
For at least a decade, the classic Ampeg SVT was the dominant bass amp for power and tone.
From the giant, hefty beasts of yore to their modern, ultra-portable equivalents, bass amps have come a long way. So, what's next?
Bassists are often quite well-informed about the details of their instruments, down to the finest technical specs. Many of us have had our share of intense discussions about the most minute differences between one instrument and another. (And sometimes those are interrupted by someone saying, "It's all in the fingers.") But right behind our backs, at the end of our output cables, there is a world of tone-shaping that we either simply ignore or just don't want to dive into too deeply. Turning a gear discussion from bass to amp is a perfect way to bring it to an abrupt end.
Since the beginning of our instrument's history, bassists have faced the fundamental and existential problem of trying to be heard. It's solved now, but too many players don't seem to be interested in how we got here. And it's not just bassists. Even some amp manufacturers haven't been concerned with the details. A few readers might remember that in my September 2019 column, I discussed class-D amp technology. As part of my research, I called a very respected amp manufacturer to get his insight into class-D technology. His stunning response was: "We simply checked some Asian-made modules and chose the one we thought sounded best, but I don't know and never cared how they work." Even the offer of a short technical introduction was met with blissful ignorance. So, if anyone thinks they don't need to know how their amp works, at least you're in good company!
Over the course of the last 80 years or so, the fundamental technology used in our amps has been replaced—and not just once. The technological changes came in several waves and another might be on the way.
Here we are now after this last wave of amp-tech: down from 300 watts at 40 kilograms or 88 pounds in the 1970s, to 500 to 1000 watts at 1 to 3 kilograms or 2 to 7 pounds today.
For the greater part of the last century, bass amps relied on tube circuitry, and it took until the middle of the century to make decently powerful, but heavy and fragile, amps. Unfortunately, guitarists used the same technology—and sometimes even the amps that were initially made for us. (Remember that our low-end needs about 10 times the power of a guitar amp to cut through!) So, as their volume increased, our need for more power just became greater. Our problem remained until the 1960s when amps like Ampeg's B-15 Portaflex and SVT entered the scene. High-output amplification manufacturers sprouted everywhere, enabling loud rock bands to move from clubs to stadiums.
Though the transistor quietly altered the landscape of radios and small solid-state amps during the early 1950s, it took until the late '60s before this technology made it into our rigs. The first companies to make solid-state amps were those who possessed a higher engineering background. Vox, for example, released one of the first solid-state bass amps, thanks to their prior experiences with solid-state circuits from their organs. Many smaller companies soon followed, although most earned a reputation for unreliability. But the technology developed at a breathtaking pace.
This Ashdown Little Giant is more powerful than the mighty SVT at less than 1/10th the weight!
Photo courtesy of wikimedia.com
During the 1980s, clean and powerful hi-fi-esque synth sounds became trendy. This benefitted bassists with the development of clever tone-shaping options, hybrid circuits with tube preamps, bi-amping, internal DIs, and even more power.
Once we were sure to be heard, it was time to look for other advantages, like reduced weight and size, and along came another wave of new amp technology: class D. (See my column "Signal Processing in Class-D Amps," September 2019.) The basic principle behind class-D technology is pulse width modulation (PWM), which sounds as if those with higher engineering skill would once again be in the lead. Instead, there are just a few manufacturers building class-D power modules, and amp builders can use those as the foundation of their own amps. Just get one of the modules, which come in different power ratings, add a power supply and a tone-shaping circuit, and you're done. With several competing manufacturers offering identical power amps, the individual strengths have fully shifted to the qualities of their tone-shaping circuitry and other add-ons or gimmicks.
Here we are now after this last wave of amp tech: down from 300 watts at 40 kilograms or 88 pounds in the 1970s, to 500 to 1000 watts at 1 to 3 kilograms or 2 to 7 pounds today. What could be the next move? It looks as if the power-to-weight ratio has reached an end for quite some time, but tone-shaping capabilities in preamps might shift from classic circuitry to profiling or modeling amps as a fourth wave. And this time it's clearly engineering competence that will make the difference. Can you imagine what instruments we'd be playing today if our basses had made similar progress?
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Jack White's 2025 No Name Tour features live tracks from his album No Name, with shows across North America, Europe, the UK, and Japan.
The EP is a 5-song collection of live tracks taken from White’s 2024 edition of the tour, which was characterized by surprise shows in historic clubs around the world to support the 2024 album No Name.
No Name is available now via Third Man Records. The acclaimed collection was recently honored with a 2025 GRAMMY® Award nomination for “Best Rock Album” – White’s 34th solo career nomination and 46th overall along with 16 total GRAMMY® Award wins. The No Name Tour began, February 6, with a sold-out show at Toronto, ON’s HISTORY and then travels North America, Europe, the United Kingdom, and Japan through late May. For complete details and remaining ticket availability, please visit jackwhiteiii.com/tour-dates.
White’s sixth studio album, No Name officially arrived on Friday, August 2 following its clandestine white-label appearance at Third Man Records locations that saw customers slipped, guerilla-style, free unmarked vinyl copies in their shopping bags. True to his DIY roots, the record was recorded at White’s Third Man Studio throughout 2023 and 2024, pressed to vinyl at Third Man Pressing, and released by Third Man Records.
