How to make a Bassman, Twin, or Super Reverb sound more Experienced.
In my July column about achieving classic sounds with various Fender amp and guitar pairings, I briefly mentioned the black-panel Bassman as a tonal gateway for Hendrix fans. Let me go a bit deeper into the topic of chasing Jimi's tones with Fender tube amps.
Most players might think they need a Marshall to emulate Hendrix, and that Fenders are way too clean, bright, and twangy for the sustaining distortion and feedback. That is partly, but not completely, true. Hendrix's crazier lead tones did not come from his amps alone, but from amps and pedals paired in the studio, and he played a lot of Fender amps. I think learning Jimi's picking technique and chordal approach are more important than learning to cop his tone, and, according to biographies, he actually wasn't very much focused on gear. Still, he did create a signature sound and I've developed ways to dial it in.
Early in his career, Hendrix played Fender and Sunn amps, among others. But in most photos that were taken of him onstage, he is holding a Strat in front of Marshall stacks with Super Lead or JTM45 heads. Let's look a bit closer at the JTM45. When released in 1962, the circuit was based on the 1958 to 1960 Fender Bassman—a 40-watt, tube-rectified, dual 5881-tube, push/pull amp feeding four Jensen 10" P10R alnico speakers in a combo-style cabinet. In fact, it was almost identical.
Fender's narrow-panel tweed amps have inspired numerous amp builders and manufacturers, right to this day, and the most famous are probably the 5F6-A circuit Bassman, 5e3 Deluxe, and 5E8-A Twin. In my opinion, they are the best-looking guitar amps of all time and they excel at both clean and crunchy tones.
The Bassman has several EQ possibilities through its airy 4x10 cabinet, with full-spectrum tone and crunch that makes it a great Hendrix-style amp when pushed. The most significant change in the JTM45 was the closed-speaker cabinet with 12" Celestion G12Ms in pairs or quads. Jim Marshall did this to make his amp louder, firmer, and punchier, but it also became more mid-focused. A bigger power transformer added further to the punch and firmness. A 12AX7 in the V1 preamp spot instead of a weaker 12AY7 also made the amp louder but did not change the tone. There were minor changes in EQ cap values and the negative feedback resistor, partly because of component availability. That made the tone controls act differently, with more mids in both the bass and treble pots. Summarized, the JTM45 is louder and has more mids and therefore more distortion. However, I think most players would not tell these amps apart in a blind test if they were played through the same speaker cabinet.
Out of respect for history, you should never remove an original Jensen speaker in a vintage Fender amp unless it's seriously damaged.
So, my advice for getting Jimi's tone with the tweed Bassman, vintage or reissue, is to lower the bass to prevent fart-out, set the volume high for a raw, unfiltered sound, and use the guitar volume to dial back to a cleaner and more mellow voice. If you manage to tame the brightness across the amp, pedals, and guitar, you will be greatly rewarded with a detailed, nuanced response to picking, fretting, bending, vibrato, and other work on the fretboard.
Staying in the tweed era, the 5E8-A circuit Twin is also useful for Hendrix-style distortion, and its 12" speakers will put you closer to a Marshall's solid punch. The Twin doesn't break up as quickly as the Bassman, but you can pull one of the two rectifier tubes to compensate, and get more sag and less clean headroom. The vintage tweed version of this amp has dual 5U4GA rectifier tubes, and the reissue has dual 5U4GBs. Thanks to Fender for not going with a more efficient single GZ34 but keeping it essentially vintage-correct.
Fender has reissued the tweed Bassman and low-power Twin as the '59 Bassman LTD and '57 Custom Twin-Amp. You can put vintage-appropriate Celestion G12M speakers in the reissue Twin for a more classic Marshall-style tone. For the reissue Bassman, I think the best route to a Hendrix tone is replacement WGS 10" Veteran speakers. But a word of caution: Out of respect for history, you should never remove an original Jensen speaker in a vintage Fender amp unless it's seriously damaged.
