AI-powered features provide convenient guitar playing and learning; Computational audio delivers detailed tone; Bluetooth streaming and battery power round out the experience.
Positive Grid reveals Spark GO – a rugged, ultra-portable guitar/bass amp and Bluetooth speaker with advanced acoustics that delivers detailed, room-filling sound. With its smart app integration, this tiny powerhouse offers immediate access to inspiring guitar gear and tones plus AI-powered practice tools, for frictionless guitar playing and learning experiences.
Stream music or play guitar or bass – the pocket-sized Spark GO delivers 5 Watts of surprisingly big sound. Computational audio, a passive radiator and anti-vibration technology provide the detailed audio, punchy bass and overall sound experience typically found in a much larger guitar amp. Convenient, rechargeable battery power delivers great tone at a moment’s notice, for even more musical enjoyment.
Spark GO comes fully loaded with 33 authentic amp models and 43 effects and pedals that can be combined into an infinite number of tone setups for convenient guitar practice and jamming. Four onboard preset locations allow instant recall of favorite amps and effects.
Though compact in size, Spark GO offers powerful features for practicing and playing guitar through seamless integration with the award-winning Spark app. This free companion app is a fun and easy-to-use portal that encourages learning and provides more motivation to play and try new ideas. Users can find immediate inspiration from massive tone and gear libraries; fine tune their skills with real-time, AI-powered features; and even create performance videos.
- Auto Chords uses AI-powered technology to analyze millions of songs and display the guitar chords in real time for fun, easy learning.
- Fingertip access to over 50,000 guitar tones – all instantly available on Positive Grid’s online ToneCloud community.
- Smart Jam listens to the user’s playing and uses AI tech to learn their tone and style, then generates a drum & bass backing track to play along with.
- Video capture allows users to record themselves playing within the Spark app and then post it instantly to social channels with brilliant sound and video.
- Use Spark GO as an audio interface to record musical ideas to a computer.
Laura B. Whitmore, SVP of Marketing for Positive Grid, enthuses, “Stream your favorite music, learn a new guitar song, warm up for your gig. The portable Spark GO is a powerhouse in every sense of the word and a great all-around amp and companion. You’ll be shocked at its solid build and big sound. Use it anywhere to enjoy more guitar moments; it’ll inspire you to play every day!”
Lay Spark GO flat for room-filling, omnidirectional sound, or sit it upright for loud, focused audio. It can also be used with headphones for a quiet, immersive experience or with the Line Out for expanded audio possibilities. Smart EQ settings further optimize the output for instruments or music listening.
Spark GO: Nothing can stop you now
Spark GO brings high quality tone everywhere, thanks to its sturdy build and eight hour battery life (at half output). In addition to a classic woven front grille, it also comes with a roadworthy black hardshell grille and a durable duo-tone carry strap. Spark GO joins the Spark family of smart practice amps that includes the #1 best-selling Spark 40 and the portable, customizable Spark MINI
Starting in late March, Spark GO will be available for pre-order for a special price of USD $109 (MSRP USD $149).
For more information, please visit positivegrid.com.
- Positive Grid BIAS for iPad Review ›
- Positive Grid Presents the Spark MINI Zakk Wylde Edition ›
- Positive Grid BIAS Rack Review ›
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.
You may know the Gibson EB-6, but what you may not know is that its first iteration looked nothing like its latest.
When many guitarists first encounter Gibson’s EB-6, a rare, vintage 6-string bass, they assume it must be a response to the Fender Bass VI. And manyEB-6 basses sport an SG-style body shape, so they do look exceedingly modern. (It’s easy to imagine a stoner-rock or doom-metal band keeping one amid an arsenal of Dunables and EGCs.) But the earliest EB-6 basses didn’t look anything like SGs, and they arrived a full year before the more famous Fender.
The Gibson EB-6 was announced in 1959 and came into the world in 1960, not with a dual-horn body but with that of an elegant ES-335. They looked stately, with a thin, semi-hollow body, f-holes, and a sunburst finish. Our pick for this Vintage Vault column is one such first-year model, in about as original condition as you’re able to find today. “Why?” you may be asking. Well, read on....
When the EB-6 was introduced, the Bass VI was still a glimmer in Leo Fender’s eye. The real competition were the Danelectro 6-string basses that seemed to have popped up out of nowhere and were suddenly being used on lots of hit records by the likes of Elvis, Patsy Cline, and other household names. Danos like the UB-2 (introduced in ’56), the Longhorn 4623 (’58), and the Shorthorn 3612 (’58) were the earliest attempts any company made at a 6-string bass in this style: not quite a standard electric bass, not quite a guitar, nor, for that matter, quite like a baritone guitar.
