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Average Price: $190
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$150
$601+
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Based on price data from 4 merchants for "Keeley Bubble Tron Dynamic Flanger Phaser". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Dive into the sonic landscape with the Keeley Bubble Tron Dynamic Flanger Phaser, a multi-effects pedal inspired by the legendary Frank Zappa. This pedal is not your average flanger or phaser. It's dynamic, responding to your pick attack and strength, creating a unique experience with each strum.
The Bubble Tron has three modes of operation - Flanger, Phaser, and Random Stepped Filter, each providing a unique sound. The Flanger section is inspired by the MicMix DynaFlanger, used by Zappa himself, and starts and stops based on your guitar's signal. The Phaser section, known as DynaMoPhase, is a dual-phaser, with one having a set speed and the other being dynamic.
The Bubble Tron's Filter section isn't dynamic but offers a wide range of sonic possibilities with its Shape Control. With the Sensitivity Control, you can shape the bandpass filter, producing incredible keyboard-like sounds.
Handcrafted in Edmond, Oklahoma, this pedal offers a new dimension of sound to guitarists. Plug in, explore, and create your own unique sonic universe with the Keeley Bubble Tron Dynamic Flanger Phaser.
Key Features:
- Dynamic response to pick attack and strength
- Three modes of operation: Flanger, Phaser, Random Stepped Filter
- Inspired by the legendary Frank Zappa's sound
- Unique Sensitivity Control for bandpass filter shaping
- Handcrafted in Edmond, Oklahoma
- True bypass for signal integrity
- Robust metal housing for durability
- LED status indicator
- 6.3 mm mono jack input/output
- Requires 9 V DC power supply (not included)
- Current consumption: 65 mA
Product specs
| Pedal Type | Dynamic Flange plus Phaser |
| Analog/Digital | Digital |
| Inputs | 1 x 1/4" |
| Outputs | 1 x 1/4" |
| True Bypass | Yes |
| Power Source | 9V DC power supply (sold separately) |
| Power Usage | 65mA |
| Height | 2" |
| Width | 2.6" |
| Depth | 4.4" |
| Weight | 0.61 lbs. |
FAQs
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What effects does the Keeley Bubble Tron Dynamic Flanger Phaser offer?
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The Keeley Bubble Tron provides dynamic flanging and phasing effects, allowing for a wide range of modulation sounds. It combines these effects to create unique, swirling textures ideal for experimental and psychedelic music styles.
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Is the Keeley Bubble Tron suitable for both live and studio use?
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Yes, the Keeley Bubble Tron is versatile enough for live performances and studio recording, thanks to its dynamic modulation capabilities and true bypass design, which ensures signal integrity.
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Does the Keeley Bubble Tron require a specific power supply?
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The Keeley Bubble Tron requires a 9V DC power supply with a power usage of 65mA. Ensure you have a compatible power source, as it is sold separately from the pedal.
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Can the Keeley Bubble Tron Dynamic Flanger Phaser be used with a bass guitar?
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Yes, the Keeley Bubble Tron can be used with a bass guitar, providing rich modulation effects that enhance the tonal palette of bassists looking for creative soundscapes.
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How does the dynamic feature of the Keeley Bubble Tron affect its modulation effects?
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The dynamic feature of the Keeley Bubble Tron responds to your playing intensity, adjusting the modulation depth and rate based on your attack, offering a highly interactive and expressive experience.
Videos
Mike Hermans
Keeley BubbleTron Dynamic Flanger Phaser
Keeley BubbleTron Dynamic Flanger Phaser
Mike Hermans
Keeley Bubble Tron Dynamic Flanger/Phaser Pedal Demo
Sweetwater
Keeley Bubble Tron - Bank 2 'Secret' Settings
Keeley Electronics
Keeley Bubble Tron part II
Mike Hermans
Keeley Bubble Tron Dynamic Filter, Phaser, Flanger Demo (with All 6 Effects)
Do Noise
How I use the Keeley Bubble Tron
60 Cycle Hum
Keeley Bubbletron Modulation Filter, Phaser & Flanger Pedal - Review & Demo
PMTVUK
Keeley Bubble Tron - Virtually Vintage Filters Phasers and Flangers
Stompbox Breakdown
Keeley Electronics Bubble Tron Dynamic Flanger Phaser Guitar Effects Pedal Demo
Pedal of the Day
Reviews
PROS
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Offers a wide range of sounds from classic to bizarre
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Dynamic settings produce rich, responsive tones
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Internal switches for modern/vintage tones enhance versatility
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Capable of achieving sounds reminiscent of famous artists and bands
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Small footprint, doesn't take up much space on a pedalboard
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Three effects in one: Envelope Filter, Phaser, Flanger
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Encourages experimentation with different settings and techniques
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Suitable for live performance and studio recordings
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Highly recommended for guitarists seeking unique sound textures
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Preserves the nuances of playing, respecting the dynamics
CONS
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Internal switches require opening the pedal to adjust, which can be cumbersome
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Some users may find it less intuitive to dial in desired tones quickly
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Not all effects (e.g., Envelope Filter) appeal to every user
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Keeley Bubble Tron Dynamic Flanger Phaser.
