal from one tube to the other is never perfect, it creates crossover distortion.
In a class B amp, two power tubes share the sine wave. One conducts the first 180 degrees of the wave, and the other conducts the second. It's a push-pull arrangement. Unlike in a class A amp, each tube is at work only half the time. This allows each tube to be pushed further, into higher amplification, during the time it's conducting. To take advantage of that rest time, voltages at the plates can be higher, as can the signals going into the power tubes' grids. If a single EL84 tube can deliver 5 watts in class A, it can deliver twice that in class B during its half of the sine wave. Two tubes, therefore, will deliver four times the power, in theory. In practice, it may be less. Another advantage of a class B circuit is that at idle, neither tube is conducting, so it's a very efficient configuration for power consumption and for tube life.
All of that would be great for a guitar amplifier if the transition from one tube to the other occurred instantaneously. It doesn't. As the sine wave moves from positive to negative and back to positive, there's a delay—a misalignment in the transition between the tubes. The delay creates crossover distortion. Steven Fryette's description: "Crossover distortion can create a fizzy sound in the amplifier, [because] one tube is turned off before the other is fully turned on." And that, in a nutshell, is why class B isn't a common option for guitar amps. Enter class AB.
Class AB—Double the Fun
A class AB circuit solves the crossover distortion problem by having two (or four) tubes overlap responsibilities. Each tube, or each pair of tubes, carries more than half of the 360-degree signal of the sine wave.
In a class AB circuit, two power tubes share the responsibility of conducting the sine wave, similar to class B, but with some overlap. The tubes are set up so that one starts conducting before the other finishes, so each tube conducts for more than 180 degrees of the sine wave. This eliminates issues with the transition from one tube to the other. While not as powerful or efficient as a class B circuit, it's close—and the reason two EL84 tubes can deliver 15 watts in class AB amplifiers.
But if one EL84 delivers 5 watts and two can boost that to 15 watts, why do four only deliver 30 watts? Because in an AB amplifier with four power tubes, the tubes work together in two pairs, with each set delivering exactly twice the power of one tube. In a Vox AC30, for example, each pair of parallel EL84s creates 10 watts. It then puts the pairs in class AB configuration, doubling the output of a two-power-tube-amplifier, like the Vox AC15, from 15 to 30 watts. The diagram here explains that in greater detail.
In a class AB circuit, each power tube get a chance to rest half the time an amp is operating. Because of that, power tubes can be pushed harder when they are conducting.
The Output Transformer Takes Sides
The output transformer converts high voltage and low current on the primary side—which is to say, the tube side—of the circuit to enough low voltage and high current on the secondary—or speaker—side to drive a speaker. An output transformer's primary side is rated in ohms, but ohms in impedance, not resistance. The difference is that impedance takes into account that an AC signal is involved, since resistance will vary significantly depending on the frequency. (Frequency is the number of oscillations per second in the AC signal.) The impedance determines the rate of flow of electrons, with higher impedance being more restrictive.
The Alliance: Speakers and Transformers
It's important to match a speaker's impedance rating with the output transformer, because, interestingly (and maybe somewhat surprising), the impedance on the primary side of the output transformer will change based on the impedance of the speaker you connect on the secondary side. If you connect a speaker rated at half the impedance—for example, put a 4-ohm speaker in place of an 8-ohm speaker—the impedance seen by the tubes will be cut in half. Twice the current will flow on both the tube side and the primary side. The 4-ohm speaker will be louder but can lead to trouble. Your power tubes or output transformer can overheat. It's not risky, however, to put a 16-ohm speaker in place of an 8-ohm speaker, although it won't sound as loud. In discussing this with John Paice at speaker manufacturer Celestion in Ipswich England, he had some simple advice: "Don't do it." Best practice is to match the speaker with the output transformer.
Doubling the wattage of a 15-watt amplifier will increase perceived loudness by 23 percent, not double it. And so, a 5-watt amp would sound 71 percent as loud as a 15-watt amp.
