The Horizon Devices Flux Echo is a compact delay and reverb pedal in one box, built around three preset "voices" that pair a reverb character with a delay character. Horizon Devices, the company founded by Periphery guitarist Misha Mansoor, spent over two years designing, testing and tweaking it, drawing on Mansoor's extensive delay collection, which ranges from vintage tape echoes to modern crisp delays12.
It was announced at NAMM in January 2020 and was shipping by July 2020 at $1992. Delicious Audio noted it was the company's first foray into non-gain-related effects, since Horizon Devices had previously focused on gain pedals3.
What the Flux Echo does
The pedal combines reverb and delay in one stompbox, and the two effects are voiced together rather than as two independent blocks5. There is no separate delay time knob: delay time is controlled exclusively by the tap-tempo footswitch6. Holding that same footswitch freezes both the reverb and the delay in place, and when you release it, both decay as they were set1.
The controls are shared between the two effects:
| Control | What it does |
|---|---|
| Mix | Sets the wet/dry blend5 |
| Tone | Sets the overall tone of both effects at once5 |
| Reverb Decay | Sets the reverb's decay4 |
| Delay Feedback | Sets the delay's feedback4 |
| Flux Mode | Three-way toggle selecting one of three voices3 |
| Tap/Hold switch | Tap to set delay tempo, hold to freeze reverb and delay1 |
| Bypass switch | Tap to turn the pedal on or off, hold to enable or disable trails1 |
The three Flux voices
The Flux Mode toggle switch gives access to three distinct voices, each pairing a reverb with a delay type53:
- Ambient Reverb + Analog Delay. A warm, ambient reverb with clean analog delay repeats7.
- Modulated Reverb + Reverse Delay. A lightly modulated reverb with a smooth reverse delay7.
- Shimmer Reverb + Tape Echo. A shimmer reverb paired with a tape-style echo5.
Because each voice is a fixed pairing, you choose the combination rather than dialing in a reverb and delay independently. Guitar Pedal X described it as "a really cool combination EchoVerb with 3 killer modes, stereo ins and outs and smart footswitch action"4.
Trails, freeze and the footswitches
The two footswitches carry several functions beyond simple on and off:
- Tap/Hold switch: tap it to set your delay tempo, hold it to freeze both reverb and delay. Once you let go, both decay as set1.
- Bypass switch: tap to turn the Flux Echo on or off. Hold the bypass switch down while the pedal is on to enable or disable delay/reverb trails1.
The freeze function is the pedal's most distinctive trick: it holds the current reverb and delay sound in place while you keep the switch held, then lets it decay naturally when released1. Guitar.com described the tap-tempo footswitch as controlling delay time exclusively, with no separate time knob, and noted that holding this footswitch engages the freeze mode, holding the delay and reverb trail in place6.
Power and connections
The Flux Echo does not come with a power supply and cannot be powered via a 9 volt battery, only by external power sources. It requires 300 mA via a 9 volt DC center negative power supply1.
That 300 mA current draw is on the high side for a compact pedal, so check that your power supply can deliver it before daisy chaining it with other pedals1.
The pedal has mono and stereo inputs and outputs, and Horizon Devices says it is designed to work great with most setups, including traditional mono rigs, stereo rigs with multiple amps or instruments, and synthesizers1. MusicRadar also noted the mono and stereo outputs at launch2.
Where it came from
Horizon Devices is Misha Mansoor's company, and the Flux Echo was its first delay pedal, in development for two whole years before release25. The design took influence from Mansoor's extensive delay collection, which spans vintage tape echoes through modern crisp delays2. Delicious Audio described the project as the result of years of research and development plus community input3.
What reviewers said
At launch, Delicious Audio reported that demoing guitarists Rabea Massaad and Pete Thorn were "really into this pedal" overall3. Guitar World called it a "feature-rich compact" reverb and delay pedal3.
Videos
Pete Thorn
Horizon Devices
Horizon Devices
News
Questions
Does the Horizon Devices Flux Echo have trails?
Yes. Hold the bypass switch down while the pedal is on to enable or disable delay and reverb trails. With trails on, your repeats and reverb continue to ring out after you switch the pedal off instead of cutting abruptly.
How does the freeze function work on the Flux Echo?
Hold the Tap/Hold footswitch to freeze both the reverb and the delay at once. When you let go, both decay as they were set, so the frozen sound dissolves naturally back into your normal repeats and ambience.
Does the Flux Echo come with a power supply?
No. Horizon Devices states the Flux Echo does not come with a power supply and cannot run on a 9 volt battery. It requires 300 mA from a 9 volt DC center negative external supply, so plan for an adequate power source.
Is the Flux Echo stereo?
Yes. It has mono and stereo inputs and outputs and is designed to work with traditional mono rigs, stereo rigs with multiple amps or instruments, and synthesizers. It also works fine in a simple mono setup.
Sources (7)
- FLUX ECHO, Horizon Devices
- Misha Mansoor's Horizon Devices spent two years designing this delay pedal, MusicRadar, 2020-07-10
- Horizon Devices Flux Echo + Reverb, Delicious Audio, 2020-10-27
- Guitar Pedal X, Guitar Pedal X, 2024-02-05
- Misha Mansoor and Horizon Devices launch Flux Echo reverb and delay pedal, www.gearnews.com, 2020-07-09
- Horizon Devices launches the Flux Echo reverb/delay combo, Guitar.com, 2020-07-09
- Horizon Devices releases feature-rich, compact Flux Echo reverb and delay pedal, Guitar World, 2020-07-08