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The Behringer BM-18M Cluster Box follows the grand tradition of analog modulation pedals inspired by the famous "Cluster Flux" universe from the Moogerfooger series. This is not just a simple discreet chorus to thicken a clean sound: the idea is to have a deep, wide, and lively modulation capable of ranging from subtle movement to almost synthetic textures. This philosophy is reflected in the generous controls, the dedicated Tap Tempo, and the openness to external controls (CV, MIDI), typical of hybrid guitar, studio, and machine setups.
The BM-18M is aimed at guitarists and bassists seeking an expressive analog modulation pedal, as well as producers and keyboardists looking for organic movement on pads, leads, or drums. In rock, funk, and pop, it delivers a wide chorus and a musical flanger for rhythms. In ambient, post-rock, indie, and electronic music, it becomes a true texture box: undulating vibrato, weightless flanger, controlled instabilities, and very inspiring "liquid" effects.
On stage, its format easily integrates into a pedalboard, while in the studio it shines with its ability to synchronize and be controlled like a creative device. If you like to automate, modulate, or "play" your effects in real time, the MIDI and CV compatibility are definitely among its strong points.
At the heart of the Cluster Box is a control section designed to shape the movement and density of the effect. The Rate and Amount knobs set the speed and depth of the modulation: perfect for going from a slight shimmer to a pronounced wobble. The Delay Time control affects the texture of the modulation (and the sense of width), while Feedback enhances resonance, with the typical flanger ability to become more incisive and "swirling" when the feedback is increased.
The Mix control (dry/wet) allows precise dosing of the effect portion: useful for preserving the attack and definition of the original signal, or conversely shifting to very wet textures. The Drive and Output Level controls complete the set to adjust saturation and output level, handy for thickening a sound, compensating for volume loss, or simply adapting the pedal to your chain (amp, audio interface, effects loop).
To vary the feel, the 6-position LFO waveform selector changes how the modulation "breathes": smoother and more regular, more edgy, or more chopped depending on the chosen waveform. And to stay musical live, the built-in Tap Tempo helps quickly lock the modulation to the song's tempo.
Regarding integration, the BM-18M is clearly designed for modern rigs: external control via CV, MIDI, USB-C, and expression pedal, plus a feedback insertion loop to place another effect in the regeneration path (ideal for experimental combinations). The Mono/Stereo outputs are configurable via a DIP switch to adapt the pedal to your routing (single amp, two amps, audio interface, etc.). Finally, compatibility with the Guitar Tribe app via USB-C facilitates editing and organizing your settings.
The BM-18M delivers modulation with an analog grain, offering a very "organic" sense of width and movement. In chorus mode, expect a thick, silky sound, perfect for widening a clean tone, adding body to arpeggios, or making a bass sound more enveloping. In flanger mode, the pedal remains musical at low feedback but can also become more dramatic: airy sweeps, pronounced notches, jet effects, and swirling textures. The vibrato emphasizes pitch variation, with an expressive character reminiscent of certain vintage studio treatments.
Dynamics are a strong point: the pedal responds well to playing dynamics, input level, and the Mix and Drive settings. It can remain subtle in a "rhythm guitar" context or become a sound design tool for atmospheres, intros, bridges, and production layers. In the spirit of Cluster Flux pedals, this type of modulation has been seen in rigs of artists ranging from Mac DeMarco to Thundercat, including Toro y Moi and The War on Drugs: in other words, the palette spans from groove to vast space, without being limited to traditional chorus uses.