In terms of guitar amplification, we measure—and hear—power and loudness along a logarithmic curve. Doubling the wattage going into a speaker results in a 3 dB increase. At 3 dB more, we're not doubling loudness. It's approximately a 23 percent increase in volume. You can therefore expect a 30-watt amplifier to sound 23 percent louder than a 15 watt amplifier. And a 5-watt amplifier will be 71 percent as loud as a 15-watter.
If mixing speakers in a multi-speaker cabinet, be conscious of each speaker's impedance rating (they should match) and also of each speaker's sensitivity rating, found on its spec sheet. (Sensitivity is usually determined with a microphone connected to a sound level meter placed one meter in front of the speaker. The result is expressed in dB.) Advice from Celestion's Paice: "If mixing speakers, try to keep their sensitivity rating within 3 dB of each other, because any more than that will become noticeable. The more sensitive speaker will dominate the blend."
What’s with Speaker Wattage
A large speaker magnet does double-duty. It will hold the voice coil more firmly, producing more bass. It also acts as a larger heat sink. A Celestion G12M rated at 25 watts incorporates a 35-ounce magnet. A G12H at 30 watts incorporates a 50-ounce magnet. "A bigger lump of metal is better at dissipating heat, so you can put more power into it," explains Paice. In addition to heat, too much power into a speaker can potentially result in too much cone movement, damaging the cone and its surround, and possibly resulting in failure. Nonetheless, a 50- or 100-watt Marshall amp pushing a set of four Celestion 25-watt speakers is a classic sound, employed by Hendrix, Clapton, Page, Slash, and many other guitar heroes. Running multiple speakers in a cab reduces the punishment any single speaker must take. And, of course, using a high-power-rated speaker with a low-power amp can also net good sonic results. "Some people think that you have to put as much power into a speaker as it will take," says Paice, "but you can get lots of breakup with a high-power speaker using just a lunchbox-size amp."
Bactrian Amps, Anyone?
You may be thinking, okay, if doubling watts into a speaker doesn't double the loudness, I'll just use two amplifiers. No, no, no—the same principles apply. Since we hear logarithmically, two 15-watt amplifiers will give you the same output as a single 30-watt amplifier. It's an increase, but not double.
I like going back to the classic 1959 publication on sound and amplification, Basic Audio, Vol 1. by Norman H. Crowhurst. He shows an illustration of two crying babies in a twin stroller, comparing their loudness with one crying baby in a stroller. Two babies are louder, but not twice as loud. So while that physics phenomenon may not work to your advantage as a guitar player, think of how grateful you would be if you were the parent of twins.
Peeling the Onion
Let's take a deeper look inside tubes, output transformers, and speakers.
This diagram shows the ve components within an EL84 tube. Note the minute distance between the grid and cathode. That's the open range for negative-charged electrons.
Under the Glass
Ever wonder what's behind the glass of your amp's tubes? Well, there's a lot going on in your average pentode or triode—electrons charging around, hitting walls, held at bay. Let's examine an EL84, which is a pentode, as is an EL34 and many other power tubes. That means five elements are at work within the tube (not counting the filament, the heating element tucked inside the cathode). Schematic diagrams like the one below portray tubes as if the cathode is on one side of the glass and electrons flow in a straight line through the tube, with all elements evenly spaced.
In reality, the cathode sits vertically in the center of the tube, and its electrons flow outward. When the cathode is heated, a "space charge" of electrons—a cloud of negative-charged particles—form around it like swarming microscopic bees. Because opposites attract, they are instantly drawn to the high positive-DC voltage of the plate. But the grid stops them. The grid is a wrap of thin wires encircling the cathode that carry your guitar's signal. The grid's at-rest charge appears negative to the cathode, slowing the electron flow. There are two ways for the grid to assume that negative appearance, depending on an amplifier's design: Either the grid is connected to a small negative charge or the cathode has a small positive charge. Electrons don't care which method is used. Just ask 'em.
