Discover the sound-sculpting properties of bright caps and how to tame treble acoustically.
I enjoy clarity and chime, so I really like the open-top-end sound of a bright cap across the volume pot. Some folks do not and remove them, finding mellow mojo. What follows is an explanation of what bright caps are and how they work, plus general treble tips to consider on our journey from kilocycles to kilohertz.
When a guitar signal travels through an amp and encounters a large resistance, the high frequencies tend to sound more attenuated or shelved compared to the lower frequencies. Bright caps exist to restore this perceived loss of openness and treble. The features on most analog amps work by subtraction—throwing signal away (series resistance) to create an aural effect. Passive tone controls, reverb circuits, and volume controls are prime examples. Almost every classic guitar amp has a bright cap on the volume control. A volume potentiometer will typically be a 1-megaohm resistor with a variable tap/wiper. The top of the pot (the resistor) is connected to the signal source and the bottom is connected to ground (zero signal). The wiper sweeps between the two ends and is our variable output level—controlling the volume range, from silent to loud.
Vive la résistance! Let’s consider a loud-ish at-home playing level, with the volume set to 3. I’m visualizing a classic blackface Fender volume knob here. How does this setting translate into series resistance? It’s around 850,000 ohms! That’s 850k ohms in series to the wiper (output) and 150k ohms to ground: 1-megaohm total (Image 1). The snappy guitar signal enters the 850k resistance but sounds dull and flat once it passes through. How do we fix that? That’s where a bright cap comes in. A small-value capacitor—usually in the 47-to-250 pico farad (pF) range—is connected from the pot’s maximum signal point to the wiper output. Now the highs jump over the 850k resistance through the bright cap to the wiper and out to the next stage, creating sonic balance. In this example, a typical blackface signal passing through a 100 pF bright cap allows highs in the 2,000 Hz range and more to pass the resistor more easily. So, our guitar’s “air” and glassy leading edge is restored!
If you want more of a good thing, increase the bright cap’s value and the fast-lane frequency drops lower, allowing more and more upper-mid bite along with the shimmer. Or reduce the bright cap value for a rounder, softer sound. Often just a little is enough for clean tones. High-gain and classic British amps have big bright cap values of 500 pF up to 5000 pF (or .005 µF). Large bright caps like that over a 1-megaohm pot really push upper mids and give you searing overdrive. Such big cap values are generally not good for clean tones and can sound “honky” when you turn the volume down.
Many favored amps have bright caps. Fender Twins and Super Reverbs have a 10 pF bright cap over a 3.3-megaohm series signal resistor. In many Marshall amps there is a 500 pF bright cap over the 470k resistor leading to the second gain stage.
So how can we use this info? If you have an amp you feel is too edgy or bright for your taste, you can remove or change the value on one of these caps and see if you like the sound better. Volume pot bright caps are easy to experiment with. Try smaller values than stock for a more subtle lift in the top or go larger for more aggressive tones. You can also add a series resistor in line with your bright cap. This will pad down the bright cap’s effect and soften the leading edge. Note: If you don’t know how to discharge caps, then a tech is the way to go for safety’s sake. Bright cap mods are straightforward, so they should be affordable.
More treble tips. But before trying any internal mods, experiment with room position and treatment. You probably know this, but it’s worth repeating: single-coil pickups are brighter than humbuckers, bridge position pickups are brighter than neck position, pickups raised closer to the strings are brighter, rooms with exposed hard surfaces (glass, uncovered hardwood floors, sheet rock, or brick walls) are brighter than rooms with rugs and soft furnishings. Amps sitting on the floor positioned near walls or corners sound fuller and darker compared to amps away from walls, and amps on raised platforms (stands or chairs) or tilted up are brighter. If your amp sounds too bright, try placing a small rug under and in front of it while keeping the amp close to a wall. This can do a surprising amount of tone shaping, and it’s easier than digging into the circuitry. In a live band setting, put your amp up on a chair and think of it as your personal monitor. Lifting it off the ground will help your sound cut through and stay tight, plus it puts the speaker closer to your ear level. One more thing: Mid controls contain a lot of treble, too, so experiment with lowering mids to reduce treble.
