Dig into the weird wiring of the Hofner Beatle Bass and 172 guitar.
Hello and welcome back to Mod Garage! In this column, we will have a look at the famous HA2B control-panel wiring from the German Höfner company (often written as “Hofner” without the German umlaut). The control plate became famous on the Höfner violin bass—the model 500/1 that was released in 1956 and is often referred to as the “Beatle Bass” because of Paul McCartney.
Höfner also used this wiring on a lot of their early solidbody electric guitars, like the famous model 172. These models were covered in colorful vinyl rather than receiving a paint job. The demand for electric guitars was very high in the ’60s, and a paint job was very time-consuming and expensive, so this method was a welcome alternative to cut costs and save time. The vinyl is still an eye-catcher today.
My first real electric guitar was such a Höfner, a later model without the control plate, but still covered in gorgeous red vinyl. Eventually, I removed the vinyl and put some dilettantish paint job on it. When I think about it today, I feel like a lemon.
Frank Meyers recently wrote a cool column about the Höfner company and its history, which appeared in PG’s March 2023 issue, so if you want to find out more about them, please check it out.
So, let’s have a look at the control plate and its very special wiring. It might be considered weird from today’s perspective, but at the time, this wiring was state of the art. The control plate itself and the fancy “tea cup” knobs are still available today—it is called HA2B with an additional letter indicating the color of the plastic control plate, e.g. B (black), C (cream), T (tortoise), and so on.
Photo 2
Photo courtesy of L’instrumenterie, Baptiste Zermati, Villeurbanne, France (https://linstrumenterie.com)
This wiring is designed for a guitar with two pickups and sports an individual on/off switch and volume control for each, plus a rhythm/solo switch, resulting in a total of two pots and three switches. Please note that the plate is labeled in English and not in German, which clearly shows that Höfner was targeting the international market while still selling large quantities inside Germany.
Here is a short summary of what the individual controls are doing, using Photo 2 as our reference:
• neck pickup volume pot
• solo = full output signal / rhythm = output attenuated to about 70 percent
• bass off = bridge pickup on / bass on = bridge pickup off + treble filter
• treble off = neck pickup on / treble on = neck pickup off + bass filter
• bridge pickup volume pot
The way the bass and treble switches are wired up is the real weird part. Back in the day, a neck pickup was often referred to as the bass pickup and the bridge pickup the treble pickup. In this case, the bass switch is for the treble pickup and vice versa. So when the bass switch is off, the bridge pickup is on; when it’s on, the bridge pickup is off. And when the treble switch is off, the neck pickup is on; when it’s on, the neck pickup is off.
This results in the following: When both switches are in the off position, both pickups are engaged (in parallel), and when both switches are in the on position, both pickups are disabled, which works like a kill switch to mute the whole guitar.
This is, for sure, one of the fanciest guitar wirings ever. But believe me, compared to some wirings that were used in the electric guitars of the Musima company in the former GDR, this one here is as harmless as can be.
"There is no law against experimenting with the values of the caps and resistors to tweak the tone to your personal preferences."
Let’s have a look what’s under the hood:
2 x 250k audio pots
3 x DPDT slide switches
1 x 270k + 1 x 100k resistors for the solo/rhythm switch
1 x 0.01 uF treble cap
1 x 0.1 uF bass cap + 1 x 8.2k resistor
You can use any cap and resistor you want. I like to use small film caps and 1/4-watt metal film resistors. It’s nice working with these parts because they are small enough to fit the control plate.
The wiring works as follows:
Solo/rhythm switch: While the solo position has full signal output, the rhythm position engages two resistors to reduce the output to approximately 70 percent by bleeding some signal to ground.
Bass switch: In the on position, the bass capacitor and the resistor filters some highs off to ground.
Treble switch: In the on position, the treble capacitor filters some bass off to ground.
So, here we go for the wiring:
Fig. 1
Illustration courtesy of SINGLECOIL (www.singlecoil.com)
This is the real deal circuit that Höfner used in the early ’60s. The modern overhauled wiring of the HA2B circuit looks very similar, but uses a 0.1 uF treble cap and has no additional resistor in-line with the bass cap. To my ears, the vintage version sounds better, but this is a matter of taste and there is no law against experimenting with the values of the caps and resistors to tweak the tone to your personal preferences.