The only change this vintage EB-6 features is a replacement set of Kluson tuners.
Photo by Ken Lapworth
Gibson, Fender, and others during this era would in fact call these basses “baritone guitars,” to add to our confusion today. But these vintage “baritones” were all tuned one octave below a standard guitar, with scale lengths around 30", while most modern baritones are tuned B-to-B or A-to-A and have scale lengths between 26" and 30".)
At the time, those Danelectros were instrumental to what was called the “tic-tac” bass sound of Nashville records produced by Chet Atkins, or the “click-bass” tones made out west by producer Lee Hazlewood. Gibson wanted something for this market, and the EB-6 was born.
“When the EB-6 was introduced, the Bass VI was still a glimmer in Leo Fender’s eye.”
The 30.5" scale 1960 EB-6 has a single humbucking pickup, a volume knob, a tone knob, and a small, push-button “Tone Selector Switch” that engages a treble circuit for an instant tic-tac sound. (Without engaging that switch, you get a bass-heavy tone so deep that cowboy chords will sound like a muddy mess.)
The EB-6, for better or for worse, did not unseat the Danelectros, and a November 1959 price list from Gibson hints at why: The EB-6 retailed for $340, compared to Dano price tags that ranged from $85 to $150. Only a few dozen EB-6 basses were shipped in 1960, and only 67 total are known to have been built before Gibson changed the shape to the SG style in 1962.
Most players who come across an EB-6 today think it was a response to the Fender Bass VI, but the former actually beat the latter to the market by a full year.
Photo by Ken Lapworth
It’s sad that so few were built. Sure, it was a high-end model made to achieve the novelty tic-tac sound of cheaper instruments, but in its full-voiced glory, the EB-6 has a huge potential of tones. It would sound great in our contemporary guitar era where more players are exploring baritone ranges, and where so many people got back into the Bass VI after seeing the Beatles play one in the 2021 documentary, Get Back.
It’s sadder, still, how many original-era EB-6s have been parted out in the decades since. Remember earlier when I wrote that our Vintage Vaultpick was about as original as you could find? That’s because the model’s single humbucker is a PAF, its Kluson tuners are double-line, and its knobs are identical to those on Les Paul ’Bursts. So as people repaired broken ’Bursts, converted other LPs to ’Bursts, or otherwise sought to give other Gibsons a “Golden Era” sound and look ... they often stripped these forgotten EB-6 basses for parts.
This original EB-6 is up for sale now from Reverb seller Emerald City Guitars for a $16,950 asking price at the time of writing. The only thing that isn’t original about it is a replacement set of Kluson tuners, not because its originals were stolen but just to help preserve them. (They will be included in the case.)
With so few surviving 335-style EB-6 basses, Reverb doesn’t have a ton of sales data to compare prices to. Ten years ago, a lucky buyer found a nearly original 1960 EB-6 for about $7,000. But Emerald City’s $16,950 asking price is closer to more recent examples and asking prices.
Sources: Prices on Gibson Instruments, November 1, 1959, Tony Bacon’s “Danelectro’s UB-2 and the Early Days of 6-String Basses” Reverb News article, Gruhn’s Guide to Vintage Guitars, Tom Wheeler’s American Guitars: An Illustrated History, Reverb listings and Price Guide sales data.
Some of us love drum machines and synths, and others don’t, but we all love Billy.
Billy Gibbons is an undisputable guitar force whose feel, tone, and all-around vibe make him the highest level of hero. But that’s not to say he hasn’t made some odd choices in his career, like when ZZ Top re-recorded parts of their classic albums for CD release. And fans will argue which era of the band’s career is best. Some of us love drum machines and synths and others don’t, but we all love Billy.
This episode is sponsored by Magnatone
An '80s-era cult favorite is back.
Originally released in the 1980s, the Victory has long been a cult favorite among guitarists for its distinctive double cutaway design and excellent upper-fret access. These new models feature flexible electronics, enhanced body contours, improved weight and balance, and an Explorer headstock shape.
A Cult Classic Made Modern
The new Victory features refined body contours, improved weight and balance, and an updated headstock shape based on the popular Gibson Explorer.
Effortless Playing
With a fast-playing SlimTaper neck profile and ebony fretboard with a compound radius, the Victory delivers low action without fret buzz everywhere on the fretboard.
Flexible Electronics
The two 80s Tribute humbucker pickups are wired to push/pull master volume and tone controls for coil splitting and inner/outer coil selection when the coils are split.
For more information, please visit gibson.com.