The cathode, grid, and plate are elements common to triodes (three-element preamp tubes, like a 12AX7) and pentodes. The two additional elements inside the pentode are the screen grid and the suppressor grid. Like the guitar-signal grid, they are wraps of thin wire with mostly open areas that allow flying electrons to reach the plate without being blocked. And like the plate, the screen grid carries a high electron-attracting DC voltage, but its voltage, unlike the plate, is consistent, whereas plate voltage will vary with the signal.
The suppressor grid, the outermost wrap of wire closest to the plate, is connected to the cathode and its job is to repel electrons, which hit the plate and bounce off. The suppressor grid sends them back to the plate to avoid power loss. Beam tetrode tubes like the 6V6, which have four elements, incorporate metal plates that serve a function similar to a pentode's suppressor grid, working to keep the electrons in place.
This illustration shows the three grids plus the cathode and plate in a typical pentode tube.
Are Your Tubes Biased?
Sure, you've heard the term bias, but what is it and what does it do for your amplifier? Bias refers to the amount of negative charge the cathode detects on the grid, and it is set to keep the electron flow in check at a happy, medium level. Too negative and not enough electrons will flow when you're playing, so your amp won't produce enough volume and will sound anemic. Too positive you'll be bombarding the plate with too many electrons and overheating it, producing a warm red glow that you don't ever want to see in a tube. At that point, its lifespan could be measured in minutes.
The wattage a tube's plate receives can be determined by multiplying the rate at which electrons flow from the cathode to the plate times the voltage at the plate. The former is measured in amps, and in a cathode-biased amplifier can be calculated by knowing the value of the resistor connected between the cathode and ground, and the voltage drop across the resistor (the "drop" is the voltage measured between one end of the resistor and the other). An EL84 is designed to receive up to 12 watts maximum, and this or just below becomes the target when adjusting the tube's bias. So there you go.
The Many Tasks of Output Transformers
In the main story, we talked about how the output transformer wrangles voltage and works to impede and control the flow of electrons toward the speaker. That's not all it does, but in the process of doing that, it also blocks high voltage DC from streaming through the circuit, which is why you won't get electrocuted touching your speaker connections.
On the primary, or tube, side, the output transformer's impedance rating should more or less match the required impedance for the power tube or tubes being used. That impedance is measured in ohms, on the order of 4,500 ohms for a single EL84 tube, and 8,000 for two in class AB. An output transformer designed for an impedance lower than what the tubes want will lead to too much current flow, overloading the transformer, the tubes, or both. And soon they're kaput.
High voltage on the power tubes' plates also comes from the output transformer, via the rectifier tube or circuit. And that DC voltage is regulated by a large filter capacitor to help smooth out any ripples in voltage.
Yes, Speakers Are Sensitive
There's a rating for how reactive a speaker is to a signal that's typically called sensitivity. Awwww…. A speaker's sensitivity is measured by sending a 1-watt, 1-kHz signal into the speaker and measuring the loudness at 1 meter away.
If 1 watt sounds low, remember that power efficiency of a speaker is also surprisingly low. Most of the power going into a speaker is dissipated as heat. According to Celestion's John Paige, 97 percent of input power becomes heat, and only 2 to 3 percent converts to sound. Years ago, regulations required that speaker voice coils include a fire retardant, because occasionally they'd ignite onstage.
Since speaker sensitivity varies, an easy way to increase or decrease the loudness of an amplifier is to simply change speakers. But here's a quick lesson in sound physics. We measure loudness in decibels, or dB, a unit of sound pressure level, or SPL. Similar to the way we rate the magnitude of earthquakes, decibels are based on a logarithmic scale. So, check out this chart. It illustrates the perceived loudness you might expect for speakers of varying decibels.
And remember, our ears work in a surprising way. To perceive sound as being twice as loud requires an increase of 10 times the sound pressure, or 10 dB. Therefore 70 dB will sound twice as loud as 60 dB, and 80 dB will sound four times as loud as 60 dB. For reference, casual conversation is around 60 dB and 120 dB is jackhammer painful.
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The Brian May Gibson SJ-200 12-string in the hands of the artist himself.