I would like to thank Baptiste Zermati from the L’instrumenterie company in France for the photos of the vintage Höfner 172—a big shoutout to him.
That’s it! Next month, we will talk about the brand new PRS “Dead Spec” Silver Sky wiring for John Mayer and how you can adopt this for your own Stratocaster, so stay tuned!
Until then ... keep on modding!
Like King Ghidorah, these rock fretmasters prove three heads are better than one.
After a five-year break in studio releases, Train came roaring back this year with AM Gold and a tour with dates stretching into 2023 that’s delivering their new songs and a sampling of the group’s 28 charting singles from their nearly 30-year history. PG’s John Bohlinger stopped in on the band’s two guitar players, Jerry Becker and Taylor Locke, and bassist Hector Maldonado, before their June 21 show at Nashville’s Ascend Amphitheater. They displayed the big bevy of instruments they use to recreate the Train sound live.
PS: Special thanks to techs Wayne Davis and Stephen Ferrera-Grand for help running down the rigs.
Brought to you by D’Addario Nexxus 360 Tuner.
Yellow Fever
Taylor Locke’s No. 1 is this all-stock, scarred Gibson Custom Shop Les Paul Special in TV yellow. For the record, Locke uses Shubb and Kyser capos, strings his axes with Dunlops, and uses the latter company’s picks and slides.
Hum-Doozie
When the song calls for a guitar with humbuckers, Locke goes with his all-stock Gibson Custom Shop R7 Les Paul Goldtop. It’s essentially a re-do of a 1957 Paul right down to the chunky C-profile neck and Indian rosewood fretboard.
Double Trouble
Some of Train’s songs require both electric and acoustic tones, and for those Taylor employs an Epiphone Casino, which tech Stephen Ferrera-Grand has outfitted with Fishman’s PowerBridge pickup system. The jack on the Casino is stereo, which enables splitting the stock electric pickups and a piezo pickup to two separate wireless packs, mounted side-by-side on Taylor’s guitar strap. The piezo signal hits a Sound Sculpture Volcano expression pedal volume controller that routes to an on/off switch on his Line 6 HX Effects stomper. The piezo sound is sent to front-of-house and monitors via a Fishman Aura Spectrum DI preamp.
Fab Filtration Across the Nation
When it’s time to go Filter’Tron, Locke straps on this tuxedo’d G6128T Vintage Select ’89 Duo Jet with a trusty Bigsby. In case the colors aren’t shining though in the photo, it’s an impressive black with metallic green sparkle, and Locke keeps it tuned a half-step down and strung with Dunlop .011s
Old Frontier
Locke aims for a couple of classic acoustic guitar tones, and for vintage vibe he reaches for this 1964 Epiphone Frontier. It’s from the original ’58 to ’70 run, with a Sitka spruce top and maple back and sides. These days, the model has been restored to the catalog courtesy of Gibson’s acoustic builders in Bozeman, Montana.
Clydesdale Tone
The workhorse sound of the Gibson J-45 resonates in the Train catalog, and this is one of many the band keeps in their 6-string arsenal.
Reso-Phonics
When the language of roots guitar needs to be spoken, Locke grabs his Gretsch resonator—part of the company’s Roots Collection of guitars. This one uses Gretsch’s patented Ampli-Sonic biscuit cone.
Playing the Dozens
When it’s time to wrangle acoustic jangle, this all-stock 1971 Ovation Glen Campbell 12-string gets to shine and shimmer. Unlike modern 6-string Campbell signature Ovations, this guitar lacks a cutaway. It has a Sitka spruce top, a walnut bridge, and an ebony fretboard—and sounds killer.
It’s Pronounced Oo-koo-lay-lay in Hawaiian
The hit “Hey, Soul Sister,” which reached No. 3 on Billboard’s pop chart in 2009, is guaranteed set-list material for every show. So, of course, Locke always has a requisite ukulele onstage. Here’s a look at the pair of Godin ukes in his rack.
