The Kernom RIDGE Multi Overdrive is a wide-ranging multi overdrive pedal from the French company Kernom, covering everything from clean boost to high-gain distortion in one box. Rather than offering separate modes you switch between, its central MOOD knob seamlessly morphs between iconic drive styles, so a single turn takes you from pristine clean boost to thick, saturated distortion. Pedal of the Day's reviewer called it "another big box beauty from this French company" and "a wide-ranging beast of a pedal"1.
What the MOOD knob does
The MOOD knob is not just a gain control. As you turn it, the pedal passes through five distinct drive characters, each described by the reviewer1:
| MOOD position | Character |
|---|---|
| 1 | Ultra-dynamic clean boost, like an RC Booster, adds clarity and headroom without coloring your tone |
| 2 | Transparent and organic overdrive, Klon-inspired warmth, for pushing an amp into breakup |
| 3 | Expressive mid-boost overdrive, nails the Tube Screamer punch without excessive midrange honk |
| 4 | Articulated high-gain monster, adds sustain and compression for lead tones that cut through |
| 5 | Fuzzy overdrive tones, borderline fuzz, aggressive and wild, for grunge and alternative rock |
That span means the RIDGE reaches into several effect territories at once: the low end of the knob behaves like a boost pedal, the middle like a conventional overdrive, position 4 like distortion, and position 5 borders on fuzz. The reviewer summed up the range as "From Klon-like transparency to Tube Screamer warmth, from bluesy edge-of-breakup tones to modern high-gain saturation"1.
EQ, MIDI and expression control
Beyond the MOOD knob, the RIDGE carries a set of features aimed at players who run presets and larger rigs1:
- Advanced EQ section: sculpt your tone before and after the clipping stage, so you can shape the drive character on either side of the distortion itself1
- MIDI and preset control: save up to 128 presets and integrate the pedal seamlessly into your rig1
- Expression pedal input: morph between two drive settings in real time1
The expression input is the feature the reviewer singled out for enthusiasm:
"The expression pedal morphing is soooooo fun here, and. will absolutely lead to hours of tweaking, knob-twisting"
For players using an expression pedal, that means the RIDGE can sweep continuously between two saved drive characters mid-phrase, something a conventional overdrive with fixed knobs cannot do. And for players running a MIDI switcher, the 128 preset slots put the whole range of the MOOD knob, plus the EQ settings, under program control. The pedal sits closer in ambition to a multi-effects unit than to a single-purpose drive, though it is entirely an overdrive in function1.
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Questions
How many presets does the Kernom RIDGE store?
The RIDGE stores up to 128 presets. Combined with its MIDI control, that lets you save a full range of drive settings, from clean boost to high gain, and recall them across a gig or a studio session without re-dialing the knobs between songs.
Does the Kernom RIDGE have MIDI?
Yes. Pedal of the Day's review lists MIDI control as a feature, describing it as a way to integrate the pedal seamlessly into your rig. Together with the 128 preset slots, MIDI lets a MIDI-capable switcher or controller change the RIDGE's drive settings from song to song.
Does the Kernom RIDGE sound like a Klon or a Tube Screamer?
The reviewer describes the RIDGE's range as running from Klon-like transparency to Tube Screamer warmth. MOOD position 2 is described as transparent, organic and Klon-inspired, while position 3 is a mid-boost overdrive said to nail the Tube Screamer punch without excessive midrange honk.
What does an expression pedal do on the Kernom RIDGE?
Plug an expression pedal into the RIDGE's expression input and you can morph between two drive settings in real time, sweeping the pedal to move from one to the other as you play. The Pedal of the Day reviewer found the morphing very fun and said it leads to hours of tweaking and experimentation.
Sources (1)
- Kernom RIDGE Multi Overdrive, Pedal of the Day, 2026-07-17