Together, with a legion of Vox AC30s and a few effects, May and his homemade Red Special have created some of the richest, most glorious guitar sounds that have ever been documented. It is with that guitar in his hands that he’s crafted everything from his velveteen guitar orchestras to his frenetic riffs and luxuriant harmonies to his effortlessly lyrical leads, which matched the dramatic melodic motifs of Freddie Mercury in one of the most dynamic lead singer/guitarist pairings in rock music.
Although it has a smaller role in his body of work, overshadowed by such an accomplished, prolific electric guitar C.V., May’s acoustic playing is a major part of the story of his music. His bold opening strums of “Crazy Little Thing Called Love” are some of the most recognizable D-major chords in the classic-rock canon, and his supportive work on “Spread Your Wings” adds lush dimension between Freddie Mercury’s arpeggiated piano chords and his rich electric guitarmonies. The multi-tracked 12-string figure that opens “’39”—his “cosmic folk song”—is among his most recognizable.
It’s a surprise, then, that when I ask May about the acoustic guitars used while recording with Queen, the most notable is his Hallfredh acoustic, a “cheap as hell” guitar from a virtually unknown brand. “My little old acoustic, which I swapped with my dear friend at school,” he reminisces. “The strings were so low on it that everything buzzed like a sitar. I capitalized on that and put pins on it instead of the bridge saddles, and you can hear that stuff on ‘The Night Comes Down’ [from Queen]. I used it all the way through Queen’s recordings, like on ‘Jealousy’ [from Jazz] years later and lots of things.” He also recalls his Ovation 12-string and some others, but the Hallfredh remains in the foreground of his acoustic memories.
The cosmic inlays on the Brian May SJ-200 represent the rock legend’s work in the field of astrophysics, in which he holds a PhD.
In recent years, May has been performing the 1975 ballad and emotional Mercury vehicle “Love of My Life,” which appears on A Night at the Opera, as an acoustic tribute to the late singer. May and his acoustic 12-string sit center stage each night as he leads the crowd through a heartwarming rendition of the song, joined at its climax by a video of Mercury. For that powerful, commanding moment, he’s relied on “a number of guitars we won’t mention, but it just came to the point where I’m thinking, ‘This isn’t sounding as good as I would like it to.’”
At one concert, a Gibson representative who was around piped up and offered to make him a guitar to his specs specifically for this piece. “I was surprised that they would notice me in the first place,” May recalls, “because part of me never grew up.” A surprising take from a rock star of such stature, but he explains, “I’m still a kid who was reading the Gibson catalogs and not able to afford anything, seeing the SGs and the Les Pauls and dreaming of being able to own a Gibson guitar. I now have a couple of the SGs, which I absolutely love, but, of course, I made my own guitar and I now have my own guitar company, so I went a different way. But to me this was a joy that they would offer to make me a guitar, which I could take out onstage.”
After building one for the guitarist, Gibson created a limited edition run of 100 instruments of the new model, called the Brian May SJ-200 12-string. Featuring a AAA Sitka spruce top with a vintage sunburst finish, AAA rosewood back and sides, a 2-piece AAA maple neck with walnut stringer, and a rosewood fretboard, it’s a top-of-the-line acoustic. The most noticeable feature on the SJ-200 is probably the string arrangement, which is flipped—as is most commonly found on Rickenbacker 12-strings—with the lower string above the higher string in each course. May has made that modification on other 12s, because he likes to string the high string first when fingerpicking. “You get an incredibly pure sound that way,” he points out. “‘Love of My Life’ is a good example—if it’s strung the other way, it sounds very different.”
On its pickguard, all seven of the other planets in our solar system are etched. The shaded one, close at hand, is Mercury, a tribute to the Queen singer.
May’s aesthetic customizations draw from his astrophysics work and add a personal sparkle to the large-bodied acoustic. The pickguard features a custom design with the seven other planets in the system, which is to say, not Earth. Mercury sits close at hand, a tribute to the singer. The fretboard and headstock include 8-point star inlays—to give a “more cosmic feeling”—that are made from agoya shell, as are the bridge inlays.