Lean, No Cheese, 35 Watts
Locke uses a Top Hat King Royal 2x12 combo kept slightly off stage but loud enough to be audible. The 35-watter has three 12AX7s and four EL84 power tubes, and a GZ34 governing the rectifier. There’s a fat-off-bright switch, too. How does he run it? See the next photo.
All Set!
Here are his settings for the Top Hat. Note the master volume riding at 1 o’clock and his preference for the hi-input jack.
Is That a Banana, or….
Locke isn’t monkeying around: If his Top Hat goes down, he’s got a Vox C4 tucked aside as a spare. And a banana—maybe to snack on while Ferrera-Grand powers the amp up?
The Great Switcheroo
Locke’s electric guitar signal hits a Shure Axient Digital wireless and zooms into a Radial SW4 switcher. Tech Stephen Ferrera-Grand does the wireless switching on the Radial unit, in his guitar rack.
Above the SW4, you’ll see, peeking out, the acoustic boss: a Countryman DI. The Godin ukuleles follow the same signal flow as the acoustics, but along a different path into a separate Countryman DI.
Treading the Treadles
From the rack, the signal is sent out to a Pedaltrain ’board, outfitted with a Best-Tronics patchbay. The board contains a Dunlop DVP1XL volume pedal to a Line 6 HX. A second DVP1XL controls certain effects parameters, such as delay repeats and Leslie speed. The signal is then sent into a Boss NS-2 noise suppressor and on to the Top Hat amp.
Each speaker gets its own microphone: a Shure SM57 and an Audio-Technica AT4040.
For the majority of the set, Taylor keeps his HX set up with the following effects models: a Tone Bender fuzz (for leads and solos), a Klon Centaur (primary overdrive sound, almost always on), an MXR Timmy OD (neutral volume boost), EHX Deluxe Memory Man (modulated slap delay), Boss DM-2 Delay (long delay), and a Fender Vibratone (rotary). Taylor scrolls to other pedalboard scenes for song-specific effects, using tremolo for “Meet Virginia,” a Small Stone phaser for “AM Gold,” and so on.
Butterscotch Bliss
Another entry from the realm of the classics: Jerry Becker’s 2011 all-stock Fender American Vintage ’52 Telecaster has an ash body, a large U-profile neck, and, of course, a maple fretboard. It is strung with Dunlop DEN1046 Electric Nickel Performance+ string sets, running .010–.046. PS: Becker uses Levy’s straps and wireless pouches, Dunlop custom graphic signature picks, and Kyser Quick-Change capos.
Red Horse
This Gibson SG Classic from 2010 is stock and strung with Dunlop Performance+ .010–.046 sets—as are all his electrics. It has P-90s, a rosewood fretboard, and pearloid dot inlays up the neck.
Guitar of the Beast
This second-generation Gibson Les Paul Special reflects the body style that led Les Paul himself to cut ties with Gibson in the early 1960s. Nonetheless, with their two P-90s and lighter slab bodies, these are killer guitars. The double-horn cutaways make this 1973 a rare beast. It’s stock.
All Stock and Ready To Rock
Here’s Becker’s 1973 Gibson Les Paul Custom, left as it came from the factory. As you may recall, this model comes with “banjo”-style fret wire, to earn their reputation as—as Gibson put it on the model’s introduction in 1954—fretless wonders.
Modern Classic
This Gibson ES-339 was built in the first year the model was issued: 2007. The company introduced this guitar as a smaller—Les Paul sized—take on the ES-335, with a laminated maple-poplar-maple body, a maple center block, and spruce contour braces.
One More 45
Here’s yet another of Train’s Gibson J-45s. This one is a 2013 Custom Shop model in a wine red finish, and it is strung with Elixir 11050 80/20 Bronze Polyweb lights, gauged .012 to .053.
Nashville Tuning
Becker’s 1966 Gibson B-25 is set up in Nashville, or high strung, tuning. In this tuning, the wound E, A, D, and G strings are replaced with lighter-gauge strings tuned an octave higher than usual. In the old days, this had to be done by raiding 12-string sets, but some modern string makers produce Nashville tuning sets. So, Becker uses D’Addario EJ38H Phosphor Bronze .010–.027s.