WARNING:
All tube amplifiers contain lethal voltages. The most dangerous voltages are stored in electrolytic capacitors, even after the amp has been unplugged from the wall. Before you touch anything inside the amp chassis, it’s imperative that these capacitors are discharged. If you are unsure of this procedure, consult your local amp tech.
The original Roland Space Echo RE-201 is comparable in size to an amp head.
The majestic Roland Space Echo is having a bit of a resurgence. Here’s a breakdown on what makes it tick, and whether or not it’s right for you.
In this article, we delve into one of the most cherished gadgets in my guitar collection, the Roland Space Echo RE-201. This iconic piece of equipment has been used by legendary musicians like Jonny Greenwood, Brian Setzer, and Wata from Boris, which only heightened my desire to own one. A few years ago, I was fortunate to acquire a vintage RE-201 in good condition and at a reasonable price.
Using the RE-201 today has its advantages and disadvantages, particularly due to its size, which is comparable to an amplifier head. When compared to modern equivalents like delay pedals or software plugins that closely emulate the original, the vintage RE-201 can seem inefficient. Here, I share my personal and subjective experience with it.
The RE-201 is a tape echo/delay effect that gained popularity in the 1970s and ’80s. Unlike the more complex analog BBD delays or digital delays, tape delays use magnetic tape to simultaneously record and play back sound via a magnetic tape head (similar to a guitar or bass pickup). Because the recording head and playback head are in different physical locations, there is a time gap during the recording and playback process, creating the “delay” effect. This concept was first discovered by Les Paul in the 1950s using two tape machines simultaneously.
However, this method has a drawback: The magnetic tape used as a storage medium has a limited lifespan. Over time, the quality of the tape degrades, especially with continuous use. This degradation is marked by muddy, wavy sounds and unavoidable noise. Yet, this is precisely where the magic of real tape echo lies! New tapes produce clearer, hi-fi sounds, while older tapes tend to produce wavy sounds known as “modulated delay.” Additionally, increasing the number of tape-head readers extends the gap time/delay time of the output, and activating multiple tape-head readers simultaneously creates unique echo/delay patterns.
“This degradation is marked by muddy, wavy sounds and unavoidable noise. Yet, this is precisely where the magic of real tape echo/delay lies!”
Just as how fuzz and distortion effects were discovered, the “imperfections” of tape also represent a historical fact about how the creative process in music follows an absurd, non-linear, and unique pattern. In everyday practical life, signal delay is something typically avoided; however, in a musical context, delay adds a deeper dimension. Today, it’s hard to imagine a pedalboard without a delay effect at the end of the chain.
This uniqueness inspired me to create Masjidil Echo, embracing the “imperfection” of a vintage tape echo/delay with magnetic tape that hasn’t been replaced for years. Many newer pedals, such as the Boss RE-20, Strymon El Capistan, and the Catalinbread Echorec and Belle Epoch, draw inspiration from vintage tape repeat machines. Each has its unique interpretation of emulating tape echo, all in a more compact and maintenance-free format. Real tape delay requires periodic maintenance and has mostly been discontinued since the mid 1980s, with Roland ceasing production of the Space Echo entirely in 1985.
However, in recent years, interest in real tape echo has surged, perhaps due to nostalgia for past technology. As a result, many vintage delay units have appeared on marketplaces at increasingly gargantuan prices! If you’re considering acquiring one, I recommend thinking it over carefully. Are you prepared for the maintenance? Will you use it for regular performances? Are you ready for the fact that magnetic tape will become increasingly difficult to find, potentially turning your machine into a mere display piece? I don’t mean to instill fear, but the real deal, in my opinion, still can’t be fully emulated into a more practical and future-proof digital format.