“It became a discussion about art and science, which I love,” May says of the design process. “That’s probably the biggest thread in my life, this path trodden, some people would say, between art and science. But I would say that they’re the same thing. So, I just tread among art and science.”
May’s own Gibson has already appeared in concert during the “Love of My Life” segment of Queen’s show, and occasionally for “’39.” On social media, where May stays active, many fans caught a glimpse of the guitar when he posted a new song for Christmas Eve. “I just wanted to say Merry Christmas, and that’s the way it came out,” he says. “It was incredibly spontaneous. I wanted it to be a gift. I didn’t want it to be, in any way, a way of advertising or making money or anything. It was just a Merry Christmas gift to whoever wants to listen to me.”
“It became a discussion about art and science, which I love,”
While that was one of the first things created with the new Gibson, he has more plans. “I’ve been playing around with it. In fact, we’ve been dropping the D,” he says, hinting at some future plans with guitarist-vocalist Arielle. “I have quite a few songs with the bottom D dropped. I haven’t normally played them acoustic or 12-string, but I’m discovering that some of that sounds really good. It gets such a lovely big clang and a big depth to it.”
Recently, May spent a great deal of time looking back as the band prepped the Queen I box set. The remixed, remastered, and very expanded version of their 1973 debut, Queen—they’ve added the “I” here—which was released last October, encompasses a rebuild of the entire record, plus additional takes, backing tracks, a version recorded specifically for John Peel’s BBC Radio 1 show, and a 1974 live concert recording from London’s Rainbow Theatre.
May says of his new Gibson: “To me, this was a joy that they would offer to make me a guitar."
Revisiting this early document over 50 years later, it’s amazing to hear how well-developed the guitarist’s sound already was—full of the propulsive riffs and harmonies that would become part of his signature. May concurs, “You go back into these tracks quite forensically, and I hear myself in the naked tracks and I think, ‘Wow, I didn’t realize that I could do that at that point.’ It must have happened very quickly.”
Reflecting on those formative times, he continues, “I think there’s a period of just exploding, knowing what it is in your head, and striving to make what you play match what’s in your head. But I see it in other people, too. Sometimes, I go back and listen to the first Zeppelin album, and they were pretty young when they made that. But I think, ‘My God, how did they get that far and so quick?’”
“I thought guitars do work as primary orchestral instruments, so that’s what I want to do.”
Before Queen, May had already recorded a two-part guitar solo on the song “Earth,” a late-’60s track recorded with his earlier band, Smile, which also featured future Queen drummer Roger Taylor. While that lead certainly points toward the ambition in May’s later work, its raw untamedness doesn’t quite show evidence of his ultimate precision. But he says he had it in mind from early on. “There weren’t any more tracks to do three parts” when they recorded with Smile, he says, “but I always dreamed of it. It goes back a long, long way to hearing harmonies in other ways from the Everly Brothers, from Buddy Holly and the Crickets, from all sorts of things that we were listening to when we were kids.
“I wanted to make the sound of an orchestra just using guitars, and there’s other little inspirations along the way,” he continues. “Jeff Beck was an inspiration because there’s that wonderful track, ‘Hi Ho Silver Lining,’ which Jeff hated. But there’s one bit where he double-tracks the solo and in just one point it breaks into a two-part harmony, probably by accident. I guess I should have asked him—damn well wish I had. But that sound echoed in my head, and I thought guitars do work as primary orchestral instruments, so that’s what I want to do. I could hear it in my head for a long time before I could make it actually happen.”
Brian May and his Red Special at a recent concert.
Photo by Steve Rose
Though the Queenrecording sessions gave the guitarist his first opportunity to explore the larger harmonized sections that would become part of his signature, many of the sounds on the record left the band dissatisfied. Recorded at Trident Studios in London, the young band could only afford to use the room during downtime. Over the course of four months, they had sessions, usually at night, with in-house producers John Anthony and Roy Thomas Baker, both early supporters. However, the Trident style and sound wasn’t what Queen had in their collective ears, and they’ve remained unhappy with the sonic quality of their debut all these years.