Canadian Nylon
This 2017 Godin Multiac Nylon Duet Ambiance Natural HG has Fishman electronics that allows the internal blending of four microphone settings. It also sports a slim nut width (1.9"), a Richlite fretboard, and a chambered mahogany body. The strings: D’Addario EJ31 Pro-Arté Rectified Nylon Hard Tensions.
In the Pedal Pond
Becker uses a Fractal Audio Systems FX8 MkII combined with a Mission Engineering SP-1 Expression Pedal. There’s a Lehle D.Loop SGoS Loop Switcher, a Boss TU-3 Tuner, a Radial JR-2 Remote, and a Lehle P-Split Passive Splitter. It’s all powered by a Voodoo Labs Pedal Power 2 Plus.
But Wait, There’s More
Guitar tech Wayne Davis mapped out Becker’s signal flow for us. The electric guitars hit a Shure Axient Digital Wireless receiver and flow into a Radial JX62. There, the 6-strings can be directed into the Lehle D.Loop in and then out via a loop A send to the Fractal FX8. The loop A return then reroutes through a D.Loop out to the Radial again. Then there are amp options: a Matchless DC-30 or a Leslie combo preamp and 145 rotary speaker cabinet. Acoustic guitar arrives via the wireless and hits the PA via the JX62 DI out.
Green Sound Machine
This envy-shaded DC-30 is Becker’s big gun. It was the company’s first design and gets huff from four EL84s, with two preamp sections: one powered by two 12AX7s and the other by a single EF86. That’s a lot of tonal versatility.
The Understudy
This Vox AC30 acts as Becker’s back up.
Coming Up Roses
Bassist Hector Maldonado’s long search for an early ’60s P bass landed him this 1960 Fender Precision days before Train’s current summer tour. The gem was professionally refinished by Joe Riggio of Riggio Custom Guitars at some point, but other than that it’s as Leo intended over 60 years ago. Riggio helped connect Maldonado to the seller so he could acquire his dream bass.
No. 2
With the arrival of his new old P, this off-the-rack Fender American Vintage ’62 P bass reissue got demoted to the No. 2 slot. But Maldonado says it plays better than some of his vintage instruments, and this 4-string has been around the world a few times with Train. Both Fenders take D’Addario roundwounds (.045–.100).
Sir Paul’s Highball
If you’ve spent time with any of the last three Train albums, you’ve heard this limited-run Hofner Gold Label Violin Berlin model. It is made of German Nussbaum wood and has the company’s 511B staple pickups in a normal-spacing configuration. Hofner’s Gold Label instruments are highly limited editions.
Get Back!
For the ultimate Beatles’ vibe, Maldonado uses this Hofner B-Bass HI-Series Violin model. It provides the desired “pluck” sound of 1964. Both of his stage Hofners take D’Addario XL Chromes, flatwound (.045–.100).
Spanish Flair
“Cleopatra” off AM Gold has a flamenco guitar part. Maldonado is classically trained, so he was the obvious choice to handle it, plus Becker and Locke are already busy with their own guitar chores on the song. Hector’s setup on his Yamaha CG172SF is creative. He uses a blend of strings from his Fender Bass VI and nylon guitar strings to hold down the low end and shred fingerstyle.
Racked and Ready
A Mesa/Boogie Subway D-800+ powers his basses, while an Avalon U5 Class A Active Instrument DI give a clear signal to front-of-house. And like his compatriots, he’s running a Shure AD4D rackmount wireless system.
More on the Floor
Maldonado has more pedals on the floor than his fellow Trainmen. His stomp station consists of a trio of mini MXRs—a Carbon Copy, Phase 95, and Vintage Bass Octave—plus an Electro-Harmonix Holy Grail Nano reverb, a Tech 21 SansAmp Bass Driver DI, a DigiTech Bass Driver OD, an Origin Effects Cali76 compressor, and a Mesa/Boogie Five-Band Graphic EQ. A Dunlop Volume (X) DVP3 and a Boss TU-3s mini Chromatic Tuner keeps his instruments reined.
