Stompboxtober Day 23 is here! Today’s prize is a pedal from J. Rockett Audio. Enter now and come back for more daily prizes!
J. Rockett Audio Designs PXO Phil X Signature Overdrive Pedal
The PXO was created as a live or studio tool. When we sent Phil the overdrive sample he found that it saved him in backline situations and provided him a drive that plays well with others.
The PXO is an overdrive/boost where you can select pre or post giving you variety in how you want to boost, EQ and overdrive. We have provided standard controls on the overdrive side such as Volume/Gain/Overdrive and EQ but on the boost side you have a separate Tilt EQ that allows you to EQ with simplicity. You can experiment by cascading in a pre or post situation and experiment from there. The PXO has a lush, thick feel to the bottom end and a smooth top end that begs you to dig into the note.
A 6L6 power section, tube-driven spring reverb, and a versatile array of line outs make this 1x10 combo an appealing and unique 15-watt alternative.
Supro Montauk 15-watt 1 x 10-inch Tube Combo Amplifier - Blue Rhino Hide Tolex with Silver Grille
The two-in-one “sonic refractor” takes tremolo and wavefolding to radical new depths.
Pros: Huge range of usable sounds. Delicious distortion tones. Broadens your conception of what guitar can be.
Build quirks will turn some users off.
$279
Cosmodio Gravity Well
cosmod.io
Know what a wavefolder does to your guitar signal? If you don’t, that’s okay. I didn’t either until I started messing around with the all-analog Cosmodio Instruments Gravity Well. It’s a dual-effect pedal with a tremolo and wavefolder, the latter more widely used in synthesis that , at a certain threshold, shifts or inverts the direction the wave is traveling—in essence, folding it upon itself. Used together here, they make up what Cosmodio calls a sonic refractor.
Two Plus One
Gravity Well’s design and control set make it a charm to use. Two footswitches engage tremolo and wavefolder independently, and one of three toggle switches swaps the order of the effects. The two 3-way switches toggle different tone and voice options, from darker and thicker to brighter and more aggressive. (Mixing and matching with these two toggles yields great results.)
The wavefolder, which has an all-analog signal path bit a digitally controlled LFO, is controlled by knobs for both gain and volume, which provide enormous dynamic range. The LFO tremolo gets three knobs: speed, depth, and waveform. The first two are self-explanatory, but the latter offers switching between eight different tremolo waveforms. You’ll find standard sawtooth, triangle, square, and sine waves, but Cosmodio also included some wacko shapes: asymmetric swoop, ramp, sample and hold, and random. These weirder forms force truly weird relationships with the pedal, forcing your playing into increasingly unpredictable and bizarre territories.
This is all housed in a trippy, beautifully decorated Hammond 1590BB-sized enclosure, with in/out, expression pedal, and power jacks. I had concerns about the durability of the expression jack because it’s not sealed to its opening with an outer nut and washer, making it feel more susceptible to damage if a cable gets stepped on or jostled near the connection, as well as from moisture. After a look at the interior, though, the build seems sturdy as any I’ve seen.
Splatterhouse Audio
Cosmodio’s claim that the refractor is a “first-of-its-kind” modulation effect is pretty grand, but they have a point in that the wavefolder is rare-ish in the guitar domain and pairing it with tremolo creates some pretty foreign sounds. Barton McGuire, the Massachusetts-based builder behind Cosmodio, released a few videos that demonstrate, visually, how a wavefolder impacts your guitar’s signal—I highly suggest checking them out to understand some of the principles behind the effect (and to see an ’80s Muppet Babies-branded keyboard in action.)
By folding a waveform back on itself, rather than clipping it as a conventional distortion would, the wavefolder section produces colliding, reflecting overtones and harmonics. The resulting distortion is unique: It can sound lo-fi and broken in the low- to mid-gain range, or synthy and extraterrestrial when the gain is dimed. Add in the tremolo, and you’ve got a lot of sonic variables to play with.
Used independently, the tremolo effect is great, but the wavefolder is where the real fun is. With the gain at 12 o’clock, it mimics a vintage 1x10 tube amp cranked to the breaking point by a splatty germanium OD. A soft touch cleans up the signal really nicely, while maintaining the weirdness the wavefolder imparts to its signal. With forceful pick strokes at high gain, it functions like a unique fuzz-distortion hybrid with bizarre alien artifacts punching through the synthy goop.
One forum commenter suggested that the Gravity Well effect is often in charge as much the guitar itself, and that’s spot on at the pedal's extremes. Whatever you expect from your usual playing techniques tends to go out the window —generating instead crumbling, sputtering bursts of blubbering sound. Learning to respond to the pedal in these environments can redefine the guitar as an instrument, and that’s a big part of Gravity Well’s magic.
The Verdict
Gravity Well is the most fun I’ve had with a modulation pedal in a while. It strikes a brilliant balance between adventurous and useful, with a broad range of LFO modulations and a totally excellent oddball distortion. The combination of the two effects yields some of the coolest sounds I’ve heard from an electric guitar, and at $279, it’s a very reasonably priced journey to deeply inspiring corners you probably never expected your 6-string (or bass, or drums, or Muppet Babies Casio EP-10) to lead you to.
Kemper and Zilla announce the immediate availability of Zilla 2x12“ guitar cabs loaded with the acclaimed Kemper Kone speaker.
Zilla offers a variety of customization to the customers. On the dedicated Website, customers can choose material, color/tolex, size, and much more.
The sensation and joy of playing a guitar cabinet
Sometimes, when there’s no PA, there’s just a drumkit and a bass amp. When the creative juices flow and the riffs have to bounce back off the wall - that’s the moment when you long for a powerful guitar cabinet.