The drums were the band’s primary issue, which Taylor describes as having a “very dry, quite fat, dead sound.” May’s tone is recognizably his own. “Well, I’m a very pushy person,” he laughs. “But nevertheless, it was difficult for me, too. Because of this Trident style of recording, the intention was not to have room sound on it. I kind of pushed, I suppose, to have a mic on the back of the amp as well as the front. That gave me a bit more air. I did feel a little hampered and the change is more subtle on the guitar, but it’s there.
“Jeff Beck was an inspiration because there’s that wonderful track, ‘Hi Ho Silver Lining,’ which Jeff hated. But there’s one bit where he double tracks the solo and in just one point it breaks into a two-part harmony, probably by accident.”
“It’s funny because it changed radically as time went on,” he continues. “And I can remember by the time we got to Sheer Heart Attack, Roy is putting mics all over the room and miking up windows in the booth and whatever to get maximum room sounds. It’s certainly nice to go back and make everything sound the way we pretty much would’ve liked it to sound at the time.”
With Queen I out, a new Queen IIset is in the works, which May calls “a very different kettle of fish.” The drum sounds on their sophomore effort were more in line with the band’s original vision, but the dense layers of overdubs that famously appear on the record came at a cost. “I think it is the biggest step musically and recording-wise that we ever made,” says May. “But there’s a lot of congestion in there. There’s mud because of all this generation-loss stuff [caused by overdubs], and because we liked to saturate the tape, which seemed like a good idea at the time. It made it sound loud. But if you disentangle that and get the bigness in other ways, I think Queen II is going to sound massive.”
The AAA rosewood back and sides of May’s signature acoustic are stunning.
At 77 years old, May certainly seems to keep his schedule packed with music work—not to mention his animal advocacy and scientific endeavors. In May of last year, though, everything came to a halt when the guitarist suffered a stroke. “I couldn’t get a fork from the table to my mouth without it all going all over the place,” he recalls. “It was scary.” Luckily, things began turning around quickly. “After only a few days, it’s amazing what you can get back. By sheer willpower, you just start retraining your muscle.” Not quite a year on when we speak, May estimates he’s regained 95 percent of his abilities, which, he says, “is enough.
“The short answer is, ‘I’m good,’” he assures.
May is in great spirits and appears excited about all his recent projects, finished and in-progress alike. In this time of looking back on his earliest works, I ask him to think about his beginnings, when he would gaze at Gibson catalogs but had to build his own guitar out of necessity, because, as he points out, he “couldn’t afford anything else.”
So, what would young Brian May, stepping into an afterhours session at Trident, making his band’s debut, think about his new limited edition signature model Gibson acoustic? He takes a long pause. “It would have been …” he pauses again, “unthinkable.”
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In the ’80s, Peter Buck’s clean, chime-y arpeggios defined the sound of alt-rock to come. From R.E.M's start, his post-Roger McGuinn 12-string style served as the foundation for the band’s simple, plain-spoken approach, offering a fresh take on what an independent band could be and inspiring generations of artists to come. Buck not only found his sound quickly, he evolved throughout the band’s career. By the ’90s, R.E.M.’s sound had evolved to incorporate organic, acoustic textures, and eventually leaning into a glam- and grunge-inspired, distorted-guitar-focused sound on 1994’s Monster.
This episode is sponsored by Voodoo Lab.
In the case of Orange’s new Baby series entries, these possibilities exist in triplicate: the compact, highly controllable Gain Baby 100, Tour Baby 100, and Dual Baby 100 amps. These grab-and-go solid-state units with strong metal chassis are a mere 6 1/2 pounds, come with a durable shoulder bag for transport, and can be dropped atop a cabinet or into a rack. (These amps measure 12.8" x 3.13" x 7.68".) Each model has two radically different channels, guaranteeing versatility, plus a class A/B power stage for clarity and heavy lifting. They all offer the fat, midrange growl and the fast touch-sensitivity I associate with the classic, Orange sounds of players ranging from Peter Green to Slipknot’s Jim Root, which is perhaps a result of their single-ended JFET preamp stage.