Finally, we've come to the black-panel/silver-panel Fender Bassman 50-watt and the Super Reverb. Of the three black-panel Bassman circuits—AA864, AA165, and AB165—the AB165 distorts the most. But it lacks a British flavor unless you install a 25k mid pot in place of the fixed 6.8k mid resistor. The mid knob then acts as a crunch control, so it's definitely worth the effort of installation. The black-panel Super Reverb with Jensen P10R or CTS ceramic speakers is quite similar to the Tweed Bassman. If you dial the mids high, lower the bass, and push it really hard … you almost have a Tweed Bassman tone with combined distortion from the preamp, power amp, and speakers. As always, for more crunch at lower volumes you may disengage two of the speakers, use a 12AX7 V6 position phase inverter tube, and pull the V1 tube.
Go online to see my video exploring some of these sounds. Meanwhile, excuse me while I kiss the sky.
Watch Jens Mosbergvick put Hendrix mojo on his Fender Super Reverb, Marshall JMP50, and Fender Bassman, with some help from a Mythos Argos Octave Fuzz and a wah-wah. The Super has its original CTS ceramic speakers, the Marshall sports a pair of Celestion G12Ms, and the Bassman has its original two Oxford 12T6s.
[Updated 7/26/21]
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A menu of vintage-voiced, modulated, harmonic, and reverse delays makes an intriguing smorgasbord of echo textures.
An imaginative array of wild to rich and familiar echo textures. Darker EQ profile lends authenticity to tape-like effects. Smart, if somewhat cramped, control layout.
Harmonic delay mode can be cloying at most settings.
$249
Diamond Dark Cloud
diamondpedals.com
The art of using and building delays is, at this point, a discipline populated by a thousand little cults. Vintage-minded analogists, digital micromanagers, and seekers of chaos all live under this strange umbrella. What’s refreshing about Diamond’s Dark Cloud is the way it spans so many points on the echo spectrum without 30 push-buttons and an enclosure the size of a cigar box.
It does many of the things detail-minded sound crafters demand of their delays, like tap tempo and creating precise subdivisions fast. And while it’s a digital delay, it seems very carefully designed and EQ’d to feel very analog, vintage, patinated, and moody. Indeed, in many situations it proves worthy of its name.
Crafted for Controlled Chaos
The sturdy, Canada-built Dark Cloud is a nice study in design efficiency. While there are enough tightly packed controls and switches to make some players nervous, the Dark Cloud does a lot with four knobs, a mini-toggle, and two footswitches. The toggle doubles as a mode selector when you click down and a subdivision switch when you click up. Footswitches serve the function of tapping out tempo, instantaneously or momentarily doubling delay rate, or setting up the harmonic delay mode for octaves or fifths. And though the four knobs for delay time, mix, feedback, and modulation rate are ordinarily enough, each functions quite differently depending on the mode, making the Dark Cloud deceptively simple.
Softly Spoken Expansiveness
Tape mode is, needless to say, well suited for the Dark Cloud’s darkish tone profile. Repeats drift and dissolve into mist as the echo signal degrades, and in traditional sorts of tape delay settings (short-to-medium-length delays, a 50/50 mix, and anywhere from two to five repeats), the Dark Cloud maintains a responsiveness and a not-too-overbearing presence that are simultaneously spacey and subdued. But the tape setting is also fantastic at more extreme settings. Fast repeats mated to speedy modulations and maxed-out feedback levels yield results that sound like Joe Meek wrestling a Space Echo, and you can create many accelerating/decelerating oscillation effects that suggest the old Roland tape delay standard-bearer if you engage actively and in real time with the controls.
“Fast repeats mated to speedy modulations and maxed-out feedback levels yield results that sound like Joe Meek wrestling a Space Echo.”
Harmonic and octave-up effects paired with reverbs and delay have a way of generating polarizing effects. I am generally on the side of those who find that a little goes a long way, and that too much is a saccharine tone nightmare that evokes being eaten alive by Smurfs. If you want to be devoured by wee cannibals, that’s your business, and the Dark Cloud will go there, particularly if you run wild with the feedback control. But the pedal also makes space for mellower applications. I had great luck with slapback delay times, fast decay, moderate mix levels and modulation rates in the ballpark of a Leslie’s whirl. In this setting, the harmonic delay took on the feel of an old Vox or Farfisa organ tracking my chord melody. If you stray from the Duane Eddy zone on the fretboard, single-note melodies tend to bring out the harmonic delay’s more cloying side. However, if you dig the shimmering qualities associated with these effects, you’ll find the Dark Cloud is a rich source for them, especially if you tinker with the harmonizing fifth setting on the pedal.
