Robert’s Western World on Nashville’s Lower Broadway was home to the Don Kelley Band for as long as anyone can remember. Kelley’s band was an institution in Nashville, serving as a stepping stone for super-pickers like Guthrie Trapp, Brent Mason, Johnny Hiland, Daniel Donato, JD Simo, and more. “Slick” Joe Fick and Luke McQueary also came up through the ranks of the Don Kelley Band. After Don retired in 2020, Fick and McQueary enlisted drummer/vocalist Billy Van Vleet and kept Don’s old shift going, throwing down at Robert's Western World each night from Wednesday through Saturday. John Bohlinger and the PG team joined Kelley’s Heroes pre-shift at Robert’s to rundown their rigs.
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McQueary plays a 1965 Fender Deluxe Reverb, which may still technically belong to his dad. He switched out the speaker to a Celestion Vintage 30.
Pedal
McQueary keeps it simple, and only plugs into an old modded Boss SD-1—which also belongs to his dad.
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Photo 1: Despite the ornamental look of this golden Celestion speaker from 1924, its main components are essentially the same as today's.
While the membrane of a guitarist's speaker is almost always made from paper or cellulose, bass speakers also sport carbon, Kevlar, or polypropylene for enhanced stiffness. Added mass and stiffness contribute to frequency response in the bass range. Extra ribs on the conical membrane and chemical coatings can further enhance stiffness and rigidity. And, as opposed to our instruments, where we often have tonally dominating parts like the pickups, almost all parts of a speaker are interacting.
On a guitar speaker, the shell of the voice coil is most often made from paper, making it both light and sensitive, with a detailed upper range, but highly sensitive to heat. The bass version sports bigger voice coil diameters, for better thermal flux, and Kapton or fiberglass shells. As guitarists initially swore on alnico and, later, ceramic ferrite magnets, the bass world has now moved on to neodymium—which is 10 times as powerful and more lightweight than a ferrite magnet—as the norm. As we know, compared to guitar gear, ours is typically bigger, heavier, and way more powerful.
As guitarists initially swore on alnico and, later, ceramic ferrite magnets, the bass world has now moved on to neodymium—which is 10 times as powerful and more lightweight than a ferrite magnet—as the norm.
Another common difference is that guitarists mostly rely on one speaker size for their whole rig—mainly 12". Bassists, on the other hand, are used to mixing several sizes, using crossovers, or even bi-amping, mainly because of the hard realities of reproducing a good low end.
In the heyday of our instrument, those huge and heavy Ampeg SVTs and their 9x10 cabinets were at the heart of many a bassist's dream rig. The 300W SVT came in around 88 pounds, while a modern 300W class D head might be just a mere 3.3 pounds. The evolution of speaker cabinets is quite similar, with lighter cabinet enclosures sporting highly efficient speakers. If we want to quantify efficiency or sensitivity per watt, we have to look at their sound pressure level (SPL) and remember what logarithmic scales mean for perceived loudness and necessary wattage: Raising SPL by 3 dB requires twice the wattage. Or, similarly, a speaker's 3 dB of higher efficiency is like doubling an amp's power.
Image 1: Here are two almost identical SPL and impedance plots, despite their fundamentally different magnet materials, with neodymium shown in blue and ferrite in red. The SPL plots are the wild upper curves, while impedance curves have just one peak.
Copyright SICA/Jensen Speakers, Italy
SPL measurements are most often shown as frequency response curves in the audible range of 20 Hz to 20 kHz, with decibel (dB) versus frequency (Hz). Image 1 shows a comparison of two 12" guitar speakers with an additional impedance plot in ohms (Ω). The two speakers use different magnet materials, with neodymium shown in blue and ferrite in red. Since neodymium is 10 times as powerful, that means a speaker's heaviest part, the magnets, can be 10 times lighter without much of a different tone and efficiency. Notice that both materials create almost identical results.
While frequency response curves are a common way to compare speakers, they can be misleading. Once SPL ratings are just given as one value in decibels, they are either measured as the level resulting from 1 watt at 1 kHz in 1 meter distance from the speaker—an old and not very helpful standard from the days of portable transistor radios—or as an average of a frequency range. Some manufacturers use complete audible range or parts of the prominent midrange in their spec info. So, as valuable as these frequency response curves can be, keep in mind that, without knowing the details, comparability between manufacturers has its limits.
Leni Stern is prepped to cut a track with her ngoni as her trusty Custom Shop Strat waits its turn. The guitar's weathering is the result of finish damage by mosquito spray she used while playing festivals in India and Africa.