So, I’ll leave you with one final question for consideration: What if the genealogy of technology were reversed chronologically, with multihead/multitap delay discovered digitally in the 1950s, and in the 2000s, a technological disruption led to the invention of mechanical tape echo to replace digital technology? Which would you choose?
In collaboration with Cory Wong, the Wong Press is a 4-in-1 Press pedal features Cory’s personal specs: blue & white color combination, customized volume control curve, fine-tuned wah Q range, and a dual-color STATUS LED strip indicating current mode/pedal position simultaneously.
In collaboration with Cory Wong, this Wong Press is a 4-in-1 Press pedal features Cory’s personal specs: Iconic blue & white color combination, customized volume control curve, fine-tuned wah Q range, and a dual-color STATUS LED strip indicating current mode/pedal position simultaneously.
Renowned international funk guitar maestro and 63rd Grammy nominee Cory Wong is celebrated for his unique playing style and unmistakable crisp tone. Known for his expressive technique, he’s been acclaimed across the globe by all audiences for his unique blend of energy and soul. In 2022, Cory discovered the multi-functional Soul Press II pedal from Hotone and instantly fell in love. Since then, it has become his go-to pedal for live performances.Now, two years later, the Hotone team has meticulously crafted the Wong Press, a pedal tailored specifically for Cory Wong. Building on the multi-functional design philosophy of the Soul Press series, this new pedal includes Cory’s custom requests: a signature blue and white color scheme, a customized volume pedal curve, an adjustable wah Q value range, and travel lights that indicate both pedal position and working mode.
Cory’s near-perfect pursuit of tone and pedal feel presented a significant challenge for our development team. After countless adjustments to the Q value range, Hotone engineers achieved the precise WAH tone Cory desired while minimizing the risk of accidental Q value changes affecting the sound. Additionally, based on Cory’s feedback, the volume control was fine-tuned for a smoother, more musical transition, enhancing the overall feel of volume swells. The team also upgraded the iconic travel lights of the Soul Press II to dual-color travel lights—blue for Wah mode and green for Volume mode—making live performances more intuitive and visually striking.
Features
- True Bypass
- 4 in 1 functionality (volume, expression, wah, volume/wah)
- New dual-color STATUS LED strip indicating pedal mode and position in real time
- Cory’s custom volume curve and wah Q control
- Classic-voiced wah tone with flexible tonal range
- Active volume design for keeping lossless tone
- Separate tuner and expression outputs for more connection possibilities
- 9V DC or 9V battery power supply
Introducing the Hotone Wong Press - Cory Wong's signature Volume/Wah/Expression Pedal - YouTube
Check the product page at hotone.com
Big time processing power in a reverb that you can explore for a lifetime.
An astoundingly lush and versatile reverb of incredible depth and flexibility. New and older BigSky algorithms included. More elegant control layout and better screen.
It’s pricey and getting the full use out of it takes some time and effort.
$679
Strymon BigSky MX
strymon.net
Strymon calls the BigSky MX pedal “one reverb to rule them all.” Yep, that’s a riff on something we’ve heard before, but in this case it might be hard to argue. In updating what was already one of the market’s most comprehensive and versatile reverbs, Strymon has created a reverb pedal that will take some players a lifetime to fully explore. That process is likely to be tons of fun, too.
Grinding out impressive DSP power via an 800 MHz tri-core ARM processor with 32-bit floating-point processing, the BigSky MX introduces seven brand-new reverb algorithms, allows users to load any compatible convolution reverb (or impulse response) as well as to use two reverbs simultaneously—in series, parallel, and split—plus it delivers several other mind-bending features. Given this wealth of goodies, it’s impossible to test and discuss every sound and function, but what we heard is exciting.