The Dark Cloud’s reverse delay mode is the one where the dark and cloudy facets of its personality become really intriguing. Like the tape mode, it’s a great match for drive effects from mellow boosts to gnarly fuzz—whether you situate it upstream or downstream from the pedal. But using the effect in clean settings reveals a lot about how the pedal’s EQ emphasis and duskier repeats make reverse echoes more seamless, organic, and something closer to the effect of reverse tape, especially when you keep the modulation and feedback to a minimum. In this way, the Dark Cloud’s reverse delay betters that of many of its peers and makes echoes sound less like they were grafted on as an afterthought. The reverse-echo textures can also range to more mangled extremes. If you’re a fan of Daniel Lanois’ warped-echo-and-melting-tweed-Deluxe sounds, adding fuzzy gain and attenuating your guitar tone generates a spiraling, hazy distorted signal that sounds a little like a reel of 2" coated in dust and molasses. (There’s an audio sample of that kind of thing attached to the online version of this review.)
The Verdict
If I’d had my way, I would have nixed the Dark Cloud’s harmonic delay mode, stuck with the very nice tape and reverse modes, and charged a little less. Still, a lot of players will love the many strange high-pitched and pixilated sounds available via the harmonic mode. And together, the three modes add up to a uniquely varied echo unit that can see a player through many moods—from deeply psychedelic to hyperactively effervescent.
Balance: producer, hip-hop artist, movie sound designer, modular synth player, and member of Jogja Hip Hop Foundation.
While the pedal builders at Sehat Effectors are in the game for their love of the 6-string, they’ve since begun exploring what effects pedals mean to other kinds of instrumentalists.
This time, I’d like to share my perspective as a pedal builder on how our effects pedals—originally crafted with guitarists in mind—are experiencing an exciting evolution in use. Our customer base spans around the globe, and as it turns out, many of them aren’t guitarists. Instead, our pedals are finding their way into the hands of non-guitarist musicians like DJs, synth players, movie sound directors, and even drummers. Yes, a drummer once used one of my fuzz pedals in a drum miking setup—quite an extreme yet bold experiment! This made me wonder: How did such a phenomenon come about?
Most of the pedals I build are fuzz effects and other experimental types, all primarily tested within guitar setups. But then I visited a friend’s studio; he goes by “Balance” onstage. He’s a well-known musician and producer here in Indonesia, and a member of the hip-hop group JHF (Jogja Hip Hop Foundation). Now, here’s the kicker—Balance doesn’t play guitar! Yet, he’s one of my customers, having asked for a fuzz and modulation pedal for his modular synthesizer rig. Initially, I was skeptical when he mentioned his plans. Neither my team nor I are familiar with synthesizers, let alone Eurorack or modular formats. I know guitars and, at best, bass guitar. My colleague has dabbled with effects experimentation, but only within the guitar framework.
So, my visit to his studio was a chance to study and research how guitar effects pedals could be adapted to a fundamentally different instrument ecosystem. The following is an interview I did with Balance to get a deeper understanding of his perspective.
As a modular synthesizer user, aren’t all kinds of sounds already achievable with a synth? Why mix one with guitar effects?
Balance: Some unique sounds, like those from Hologram Effects’ Microcosm or the eccentric pedals from Sehat Effectors, are hard to replicate with just a synth. Also, for sound design, I find it more intuitive to tweak knobs in real-time than rely on a computer—direct knob control feels more human for me.
Are there challenges in integrating guitar pedals with a modular synthesizer setup? After all, their ecosystems are quite different.
Balance: There are indeed significant differences, like jack types, power supplies, and physical format. Modular synthesizers are designed to sit on a table or stand, while guitar pedals are meant for the floor and foot control. However, they share a common thread in the goal of manipulating signals, eventually amplified through a mixing board and amplifier. The workaround is using converters/adapters to bridge the connection.“If you’re a saxophonist who buys a guitar pedal, it’s yours to use however you like.”