The Hofner 500/1 violin bass has been McCartney’s career-long sidekick. Let’s spotlight a 1967 model.
Paul McCartney has seemed unstoppable since he returned to touring in 2009 after a four-year break. But then … COVID. Which stopped everybody. Although not entirely. Like many others, McCartney spent his 2020 “rockdown," as he calls it, writing the songs and playing all the instruments for his new album, McCartney III.
I'm guessing that among those instruments was his beloved 1963 Hofner 500/1 violin bass—his main axe with the Beatles, and all of his work, including tours, since he took it out of mothballs for his 1989 album Flowers in the Dirt.
Just as McCartney III was coming out in December, this column's 1967 Hofner 500/1 violin bass came into the shop. And to amplify the kismet, the Beatles were playing on the sound system when the bass' now-former owner brought it in to sell.
This model wouldn't be so iconic if McCartney could've afforded a Fender back in 1961, when the Beatles were literally getting their act together playing clubs in Hamburg. But his first Hofner was only $45. That one was stolen, and in '63 Hofner gave him a replacement, which is the bass we all know and love to hear.
Pardon my grunge: The control panel—three EQ sliders and two volume dials—shows some grit and dirt, well-earned from years in smoky clubs.
The Hofner violin bass dates back to 1955, when Walter Hofner designed the prototype. The small, hollow body and violin shape made it easy to carry and play—especially in comparison to Fender's Precision. The tone aimed for qualities that would appeal to both acoustic upright bass players and the expanding electric bass market—and with flatwound strings, it did just that, creating a fat, thumpy voice the amplified the sound so familiar on pop and jazz records of the '40s, '50s, and early '60s.
Most of what's changed about the Hofner 500/1 over the decades is the electronics, while the maple body, spruce top, rosewood fretboard, and dot inlays have remained a staple. The neck and bridge pickups had many iterations in the '50s and '60s. Originally, Hofner called them wide-spaced pickups, because they were located far apart, as close to the neck and bridge as workable. By '57, the bridge pickup was moved closer to the neck, to about mid-top. And in 1960, the black bar pickups Hofner used were replaced with toaster-style examples. A year later—and on McCartney's '61—the so-called twin-coil Cavern pickups arrived, along with the replacement of the tortoiseshell pickguard with a cream pearloid version. But '62 brought another shift, to diamond logo pickups, called that because of the diamond engraved on their covers. And a year later those were gone—nudged aside by staple pickups. In 1963, two-piece necks were also used on some 500/1s, and the two-on-a-strip tuners began to be replaced by standalone versions.
Here's a close-up look at the '67s neck-slot blade-style single-coil pickup—the seventh pickup variation for the 500/1 model.
But wait! There's more! The year of our Hofner, 1967, marked the introduction of single-coil blade pickups in the 500/1. Until this point, all of the aforementioned changes did little to alter the sound of the instrument. But the blades are different—hotter and more gainy. These pickups have two magnets on each side of a center blade, and they are ceramic, not alnico like earlier Hofner pickups. Their louder, more-forward tone is perfect for recording, and takes to digital tracking and mixing very well. The control set had slight variations over the years, but in 1967 was a sleek array of two volume dials and three responsive tone switches marked rhythm, bass, and treble.
Our 500/1 has an ebony two-piece floating bridge, and the fret saddle inserts have been removed to emulate the mod supposedly made by McCartney to get a more thuddy and muted sound. (A reissue version of the original bridge assembly is available.) The tuners on this bass were replaced with closed-back Grovers, which are a lot easier to turn than the small-button versions that came standard in '67.
Beneath its elegant, curved top, our 500/1's headstock has Grover replacements for the small-button OEM tuners, which went from two-to-a-strip to standalones in 1967.
This bass has been played a lot, and it shows in the finish wear and checking on its body. Plugging in made me want to start banging out some McCartney-style bass melodies and explore those loping, rich tones that were such an important element of the Beatles' sound. In the 1967 Hofner catalog, the 500/1 was listed at $345. Our example is tagged at $2,500. I hope this very collectable bass ends up with a musician who loves the Beatles as much as I do and puts it to work for at least another half-century.