I tested these Babies with a vintage Les Paul, a PRS Silver Sky SE, and a Zuzu custom with coil-splitting, to get a wide variety of tones. I also switched between a 1x12 cabinet with a G 12M Greenback and another with a 50-watt Eminence Red Coat Private Jack. Both cabs were 8 ohms, but the amps can also run 70 watts into 16 ohms. While the Celestion drilled down on nasty, Hendrix- and early ’70s-era voicings, the 50-watter really let the amps breathe in lush harmonic detail.
Each of the triplets has a footswitch option for channel and volume switching, an effects loop, and a balanced XLR out, and can be easily used with a DAW, cab sims, and IR captures. These units can also be switched for 100, 110, and 220 volts AC. Short take: I found a lot to like about these sonic siblings.
Gain Baby 100
While I’m not typically a high-gain player, I took to the Gain Baby 100 immediately, enjoying the edgy tone, responsiveness, sustain, and articulation in its dirty channel. Dirty offers gain, volume, presence, and 3-band EQ, plus the footswitchable volume has its own level control, and it delivers a stinging rock voice where chords hang and bloom. This channel’s real “dirty” secret is a toggle that can be flipped to “tight” mode, which functions like an additional EQ stage that polishes lows and focuses the mids, making them really singing and dimensional.
I initially viewed the clean channel on the Gain Baby and Tour Baby as pedal platforms, with just a volume control and bass and treble, but the clean side’s built-in, single-knob compressor pushes the Gain Baby’s volume and low-end character to the fore, conjuring memories of that ’70s uber-beast, the Sunn Beta Lead (and the Melvins’ King Buzzo). Ultimately, the Gain Baby 100 delivers very distinct and appealing bookends of heavy for just under 600 bucks.
Key: Dirty channel rhythm > dirty channel rhythm with tight switch engaged > dirty channel lead > dirty channel with tight switch lead > clean channel rhythm > clean channel lead
Tour Baby 100
The road-oriented Tour Baby seems the most versatile of the trio. The dirty channel has the same control panel as the dirty side of the Gain Baby, minus the tight switch. And while overall the amp seems to have a bit less gain, it’s still easy to get into Wayne Kramer territory by cranking up the gain control when you want to kick out the jams. Sweet, sustained tones were a snap to achieve by dialing back the guitar’s tone pots, riding the amp’s mid control high, setting treble to about 7 or 8, and dialing in the bass at 3.5 to 4. And, again, like the Gain Baby, the 3-band EQ offers plenty of range. If even more crunch is desired, the presence knob helps dial it in.
The Tour Baby’s clean channel also mimics the Gain Baby’s clean setup, but the compressor doesn’t lean into the low end like it does on the Gain Baby. It does, however, sculpt and define tones in a very appealing way, warming and pushing midrange. While I preferred the dirty channel here, my colleague Tom Butwin fell for the clean side, and his excellent demo video online is well worth watching. For me, this amp’s strength is that it stands on its legs and growls from the dirty side, and provides a characterful pedal platform on the clean side. All three amps, by the way, sound terrific with a reverb pedal, though less so at higher-gain settings.
Dual Baby
For players devoted to traditional British voicings, the Dual Baby may be the most enticing option, providing at least two recognizably classic sounds in one small, efficient package. Channel A is based on the company’s Rockerverb series, minus the reverb, and both A and B channels on the Dual Baby have 3-band EQ. The B side has the same setup and tonal characteristics as the dirty channel of the Tour Baby, sans the footswitchable volume, so you can’t pump up the level for solos with a quick stomp. However, it does have a “tight” toggle, so it’s easy to get into the same spanking, airy terrain as the Gain Baby’s dirty side or play it relatively clean.
But the A channel has another asset: a “tubby” switch, which is new for Orange. With gain pushing toward 7 and presence at about midway, and the treble rolled back, the tubby setting’s low-end boost evokes Black Sabbath—dark and ominous and perfect for sustained power chords. If your tastes run toward nasty, there’s a lot to like with the Dual Baby.
