The Boss MO-2 is a Boss octave pedal, currently around $127.65. Close alternatives include the Roger Mayer Octavia Classic and the Boss PS-6. It pairs well with the Synergy SL2 Module and the Friedman BE-Mini Head.
Boss MO-2
Boss · pedal
The Boss MO-2 Multi-Overtone is a pitch-shifting and harmonics pedal using Multi-Dimensional Processing (MDP) technology to blend adjustable overtone harmonics with the dry signal. Three modes provide different harmonic combinations: Mode 1 adds one octave up with mild modulation, Mode 2 adds one octave up and one octave down with rotary-speaker-style modulation, and Mode 3 adds one octave down with upper harmonics and moderate modulation. Controls include Balance, Tone, Detune, and Mode. Mono and stereo outputs. Reviewed by Premier Guitar and MusicRadar.
- modulation
- octave
- overtone
- stereo
- rotary
- pitch
- harmonics
- mono
Price updated Aug 27, 2026
Genres the Boss MO-2 is commonly used in
- Experimental
- Ambient
- Post Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Shoegaze
cited
Inferred from shared tonal signals, not a stated genre tag. - Neo Soul
cited
Inferred from shared tonal signals, not a stated genre tag. - Electronic
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Boss MO-2
Synergy SL2 Module
Synergy
tonal matchRun Synergy SL2 Module into that transparent platform and it finally gets some high gain
Friedman BE-Mini Head
Friedman
tonal matchRun Friedman BE-Mini Head into that transparent platform and it finally gets some high gain
Egnater Tweaker 88 Head
Egnater
tonal matchInto a transparent tone, Egnater Tweaker 88 Head brings the low gain it's missing
Ceriatone 2202H
Ceriatone
tonal matchRun Ceriatone 2202H into that transparent platform and it finally gets some high gain
Friedman Jose LTD
Friedman
tonal matchFriedman Jose LTD's high gain fills in what this transparent tone doesn't make on its own
Hughes & Kettner Warp 7
Hughes & Kettner
tonal matchRun Hughes & Kettner Warp 7 into that transparent platform and it finally gets some high gain
Bad Cat Lynx 50
Bad Cat
tonal matchRun Bad Cat Lynx 50 into that transparent platform and it finally gets some high gain
Friedman Jose Arredondo
Friedman
tonal matchRun Friedman Jose Arredondo into that transparent platform and it finally gets some high gain
Pedals that stack with the Boss MO-2
Beetronics Nectar
Beetronics
24% matchThe transparent tone has headroom to spare — Beetronics Nectar gives it low gain to fill it with
Walrus Audio Eons
Walrus Audio
23% matchWalrus Audio Eons's low gain fills in what this transparent tone doesn't make on its own
Neunaber Wet Mono Reverb Pedal
pedal
10% matchNeunaber Wet Mono Reverb Pedal's pristine voice goes after Boss MO-2 in the signal chain — it's not there to compete with Boss MO-2's own modulated character — goes in the amp's FX loop (or last, into a clean amp)
Meris Polymoon
Meris
10% matchKeep Boss MO-2's modulated voice out front: Meris Polymoon goes after Boss MO-2 in the signal chain so its modulated voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Dr. Scientist Frazz Dazzler V2
Dr Scientist
tonal matchDr. Scientist Frazz Dazzler V2's fuzzy fills in what this transparent tone doesn't make on its own
Warm Audio Jet Phaser
Warm Audio
tonal matchInto a transparent tone, Warm Audio Jet Phaser brings the high gain it's missing
Demon FX Gladiator Double Preamp Just
Demon Fx
tonal matchRun Demon FX Gladiator Double Preamp Just into that transparent platform and it finally gets some low gain
Cry Baby Dunlop Cry Baby Classic GCB95F
Cry Baby
tonal matchInto a transparent tone, Cry Baby Dunlop Cry Baby Classic GCB95F brings the high gain it's missing
Cheaper alternatives
Boutique & premium upgrades
Electro-Harmonix Micro POG Polyphonic Octave Generator
Electro-Harmonix
68% similarityShared character: dry_signal, one_octave, signal_chain
Electro-Harmonix POG2 Polyphonic Octave Generator
Electro-Harmonix
67% similarityShared character: mono_synth, one_octave, ambient
Alexander Pedals Fever Pitch
Alexander Pedals
66% similarityShared character: one_octave, stereo, ambient
Eventide PitchFactor
Eventide
64% similarityShared character: stereo, ambient, live
Zvex Jonny Octave
Zvex
63% similarityShared character: one_octave, transparent
Death By Audio Micro Harmonic Transformer
Death By Audio
95% similaritysimilar tone character
Similar charactersee all similar tone character →
Roger Mayer Octavia Classic
Roger Mayer
68% similarityShared character: one_octave, signal_chain
Boss PS-6
Boss
68% similarityShared character: mono, premier_guitar, one_octave
Roger Mayer Octavia
Roger Mayer
67% similarityShared character: one_octave, live
Tycobrahe Octavia
Tycobrahe
67% similarityShared character: one_octave
Meris MR Hedra
Meris
94% similaritysimilar tone character
Beetronics Whoctahell V2 Low Octave Beeast
Beetronics
93% similaritysimilar tone character
See all alternatives to the Boss MO-2 (cheaper + boutique) →
Questions people ask
What are good alternatives to the Boss MO-2?+
The closest matches in character are the Roger Mayer Octavia Classic, the Boss PS-6, the Roger Mayer Octavia. Budget picks: Behringer Octavia Octave Fuzz, Boss OC-3 Super Octave. Boutique upgrades: Electro-Harmonix Micro POG Polyphonic Octave Generator, Electro-Harmonix POG2 Polyphonic Octave Generator, Alexander Pedals Fever Pitch.
What pairs well with the Boss MO-2?+
Strong matches from rig and tone-complementarity evidence: Synergy SL2 Module, Friedman BE-Mini Head, Egnater Tweaker 88 Head — Run Synergy SL2 Module into that transparent platform and it finally gets some high gain.
How much does the Boss MO-2 cost?+
Around $127.65 (live listing price, updated Aug 27, 2026).