Here's Stern's road-warrior Blues Junior, which has a neodymium Jensen Tornado replacement speaker.
The key, says Stern, was installing a pickup by Carlos Juan, who designed the magnetic wonders that Pat Metheny uses to amplify his Linda Manzer-built 42-string Pikasso. It was given to her by classical guitarist Derek Gripper, and once it replaced the contact pickup she'd been using, the ngoni truly came to electrified life. (See this story online to watch her play the ngoni onstage.)
"On tours, I like to bring my own amp, so I had to reduce the weight of the Blues Junior with a flight case so they would come in at 50 pounds exactly."
"It sounds really well-balanced and has very low feedback, with my Blues Junior, Super Champ, or Matchless," Stern says, bringing up the trio of 15-watt amps that are the stars of this month's column. Stern has had some changes made to all of them—adding a neodymium speaker to the Junior, her most frequent traveling companion, and chop-shopping the Matchless Lightning 15 so its head is removable, significantly reducing the stock weight. The Fender Super Champ's original 10" speaker has been replaced with a 12"—an easy and common mod that gives the little bugger a significantly heftier voice.
While it looks like a first-generation Matchless Lightning 15, the head and cab of Stern's amp have been modded so the head can be lifted out and used independently.
Big, often pastel tones—mostly from Teles and Strats (a '59 hardtail Stratocaster is one of her most-prized guitars)—are among Stern's signatures. And while the Super Champ mostly stays home, the Junior and Lightning do globe trot—just like her music, which is a highly evolved mix of ethnically rooted sounds that Stern traces back to the eclectic internationalist musical tastes of her father and the pancultural sensibility she experienced growing up in Germany, which she then fanned to conflagrance via her own miles-deep jones for learning and exploring. West African music is a particular passion and provides much of Dance's backbone.
Leni Stern Trio at Iridium - 11/2012 - Like a Thief
West—Africa that is—meets west as Leni Stern plays her ngoni through one of the faithful Fender Blues Juniors she's carried to gigs around the world for the past 13 years. In this 2012 performance at Manhattan's Iridium, she's playing "Like a Thief," from 2011's Sabani, one of her series of albums blending the traditional sounds of Senegal and Mali with jazz and pop.
"On tours, I like to bring my own amp, so I had to reduce the weight of the Blues Junior with a flight case so they would come in at 50 pounds exactly," she explains. The weight of the Junior is now 23 pounds, verses its out-of-the-factory 31. For the Matchless, it wasn't as simple as a speaker replacement. The company seamlessly modded the 1x12 combo so the head can be nestled in the cab or travel separately. Both are run through a pedalboard, and while the Matchless has no reverb and requires a stompbox, the Junior has the company's classic spring reverb. The tube array is three 12AX7s for the Junior's preamp stage and two EL84 power tubes, with 3-band EQ plus master and volume dials, and a fat-boost switch she often uses. Her favorite source of overdrive, though, is a Free the Tone Heat Blaster, which lends the kind of smooth, creamy power-tone that she shares with her husband, Mike Stern. (Watching them perform together is as much fun as seeing a pair of otters at play.) The Matchless Lightning, by the way, also has three 12AX7s, one EL84 power tube, and volume and master dials with 2-band EQ.
And here's the (mostly) homebody: a Fender Super Champ with a 12" Celestion TN120.
It becomes obvious in conversation that the Junior is her favorite. She speaks of it as warmly as the amp itself speaks. "I've had three over the past 13 years, because it has a circuit board and those get damaged in all the travel, which doesn't happen with point-to-point-wired amps like the Matchless," she notes. "But the Junior is very versatile, with tones that have the lightness and sweetness of a Princeton, but they're stronger and louder. I use the overdrive function a lot. It gets me a little into Boogie territory."
To misquote John Lennon, happiness is a warm tone, but Stern does have one regret regarding amps. "I'm still a little mad at myself for not buying a Dumble 25 years ago when Robben Ford told me I should," she says. "At the time, they were just becoming popular, but a Blues Junior only cost $300 or something like that. I thought paying $3,000 for an amp was ridiculous." She laughs.
Leni Stern: Kono (Bird)
Stern's new album, Dance, is a lovely and gentle fusion of her sprawling influences that amounts to a genre unto itself. Here, Stern and her band, keyboardist Leo Genovese, bassist Mamadou Ba, and percussionist Alioune Faye, showcase the delicate melody and rolling groove of "Kono."