For more information, please visit jackwhiteiii.com.
JACK WHITE - NO NAME TOUR 2025
FEBRUARY
11 – Brooklyn, NY – Kings Theatre
12 – Brooklyn, NY – Brooklyn Paramount
17 – Boston, MA – Roadrunner
18 – Boston, MA – Roadrunner
21 – Paris, France – La Cigale
22 – Paris, France – La Trianon
23 – Paris, France – La Trianon
25 – Utrecht, Netherlands – TivoliVredenburg (Ronda)
26 – Utrecht, Netherlands – TivoliVredenburg (Ronda)
28 – London, UK – Troxy
MARCH
1 – London, UK – Troxy
2 – Birmingham, UK – O2 Academy Birmingham
3 – Glasgow, UK – Barrowland Ballroom
10 – Hiroshima, Japan – Blue Live Hiroshima
12 – Osaka, Japan – Gorilla Hall
13 – Nagoya, Japan – Diamond Hall
15 – Tokyo, Japan – Toyosu PIT
17 – Tokyo, Japan – Toyosu PIT
APRIL
3 – St. Louis, MO – The Factory
4 – Kansas City, MO – Uptown Theater
5 – Omaha, NE – Steelhouse Omaha
7 – Saint Paul, MN – Palace Theatre
8 – Saint Paul, MN – Palace Theatre
10 – Chicago, IL – The Salt Shed (Indoors)
11 – Chicago, IL – The Salt Shed (Indoors)
12 – Detroit, MI – Masonic Temple Theatre
13 – Detroit, MI – Masonic Temple Theatre
15 – Grand Rapids, MI – GLC Live at 20 Monroe
16 – Cleveland, OH – Agora Theatre
18 – Nashville, TN – The Pinnacle
19 – Nashville, TN – The Pinnacle
MAY
4 – Austin, TX – ACL Live at the Moody Theater
5 – Austin, TX – ACL Live at the Moody Theater
6 – Dallas, TX – South Side Ballroom
8 – Denver, CO – Mission Ballroom
9 – Denver, CO – Mission Ballroom
10 – Salt Lake City, UT – The Union Event Center
12 – Los Angeles, CA – Hollywood Palladium
13 – Los Angeles, CA – Hollywood Palladium
15 – Santa Barbara, CA – Santa Barbara Bowl
16 – Oakland, CA – Fox Theater
17 – San Francisco, CA – The Masonic
19 – Seattle, WA – The Paramount Theatre
20 – Seattle, WA – The Paramount Theatre
22 – Vancouver, BC – Commodore Ballroom
23 – Vancouver, BC – Commodore Ballroom
24 – Troutdale, OR – Edgefield Concerts on the Lawn
A dose of magic gain potion.
Works like a little vial of magic gain potion. Fattens without obscuring individual frequency bands.
None.
$129
Gamechanger Audio Auto Reverb
solodallas.com
The Schaeffer-Vega Diversity System—an early and very successful wireless system—excelled at the tasks it was designed for. But there was more magic than met the eye. Though designed to sound as transparent as possible, it nonetheless colored the signal in a way that people like Angus Young and Eddie Van Halen found essential.
SoloDallas explored the possibilities of this circuit before in pedals like theSchaeffer Replica, but the new SVDS Boost strips the formula to essentials. Minimalist controls—one knob, that’s it—make this boost no less delicious. I’m not surprised Angus Young was smitten with the original SVDS. An SG and Marshall 18-watt amp sound fantastic naked, but the SVDS Boost has the rare talent for fattening everything without seeming to favor or obscure any frequency band too much. And as zest to the PAF/Marshall style formula, it makes the kind of rowdy, organic, airy, large, and punch-packing Marshall sound you would dream of getting in a studio or hearing on the radio. There are many shades of this basic awesome color in spite of the single knob. Unity gain lives in the earliest third of its range. From there you certainly get more volume, but mostly you bathe in various hues of compressed, saturated, thick, and dynamite growl. You don’t need a Gibson and a Marshall to use it to devastating effect, either. A Telecaster and Vibrolux snap with attitude and whip-crack energy with the SVDS in the line. And with both guitar/amp combos, the SVDS’ wide dynamic responsiveness to volume and tone attenuation assures that things stay cracking when you need more control.
Learn about this iconic guitar's journey, its mods done by Frank, and hear how it sounds in the hands of his son Dweezil.
Neil Young’s ’70s hits are some of the most recognizable radio rock jams of all time. But Neil’s guitar playing continued to grow over the ensuing decades, as he traversed styles from blues to country to electronic to rockabilly and beyond, eventually developing one of the most tonally decadent, fully formed improvisational voices in the entire guitar universe.
Neil Young’s ’70s hits are some of the most recognizable radio rock jams of all time. But Neil’s guitar playing continued to grow over the ensuing decades, as he traversed styles from blues to country to electronic to rockabilly and beyond, eventually developing one of the most tonally decadent, fully formed improvisational voices in the entire guitar universe.
Like any discography that’s been growing over the course of more than half a century, it can be hard to decode Young’s work. And with such an adventurous spirit, it could be easy to make some missteps and miss out on his best guitar works. In this episode, Nick guides Jason through some of his hero’s finest moments.
More news from Neil always seems to be on the horizon, so here’s your chance to catch up.