Are you the only modular synth user combining them with guitar pedals?
Balance: Actually, I got the idea after seeing other musicians experiment this way. Effects like fuzz or distortion are iconic to guitar but absent in synthesizer sound options. I believe signal manipulation with fuzz or distortion is a universal idea that appeals to musicians creating music, regardless of their instrument.
This brief chat gave me new insight and sparked my curiosity about different frameworks in music-making. While I’m not yet tempted to dive into modular synths myself, I now have a clearer picture of how fuzz and distortion transcend guitar. Imagine a saxophonist at a live show using a pedalboard with a DigiTech Whammy and Boss Metal Zone—absurd, maybe, but why not? If you’re a saxophonist who buys a guitar pedal, it’s yours to use however you like. Because, in the end, all musicians create music based on their inner concerns—whether it’s about romance, friendship, political situations, war, or anger. Eventually, they will explore how best to express those concerns from many angles, and of course, “sound” and “tone” are fundamental aspects of the music itself. Good thing my partner and I named our company Sehat Effectors and not Sehat Guitar Works. Haha!
Featuring updated circuits for maximum fidelity, intuitive controls, and true stereo capabilities, this pedal offers a rich chorus effect with tube-like overdrive.
Rotary speaker cabinets impart a one-of-a-kind type of chorus effect. This pedal faithfully recreates the swirling textures and vintage warmth of those rotary cabinets. Tucked inside Keeley's laser cut aluminum case is a brand new set of circuit boards delivering the finest tone we've ever achieved.
Key Features of the Rotary
- Sculpt your rotary tones with our finest sounds to date
- Updated circuits for maximum fidelity
- Simple and intuitive controls for live and studio use
- New LED speed indicator - Become one with the sound
- True Stereo for perfect integration in modern rigs
- True or Buffered Bypass - Switchable on the fly
Sculpt Your Sound:
- Blend: Find the perfect mix between dry and wet signals for a subtle warble or a full-on sonic whirlpool.
- Drive: Dial in tube-like harmonic saturation that adds depth and character to your tone!
- Mid Boost: Three different EQ curves to fatten up the stereo chorus effect.
Rotary in Motion:
- Dual Speed: Choose between two distinct rotation speeds for classic slow warble or a more dramatic, fast chorus effect.
- Brake: Instantly slow down the rotation for a cool "stopping" effect, adding a dynamic touch to your playing.
- Adjustable Ramp: Control the speed transition between slow and fast for smooth or dramatic soundscapes.
- Large Speed Knob: Easily control the rotation speed for intuitive adjustments on the fly!
Seamless Integration:
- Light Show: Set the mood with the optional pulsing LED that reacts to the rotary effect, adding a touch of visual flair to your performance.exclamation
- Stereo Everywhere: This pedal boasts stereo ins and outs, allowing you to create lush, expansive soundscapes that perfectly complement modern rigs.
- True Bypass or Buffered Bypass: Choose between transparent signal switching or a buffered bypass for maintaining pristine tone in complex pedal chains!
Stunning Design for Effortless Use
- The Rotary is built with artfully designed circuitry and housed in a proprietary angled aluminum enclosure, ensuring both simplicity and durability. Like all Keeley pedals, it’s proudly designed and manufactured in the USA.
A mix of futuristic concepts and DeArmond single-coil pickups, the Musicraft Messenger’s neck was tuned to resonate at 440 Hz.
The idiosyncratic, Summer of Love-era Musicraft Messenger had a short-lived run and some unusual appointments, but still has some appreciators out there.
Funky, mysterious, and rare as hen’s teeth, the Musicraft Messenger is a far-out vintage guitar that emerged in the Summer of Love and, like so many heady ideas at the time, didn’t last too much longer.
The brainchild of Bert Casey and Arnold Curtis, Musicraft was a short-lived endeavor, beginning in San Francisco in 1967 and ending soon thereafter in Astoria, Oregon. Plans to expand their manufacturing in the new locale seemed to have fizzled out almost as soon as they started.