Key:
Channel A rhythm > channel A lead > channel A rhythm tubby > channel A lead tubby >
Channel B rhythm > channel B lead > channel B rhythm tight > channel B lead tight
The Verdict
Orange’s three versatile Babies cover a lot of ground in small, very affordable, well-built packages. Their response and rich-hued sounds–available even at low volumes–never left me pining for tubes, and their 100-watts make them useful for any stage. For travel, studio, or at-home playing, they are well worth investigating. These Babies can unquestionably run with the big boys. PG
Last year’s Manning Fireworks was a breakout moment for Asheville, North Carolina’s MJ Lenderman, which is both the name of the band and the actual name of singer and guitarist Jake Lenderman, who also plays in the band Wednesday. The record topped plenty of year-end lists and drew favorable comparisons to the likes of Neil Young, Dinosaur Jr., and other stars of the pre- and post-’90s indie-rock boom.
On tour behind the record, the band stopped in at Birmingham, Alabama, joint Saturn on February 1. PG’s Chris Kies met up with Lenderman, guitarist Jon Samuels, pedal-steel player Xandy Chelmis, and bassist Landon George before the show to get the dirt on their dirt.
Brought to you by D’Addario.The SG
Lenderman’s main guitar these days is this 1979 Gibson The “SG,” which he bought in Birmingham while opening for Plains. It’s tuned to D standard, with Ernie Ball Beefy Slinky strings.
Do the Mascis Mash
It’s no surprise that Lenderman digs the Squier J Mascis Signature Jazzmaster. He’s a big Dinosaur Jr. fan and got to sit in with them in Los Angeles to play “In A Jar” in December 2024. From top to bottom, this one is tuned C–G–D–G–G–E for “You’re Every Girl to Me.”
Tele Time
This Fender American Vintage II 1977 Telecaster Deluxe comes out for cleaner needs in the set.
Original Jazz
This is Lenderman’s iconic 2008 Jazzmaster, which he bought back in Asheville.
Hi-Steppin'
Lenderman borrowed a Hiwatt to use at some hometown shows in Asheville and fell in love, so he brings this Custom 50 out on the road now. He’s working his way to a full J Mascis setup, “one cab at a time.”
MJ Lenderman's Board
Lenderman’s clean, easy board has a D’Addario tuner, Death By Audio Interstellar Overdriver Deluxe, a Dunlop wah which he uses as a subtle filter, and TC Electronic Flashback 2.
Loan from Lenderman
Lenderman recorded plenty with this Fender Player Telecaster, but now Samuels puts it to work
Hartzman's Hot Rod
Another loaner, this Hot Rod DeVille combo is on long-term borrow from Wednesday’s Carly Hartzman.
Jon Samuel's Board
Samuels’ board, which is a hybrid of his own pedals and even more borrowed units, carries a Hardwire HT-6 polyphonic tuner, Death By Audio Fuzz War, JHS Double Barrel, Dunlop wah, J. Rockett Archer Clean Boost, Joyo Tremolo, EHX Nano Small Stone, and TC Electronic Flashback 2.
Xandy's ZB
Chelmis, also a member of Wednesday, plays this 10-string ZB Custom, made in the early ’70s with a proprietary pickup. It stays in E9 tuning, and Chelmis makes it sing with a steel he bought from a pawn shop. It runs through a Fender Twin Reverb outfitted with a single 15", and a Goodrich H-120 volume pedal handles swelling duties. From time to time, Chelmis adds in a Guyatone SD2 sustainer for some fuzzy fun.
Precision Vision
George’s go-to is this 2006 Fender Mike Dirnt Precision Bass, strung with Ernie Ball medium-gauge flatwound strings.
Better Beta
George runs through a Sunn Beta Bass head into an Ampeg SVT810E cabinet.
Landon George's Board
On his board, George packs a Korg Pitchblack tuner, Origin Effects Cali76 Compact Bass, Boss DD-7, Darkglass Electronics Alpha Omega, and a Noble Amplifier Company utility box: It’s a tube preamp, DI box, and power supply, all in one.