Infinite Space
The updated MX will look very familiar to those who know the original BigSky. The form factor is nearly identical, though the MX is a bit larger. Its control interface is similar too, albeit rearranged into a single row of knobs that looks more balanced. Rotary controls include decay, pre-delay, tone, mod, parameter 1, parameter 2, and mix. A value knob enables effect-level manipulation on the larger, clearer OLED screen. It also allows you to select between the older or “classic” algorithms from the original BigSky and the seven new ones. Three footswitches allow for preset selection, bank up or down (two switches pressed together), and an infinite hold/sustain switch that’s always available. The rotary “type” knob in the upper-left corner spins between 12 basic reverb voices. As with most things Strymon, many of these controls are multi-function.
Also very Strymon-like are the top-mounted, 5-pin DIN MIDI I/O connections, which come in handy if you want to maximize the pedal’s potential in a MIDI-controlled rig. But you can access more than enough right from the pedal itself to satisfy the needs of most standard pedalboard-based setups. A USB-C port enables computer connection for MIDI control via that route, use of the Nixie 2 editing app, or firmware updates.
There are stereo jacks for both input and output, plus a multi-function 1/4" TRS/MIDI expression jack for use with a further range of external controllers. The standard center-negative power jack requires a DC supply offering at least 500 mA of current draw.
It is utterly hypnotic and addictive once you settle in and work a little more intuitively.
Sky’s the Limit
The BigSky MX was, initially, a bit mind-boggling on account of the seemingly endless possibilities. But it is utterly hypnotic and addictive once you settle in and work a little more intuitively. Suffice it to say, the core quality of the reverb sounds themselves are excellent, and the sheer variety is astounding. Beyond the standard emulations, I really dug several permutations of the cloud reverb, the chorale mode (which adds tenor and baritone harmonizing tones), and bloom mode (which generates deep synthesizer-style pads), and I could have gotten lost in any of these for hours if there wasn’t so much more to explore. Among the highlights: There is now an option to pan reverbs across the stereo field. The MX also uses audio design concepts borrowed from tape delays to create rhythmic pattern-based reverbs, which is an excellent compositional tool.
The Verdict
This latest evolution of the already impressive and super-capable BigSky is the kind of pedal that could cause you to disappear into your basement studio, never to return. The sounds are addictive and varied and can be configured in endless creative ways. The programmability and connectivity are also superb. Additionally, the new algorithms weren’t added at expense of the old BigSky algos. There’s no doubt that it will be flat-out too much horsepower for the guitarist that needs a few traditional sounds and, perhaps, a few more spacious options. And it would be interesting to know what percentage of the pedal’s customers end up being synth artists, engineers, or sound designers of one kind or another. If you’re the kind of guitar player that enjoys stretching the sound and capabilities of your instrument as far as they will go, the BlueSky MX will gladly ride along to the bounds of your imagination. It may test the bounds of your budget, too. But in many ways, the BigSky MX is as much a piece of outboard studio gear as a stompbox, and if you’re willing to invest the time, the BigSky MX has the goods to pay you back.
“The Player II Series represents our continued evolution in design and functionality,” said Justin Norvell, EVP of Product, FMIC. “We listened to the feedback from musicians around the world and incorporated their insights to refine and innovate our instruments. The re-introduction of rosewood fingerboards is a restoration of the ‘original Fender recipe’ and will no doubt be a fan favorite - but we didn’t want to stop there. We’ve also incorporated our rolled fingerboard edges for a broken-in feel, upgraded hardware, and have some new body options as well- which underscores our commitment to providing players and creators with the tools they need to express their unique sound and style. The Player II Series is not just an upgrade, it's a detailed re-imagining of our core silhouettes, highlighting our dedication to quality and the continuous refinement of our instruments.”
Additionally, Player II offers new options for chambered ash and chambered mahogany bodies for the Player II Stratocaster and Telecaster models, which will be available in October. Designed for musicians ready to elevate their craft, the Player II Series sets a new standard for quality and performance in the mid-price range.
Fender Player II Stratocaster HSS Electric Guitar - Coral Red
Fender Player II Jaguar Electric Guitar - Aquatone Blue