Until its untimely end, Musicraft made roughly 250 Messengers in various configurations: the mono-output Messenger and the flagship Messenger Stereophonic, both of which could come with the “Tone Messer” upgrade, a built-in distortion/fuzz circuit. The company’s first catalog also featured a Messenger Bass, a wireless transmitter/receiver, and various models of its Messenger Envoy amplifier, very few of which have survived, if many were ever made at all.
“To this day, even fans will sometimes call the decision to use DeArmonds the Messenger’s ‘Achilles’ heel.’”
Upon its release, the Messenger was a mix of futuristic concepts and DeArmond single-coil pickups that were more likely to be found on budget instruments than pricier guitars such as these. The Messengers often featured soapbar-style DeArmonds, though some sported a diamond grille. (To this day, even fans will sometimes call the decision to use DeArmonds the Messenger’s “Achilles’ heel.”) The Stereophonic model, like the one featured in this edition of Vintage Vault, could be plugged into a single amplifier as normal, or you could split the bridge and neck pickup outputs to two separate amps.
One of the beloved hallmarks of the guitars are their magnesium-aluminum alloy necks, which continue as a center block straight through the tailpiece, making the guitars relatively lightweight and virtually immune to neck warping, while enhancing their playability. Thanks to the strength of that metal-neck design, there’s no need for a thick heel where it meets the body, granting unprecedented access to the higher end of the fretboard.
This Stereophonic model could be plugged into a single amplifier as normal, or you could split the bridge and neck pickup outputs to two separate amps.
The neck was apparently also tuned to have a resonant frequency of 440 Hz, which, in all honesty, may be some of that 1967 “whoa, man” marketing continuing on through our modern-day guitar discourse, where this fact is still widely repeated on forums and in YouTube videos. (As one guitar aficionado to the next, what does this even mean in practice? Would an inaudible vibration at that frequency have any effect at all on the tone of the guitar?)
In any event, the combination of that metal center block—resonant frequency or not—the apple-shaped hollow wooden body of the guitar, and the cat’s-eye-style “f-holes” did make it prone to gnarly fits of feedback, especially if you engaged the Tone Messer fuzz and blasted it all through the high-gain amp stacks favored by the era’s hard rockers.
The most famous devotee of the Messenger was Grand Funk Railroad’s Mark Farner, who used the guitar—and its Tone Messer circuitry—extensively on the group’s string of best-selling records and in their defining live shows, like the Atlanta Pop Festival 1970 and their sold-out run at New York’s Shea Stadium in 1971. But even Farner had some misgivings.
The Messengers often featured soapbar-style DeArmonds, though some sported a diamond grille.
In a 2009 interview, he talked about his first test-run of the guitar: “After I stuffed it full of foam and put masking tape over the f-holes to stop that squeal, I said, ‘I like it.’” He bought it for $200, on a $25-per-pop installment plan, a steal even at the time. (He also made it over with a psychedelic paint job, befitting the era, and experimented with different pickups over the years.)
When these guitars were new in 1967, the Messenger Stereophonic in morning sunburst, midnight sunburst, or mojo red would have run you $340. By 1968, new stereo models started at $469.50. Recent years have seen prices for vintage models steadily increase, as the joy of this rarity continues to thrill players and collectors. Ten years ago, you could still get them for about $1,500, but now prices range from $3,000 to $6,000, depending on condition.
Our Vintage Vault pick today is listed on Reverb by Chicago’s own SS Vintage. Given that it’s the stereo model, in very good condition, and includes the Tone Messer upgrade, its asking price of $5,495 is near the top-end for these guitars today, but within the usual range. To those readers who appreciate the vintage vibe but don’t want the vintage price tag, Eastwood Guitars offers modern reissues, and eagle-eyed buyers can also find some very rare but less expensive vintage MIJ clones made in the late ’60s and early ’70s.
Sources: Reverb listing from SS Vintage, Reverb Price Guide sales data, Musicraft July 1, 1967 Price Schedule, 1968 Musicraft Catalog, Chicago Music Exchange’s “Uncovering The Secret Sounds of the 1967 Musicraft Messenger Guitar,” MusicPickups.com article on the Messenger.