Klowra Sprout

The Klowra Sprout (KBS-03) is a stereo modulation workstation: one pedal holding nine modulation algorithms, covering most of the classic modulation flavors a player reaches for. Instead of separate chorus, flanger, phaser, tremolo and filter pedals, the Sprout puts all of them, plus vibe, rotary and ring mod, in a single box with stereo outputs¹².

It is the third pedal in Klowra's Bloom Infinity Series, and it sells for $129 MAP/RRP¹. Under the hood it is digital, running Klowra's WildSeed engine, but the dry signal stays 100% analog from input to output¹².

A nine-mode modulation workstation

The nine modes are Vibe, Chorus, Multi-Chorus, Flanger, Filter, Phaser, Rotary, Tremolo and Ring Mod¹. That range means one pedal can cover the shimmer of a chorus, the sweep of a phaser, the whoosh of a flanger, the wobble of a Uni-Vibe style effect, and the pulse of a tremolo, along with less common ground like ring modulation.

At the center of the pedal is what Klowra calls the TEXTURE control. Pedal of the Day describes it as giving "intuitive access to deeper sound shaping," transforming each algorithm in its own way: vintage-inspired chorus character, enhanced phaser feedback, flanger resonance, and stereo spatial movement². In the Vibe mode specifically, Texture increases feedback and intensity¹. So the same knob means something different in every mode, which is what separates a workstation like this from nine fixed circuits.

The RATE knob sets the modulation speed, with rhythm options of quarter note, dotted eighth note, or eighth-note triplet¹.

Power and connections

The Sprout runs on a 9V DC center-negative power supply and draws 250mA¹. There is no battery option at that current draw, and 250mA is enough that sharing a daisy chain with a row of low-current analog pedals is worth thinking about before you build around it.

Connections are fully stereo: two 1/4" TS instrument inputs and two 1/4" TS instrument outputs, with dry/wet separation and true stereo outputs¹. Pedal of the Day notes the pedal offers multiple stereo output modes². Input impedance is 500k Ohm and output impedance is 100 Ohm¹. A USB-C hardware interface sits on the top edge¹.

The CTRL / EXP port accepts either a TS/TRS momentary footswitch or a TRS expression pedal, and can target the ramping parameters, Attack and Release¹. Pedal of the Day also lists TS/TRS external control support, expression pedal compatibility, tap tempo, and a Ramp Modulate feature². Tap tempo subdivisions are quarter note, dotted eighth note, or eighth-note triplet¹.

The enclosure is aluminum alloy, measuring 54.7mm H x 124.8mm D x 69.2mm W (2.0"H x 4.9"D x 2.7"W) and weighing 445 grams¹. It is made in China¹.

What reviewers said

Guitar Pedal X's Stefan Karlsson reviewed the Sprout in July 2025 and graded the modes individually. He found the two chorus voicings and the phaser genuinely excellent, well balanced and textured, and placed those three modes in his "A Tier," calling them "all-round top tier quality"¹.

Pedal of the Day reviewed the Sprout in September 2026 and was equally positive about the brand's output²³:

In a later Pedal of the Day verdict covering several Klowra pedals, the reviewer wrote that the Everlast Stereo Delay, Limbo Stereo Reverb and Sprout Stereo Modulation "have blown me away"³. Klowra's other reviewed pedals include the Rilum multi-head tape delay.

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