The Flamma FS23 is a dual-footswitch stereo octave pedal from Flamma that also carries onboard reverb and modulation1. It lists for $109.00 USD on Flamma's product page as of October 2026, with a second figure of $148.00 USD shown alongside the regular price1. A 9V power supply is included in the box1.
What it does to your sound
The core of the FS23 is its octave engine, and the review from Bass Musician Magazine gives a picture of how each part of it behaves. Reviewer Cláudio Ribeiro found the lower octave to be the pedal's strength2:
"The lower octave is tight, round, and free of the synthetic wobble that sometimes plagues digital pedals."
He described it as modern and deep, closer in character to the EBS Octabass, and noted that it sits well in a mix without turning into muddy low end2. The upper octave he found quite digital and bright, almost brittle on its own, but musical and expressive once blended with the dry signal or the sub-octave2.
Beyond the octaves, the reverb runs large:
"The reverb is unapologetically big, capable of going from subtle space to enormous, cinematic wash."
Controls and modes
Each octave has a dedicated tone control, though Ribeiro cautions not to expect dramatic EQ sweeps: the effect is mild, shifting the voicing slightly darker or thinner2. The knobs are plastic but he found they do not feel flimsy, and the overall construction inspires confidence2.
The pedal offers optional preset mode and real-time mode for different situations1. Preset mode works with the 3 saving slots, which hold the user's preset parameters for quick recall1. In practice that means you can store a favorite octave-plus-reverb combination and call it back between songs, or leave the pedal in real-time mode and shape the effect as you play.
Build and power
The FS23 sits in a metal chassis, and Ribeiro felt it makes the pedal seem like a much more expensive unit, with smooth, slightly resistant knobs2. Power comes from the included 9V supply1, so there is no need to source an adapter separately.
The FS23 lists for $109.00 USD on Flamma's product page, with a second price of $148.00 USD shown alongside the regular price1. It is available online at Amazon.com2.
What reviewers said
Bass Musician Magazine's November 2025 review judged the FS23 a smart, versatile octave pedal with clean tracking, a strong low end and a creative reverb and modulation section2. On the low octave specifically, Ribeiro wrote that "In this regard, the FS23 shines"2. The review positions it as covering both clean octave work and more creative sound-shaping through the reverb and modulation, which is a wider brief than a straight octaver carries2.
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Questions
Is the Flamma FS23 stereo?
Yes. Flamma describes the FS23 as a dual-footswitch stereo octave effect, so it is built for stereo setups from the ground up. Bass Musician Magazine's review also notes its stereo octave capabilities alongside onboard reverb and modulation, making it more than a simple octave-doubling pedal.
How many presets can the Flamma FS23 save?
The FS23 has 3 saving slots for quickly recalling the user's preset parameters, according to Flamma's product page. It also offers optional preset mode and real-time mode for different playing situations, so you can either store settings or adjust on the fly.
Does the Flamma FS23 come with a power supply?
Yes. Flamma's product page lists a 9V power supply as included with the FS23, so you do not need to budget for a separate adapter to get it running on a board or in a practice setup.
What is the difference between preset mode and real-time mode?
Flamma describes the two as optional modes for different situations. Preset mode lets you save and recall your own parameters using the pedal's 3 saving slots, while real-time mode is for adjusting the effect live as you play rather than recalling stored settings.
Does the Flamma FS23 have reverb?
Yes. Along with its octave effect, the FS23 carries onboard reverb and modulation. Bass Musician Magazine's reviewer described the reverb as unapologetically big, capable of going from subtle space to an enormous, cinematic wash.
Sources (2)
- FLAMMA FS23 Dual-Footswitch Stereo Octave Pedal, Flamma Innovation
- Review: Flamma FS23 Octave Pedal, Bass Musician Magazine, 2025-11-10