A guitar cabinet that provides „that“ well-known feel and gives you that kick-in-the-back experience. Because guitar cabinets can move some serious air. But these days cabinets also have to be comprehensive and modern in terms of being capable of delivering the dynamic and tonal nuances of the KEMPER PROFILER. So here it is: The ZILLA 2 x 12“ upright slant KONE cabinet.
These cabinets are designed in cooperation with the KEMPER sound designers and the great people from Zilla. Beauty is created out of decades of experience in building the finest guitar cabinets for the biggest guitar masters in the UK and the world over, combined with the digital guitar tone wizardry from the KEMPER labs. Loaded with the exquisit Kemper Kone speakers.
Now Kemper and Zilla bring this beautiful and powerful dream team for playing, rehearsing, and performing to the guitar players!
ABOUT THE KEMPER KONE SPEAKERS
The Kemper Kone is a 12“ full range speaker which is exclusively designed by Celestion for KEMPER. By simply activating the PROFILER’s well-known Monitor CabOff function the KEMPER Kone is switched from full-range mode to the Speaker Imprint Mode, which then exactly mimics one of 19 classic guitar speakers.
Since the intelligence of the speaker lies in the DSP of the PROFILER, you will be able to switch individual speaker imprints along with your favorite rigs, without needing to do extensive editing.
The Zilla KEMPER KONE loaded 2x12“ cabinets can be custom designed and ordered for an EU price of £675,- UK price of £775,- and US price of £800,- - all including shipping (excluding taxes outside of the UK).
For more information, please visit kemper-amps.com or zillacabs.com.
The author in the spray booth.
Does the type of finish on an electric guitar—whether nitro, poly, or oil and wax—really affect its tone?
There’s an allure to the sound and feel of a great electric guitar. Many of us believe those instruments have something special that speaks not just to the ear but to the soul, where every note, every nuance feels personal. As much as we obsess over the pickups, wood, and hardware, there’s a subtler, more controversial character at play: the role of the finish. It’s the shimmering outer skin of the guitar, which some think exists solely for protection and aesthetics, and others insist has a role influencing the voice of the instrument. Builders pontificate about how their choice of finishing material may enhance tone by allowing the guitar to “breathe,” or resonate unfettered. They throw around terms like plasticizers, solids percentages, and “thin skin” to lend support to their claims. Are these people tripping? Say what you will, but I believe there is another truth behind the smoke.
It’s the shimmering outer skin of the guitar, which some think exists solely for protection and aesthetics, and others insist has a role influencing the voice of the instrument. Builders pontificate about how their choice of finishing material may enhance tone by allowing the guitar to “breathe,” or resonate unfettered. They throw around terms like plasticizers, solids percentages, and “thin skin” to lend support to their claims. Are these people tripping? Say what you will, but I believe there is another truth behind the smoke.
Nitrocellulose lacquer, or “nitro,” has long been the finish of choice for vintage guitar buffs, and it’s easy to see why. Used by Fender, Gibson, and other legendary manufacturers from the 1950s through the 1970s, nitro has a history as storied as the instruments it’s adorned. Its appeal lies not just in its beauty but in its delicate nature. Nitro, unlike some modern finishes, can be fragile. It wears and cracks over time, creating a visual patina that tells the story of every song, every stage, every late-night jam session. The sonic argument goes like this: Nitro is thin, almost imperceptible. It wraps the wood like silk. The sound is unhindered, alive, warm, and dynamic. It’s as if the guitar has a more intimate connection between its wood and the player's touch. Of course, some call bullscheiße.
In my estimation, nitro is not just about tonal gratification. Just like any finish, it can be laid on thick or thin. Some have added flexibility agents (those plasticizers) that help resist damage. But as it ages, old-school nitro can begin to wear and “check,” as subtle lines weave across the body of the guitar. And with those changes comes a mellowing, as if the guitar itself is growing wiser with age. Whether a tonal shift is real or imagined is part of the mystique, but it’s undeniable that a nitro-finished guitar has a feel that harkens back to a romantic time in music, and for some that’s enough.
Enter the modern era, and we find a shift toward practicality—polyurethane and polyester finishes, commonly known as “poly.” These finishes, while not as romantic as nitro, serve a different kind of beauty. They are durable, resilient, and protective. If nitro is like a delicate silk scarf, poly is armor—sometimes thicker, shinier, and built to last. The fact that they reduce production times is a bonus that rarely gets mentioned. For the player who prizes consistency and durability, poly is a guardian. But in that protection, some say, comes a price. Some argue that the sound becomes more controlled, more focused—but less alive. Still, poly finishes have their own kind of charm. They certainly maintain that showroom-fresh look, and to someone who likes to polish and detail their prized possessions, that can be a big plus.
“With those changes comes a mellowing, as if the guitar itself is growing wiser with age.”
For those seeking an even more natural experience, oil and wax finishes offer something primal. These finishes, often applied by hand, mostly penetrate the wood as much as coating it, leaving the guitar’s surface nearly bare. Proponents of oil and/or wax finishes say these materials allow the wood to vibrate freely, unencumbered by “heavy” coatings. The theory is there’s nothing getting in the way—sort of like a nudist colony mantra. Without the protection of nitro or poly, these guitars may wear more quickly, bearing the scars of its life more openly. This can be seen as a plus or minus, I imagine.
My take is that finishes matter because they are part of the bond we have with our instruments. I can’t say that I can hear a difference, and I think a myth has sprouted from the acoustic guitar world where maybe you can. Those who remove their instrument’s finish and claim to notice a difference are going on memory for the comparison. Who is to say every component (including strings) went back together exactly the same? So when we think about finishes, we’re not just talking about tone—we’re thinking about the total connection between musician and instrument. It’s that perception that makes a guitar more than just wood and wire. The vibe makes it a living, breathing part of the music—and you.