Selenium, an alternative to silicon and germanium, helps make an overdrive of great nuance and delectable boost and low-gain overdrive tones.
Clever application of alternative materials that results in a simple, make-everything-sound-better boost and low-gain overdrive.
Might not have enough overdrive for some tastes (although that’s kind of the idea).
$240 street
Cusack Project 34 Selenium Rectifier Pre/Drive Pedal
cusackmusic.com
The term “selenium rectifier” might be Greek to most guitarists, but if it rings a bell with any vintage-amp enthusiasts that’s likely because you pulled one of these green, sugar-cube-sized components out of your amp’s tube-biasing network to replace it with a silicon diode.
That’s a long-winded way of saying that, just like silicon or germanium diodes—aka “rectifiers”—the lesser-seen selenium can also be used for gain stages in a preamp or drive pedal. Enter the new Project 34 Selenium Rectifier Pre/Drive from Michigan-based boutique maker Cusack, named after the element’s atomic number, of course.
An Ounce of Pre-Vention
As quirky as the Project 34 might seem, it’s not the first time that company founder Jon Cusack indulged his long-standing interest in the element. In 2021, he tested the waters with a small 20-unit run of the Screamer Fuzz Selenium pedal and has now tamed the stuff further to tap levels of gain running from pre-boost to light overdrive. Having used up his supply of selenium rectifiers on the fuzz run, however, Cusack had to search far and wide to find more before the Project 34 could launch.
“Today they are usually relegated to just a few larger industrial and military applications,” Cusack reports, “but after over a year of searching we finally located what we needed to make another pedal. While they are a very expensive component, they certainly do have a sound of their own.”
The control interface comprises gain, level, and a traditional bright-to-bassy tone knob, the range of which is increased exponentially by the 3-position contour switch: Up summons medium bass response, middle is flat response with no bass boost, and down is maximum bass boost. The soft-touch, non-latching footswitch taps a true-bypass on/off state, and power requires a standard center-negative 9V supply rated at for least 5 mA of current draw, but you can run the Project 34 on up to 18V DC.
Going Nuclear
Tested with a Telecaster and an ES-355 into a tweed Deluxe-style 1x12 combo and a 65 Amps London head and 2x12 cab, the Project 34 is a very natural-sounding low-gain overdrive with a dynamic response and just enough compression that it doesn’t flatten the touchy-feely pick attack. The key adjectives here are juicy, sweet, rich, and full. It’s never harsh or grating.
“The gain knob is pretty subtle from 10 o’clock up, which actually helps keep the Project 34 in character.”
There’s plenty of output available via the level control, but the gain knob is pretty subtle from 10 o’clock up, which actually helps keep the Project 34 in character. Settings below there remain relatively clean—amp-setting dependent, of course—and from that point on up the overdrive ramps up very gradually, which, in amp-like fashion, is heard as a slight increase in saturation and compression. The pedal was especially fantastic with the Telecaster and the tweed-style combo, but also interacted really well with humbuckers into EL84s, which certainly can’t be said for all overdrives.
The Verdict
Although I almost hate to use the term, the Project 34 is a very organic gain stage that just makes everything sound better, and does so with a selenium-driven voice that’s an interesting twist on the standard preamp/drive. For all the variations on boost and low/medium-gain overdrive out there it’s still a very welcome addition to the market, and definitely worth checking out—particularly if you’re looking for subtler shades of overdrive.
Day 9 of Stompboxtober is live! Win today's featured pedal from EBS Sweden. Enter now and return tomorrow for more!
EBS BassIQ Blue Label Triple Envelope Filter Pedal
The EBS BassIQ produces sounds ranging from classic auto-wah effects to spaced-out "Funkadelic" and synth-bass sounds. It is for everyone looking for a fun, fat-sounding, and responsive envelope filter that reacts to how you play in a musical way.
A more affordable path to satisfying your 1176 lust.
An affordable alternative to Cali76 and 1176 comps that sounds brilliant. Effective, satisfying controls.
Big!
$269
Warm Audio Pedal76
warmaudio.com
Though compressors are often used to add excitement to flat tones, pedal compressors for guitar are often … boring. Not so theWarm Audio Pedal76. The FET-driven, CineMag transformer-equipped Pedal76 is fun to look at, fun to operate, and fun to experiment with. Well, maybe it’s not fun fitting it on a pedalboard—at a little less than 6.5” wide and about 3.25” tall, it’s big. But its potential to enliven your guitar sounds is also pretty huge.
Warm Audio already builds a very authentic and inexpensive clone of the Urei 1176, theWA76. But the font used for the model’s name, its control layout, and its dimensions all suggest a clone of Origin Effects’ much-admired first-generation Cali76, which makes this a sort of clone of an homage. Much of the 1176’s essence is retained in that evolution, however. The Pedal76 also approximates the 1176’s operational feel. The generous control spacing and the satisfying resistance in the knobs means fast, precise adjustments, which, in turn, invite fine-tuning and experimentation.