Features and functionality
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The flanger mode includes a negative feedback option, which some users find essential for their sound preferences.
Source -
The "modern/vintage" switch affects the pedal's tone, with the vintage setting providing a mellow, rounded feel compared to the harsher modern mode.
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The pedal includes two hidden internal switches labeled "modern/vintage" and "bank 1/bank 2," offering additional tonal options not mentioned in the manual.
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The internal A-B switch alters effects significantly, but requires opening the pedal, making live changes cumbersome.
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The filter mode offers four waveform options, all featuring stepped waves rather than smooth transitions, providing a unique modulation experience.
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The Bubble Tron includes an internal dipswitch that accesses a second bank with traditional effects: regular envelope filter, 8-stage phaser, and regular flanger.
Source
Value and pricing
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Owners highlight the pedal's value due to its compact size and inclusion of both phaser and flanger effects, comparing favorably to the SolidGoldFX Apollo.
Source
Comparisons
Use cases and applications
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The filter mode features four LFO shape settings, resembling a synthy sample & hold filter, ideal for creating unique sci-fi sounds.
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The dynamic phaser mode allows for control over effect intensity through picking dynamics, ranging from subtle to deep phase effects based on playing style.
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Works effectively in psych-funk setups, covering phasing needs and replacing traditional wah pedals for Stratocaster users.
Source
User experience
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Owners report enjoying the filter mode on a random setting with high sensitivity for creative looping and experimentation.
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Despite some intimidating settings, it provides a range of usable sounds, suitable for artists inspired by Frank Zappa.
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Achieving unity gain requires setting the level knob near 4 o’clock, raising questions about intentional volume reduction.
Source
Mods and upgrades
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Users suggest a mix control would improve the filter mode, allowing more nuanced effect blending without adjusting settings too drastically.
Source
4.5 out of 5
Based on 1 Review and 5 Ratings
174
An awsome modulation pedal with a lot of special and classic sounds.
I was looking for a pedal wich hase more than 1 modulations with small footprint. After a lot of searching I found this beauty. It adds some spice to my sound when it's needed.
Preferred Settings + Usage:
I use the bank 2 wich has the classic sounds. I tweaked the knobs the way they work well with all 3 modes so now with a flick of a switch I have an excellent flanger, phaser and envelope filter.
Artist usage
Add artist
Keeley Bubbletron Envelope Flanger on Geordie's board. This replaced his Gonkulator around March 2019.
Listed on Larry's official Keeley artist page.
At 8:42 in the Reverb YouTube video titled "Modest Mouse's Gear Collection Is Totally Out There: First-Time Look at Ice Cream Party Studios," Isaac Brock is shown using the Keeley Bubble Tron Dynamic Flanger Phaser. The pedal can be seen above the POG with four knobs.
Listed on Nick's official Keeley artist page.
Listed on Bobb's official Keeley artist page.
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A picture shows that she uses a Bubble Tron. Also, she briefly mentions the pedal in 2019 interview with Premier Guitar.
I also have this crazy little pedal called a Bubble Tron. It’s this kooky flange, but it also does this weird, bubbly sound. It’s hard to describe. It randomly arpeggiates your guitar notes. So, I do that one just for fun, when we’re jamming and stuff.
“I start every film score by hunting for unique sounds. When I discovered the Loomer and Bubble Tron it was like a lightning bolt of inspiration. The color and flexibility of the Keeley pedals have really brought the guitar back into my scoring arsenal.”
Listed on Arun's official Keeley artist page.
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Keeley Bubble Tron Dynamic Flanger Phaser, it is most commonly used with the following gear.
Community setups
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