Well-worn 1176 formulas deliver very satisfying results from the Pedal76. The 10–2–4 recipe (the numbers correspond to compression ratio and “clock” positions on the ratio, attack, and release controls, respectively) illuminates lifeless tones—adding body without flab, and an effervescent, sparkly color that preserves dynamics and overtones. Less subtle compression tricks sound fantastic, too. Drive from aggressive input levels is growling and thick but retains brightness and nuance. Heavy-duty compression ratios combined with fast attack and slow release times lend otherworldly sustain to jangly parts. Impractically large? Maybe. But I’d happily consider bumping the rest of my gain devices for the Pedal76.
Check out our demo of the Reverend Vernon Reid Totem Series Shaman Model! John Bohlinger walks you through the guitar's standout features, tones, and signature style.
Reverend Vernon Reid Totem Series Electric Guitar - Shaman
Vernon Reid Totem Series, ShamanWith three voices, tap tempo, and six presets, EQD’s newest echo is an affordable, approachable master of utility.
A highly desirable combination of features and quality at a very fair price. Nice distinctions among delay voices. Controls are clear, easy to use, and can be effectively manipulated on the fly.
Analog voices may lack complexity to some ears.
$149
EarthQuaker Silos
earthquakerdevices.com
There is something satisfying, even comforting, about encountering a product of any kind that is greater than the sum of its parts—things that embody a convergence of good design decisions, solid engineering, and empathy for users that considers their budgets and real-world needs. You feel some of that spirit inEarthQuaker’s new Silos digital delay. It’s easy to use, its tone variations are practical and can provoke very different creative reactions, and at $149 it’s very inexpensive, particularly when you consider its utility.
Silos features six presets, tap tempo, one full second of delay time, and three voices—two of which are styled after bucket-brigade and tape-delay sounds. In the $150 price category, it’s not unusual for a digital delay to leave some number of those functions out. And spending the same money on a true-analog alternative usually means warm, enveloping sounds but limited functionality and delay time. Silos, improbably perhaps, offers a very elegant solution to this can’t-have-it-all dilemma in a U.S.-made effect.
A More Complete Cobbling Together
Silos’ utility is bolstered by a very unintimidating control set, which is streamlined and approachable. Three of those controls are dedicated to the same mix, time, and repeats controls you see on any delay. But saving a preset to one of the six spots on the rotary preset dial is as easy as holding the green/red illuminated button just below the mix and preset knobs. And you certainly won’t get lost in the weeds if you move to the 3-position toggle, which switches between a clear “digital” voice, darker “analog” voice, and a “tape” voice which is darker still.
“The three voices offer discernibly different response to gain devices.”
One might suspect that a tone control for the repeats offers similar functionality as the voice toggle switch. But while it’s true that the most obvious audible differences between digital, BBD, and tape delays are apparent in the relative fidelity and darkness of their echoes, the Silos’ three voices behave differently in ways that are more complex than lighter or duskier tonality. For instance, the digital voice will never exhibit runaway oscillation, even at maximum mix and repeat settings. Instead, repeats fade out after about six seconds (at the fastest time settings) or create sleepy layers of slow-decaying repeats that enhance detail in complex, sprawling, loop-like melodic phrases. The analog voice and tape voice, on the other hand, will happily feed back to psychotic extremes. Both also offer satisfying sensitivity to real-time, on-the-fly adjustments. For example, I was tickled with how I could generate Apocalypse Now helicopter-chop effects and fade them in and out of prominence as if they were approaching or receding in proximity—an effect made easier still if you assign an expression pedal to the mix control. This kind of interactivity is what makes analog machines like the Echoplex, Space Echo, and Memory Man transcend mere delay status, and the sensitivity and just-right resistance make the process of manipulating repeats endlessly engaging.
Doesn't Flinch at Filth
EarthQuaker makes a point of highlighting the Silos’ affinity for dirty and distorted sounds. I did not notice that it behaved light-years better than other delays in this regard. But the three voices most definitely offer discernibly different responses to gain devices. The super-clear first repeat in the digital mode lends clarity and melodic focus, even to hectic, unpredictable, fractured fuzzes. The analog voice, which EQD says is inspired by the tone makeup of a 1980s-vintage, Japan-made KMD bucket brigade echo, handles fuzz forgivingly inasmuch as its repeats fade warmly and evenly, but the strong midrange also keeps many overtones present as the echoes fade. The tape voice, which uses aMaestro Echoplex as its sonic inspiration, is distinctly dirtier and creates more nebulous undercurrents in the repeats. If you want to retain clarity in more melodic settings, it will create a warm glow around repeats at conservative levels. Push it, and it will summon thick, sometimes droning haze that makes a great backdrop for slower, simpler, and hooky psychedelic riffs.
In clean applications, this decay and tone profile lend the tape setting a spooky, foggy aura that suggests the cold vastness of outer space. The analog voice often displays an authentic BBD clickiness in clean repeats that’s sweet for underscoring rhythmic patterns, while the digital voice’s pronounced regularity adds a clockwork quality that supports more up-tempo, driving, electronic rhythms.
The Verdict
Silos’ combination of features seems like a very obvious and appealing one. But bringing it all together at just less than 150 bucks represents a smart, adept threading of the cost/feature needle.