The Boss MO-2 is a Boss octave pedal, currently around $126.11. Close alternatives include the Meris MR Hedra and the Boss PS-6. It pairs well with the Fender Deluxe Reverb and the Marshall JTM45 45W Tube Guitar Amp 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.

What stands out

  • “Three distinct modes cover high-octave shimmer, rotary-organ blend, and low-octave depth with independent character”

    — from the reviews

  • “Use-case wise it suits ambient, experimental, and fusion players looking for distinctive harmonic layering beyond straight pitch shifting”

    — from the community notes

  • “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”

    — from the listing

  • “Stereo outputs with independent mono or stereo operation expand live and studio routing options”

    — from the reviews

  • “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 an…”

    — from the listing

Trade-offs

  • “Mode 2 organ-style modulation may be too distinctive for players who want more transparent pitch shifting”

    — from the reviews

  • “its standout weakness is that the blended overtone effect can obscure pick attack definition and”

    — from the community notes

  • octave
  • harmonic
  • overtone
  • stereo
  • rotary
  • pitch
  • modulation
  • harmonics
$126.11View on Reverb

Price updated Oct 25, 2026

Genres the Boss MO-2 is commonly used in

  • Experimental
  • Ambient
  • Post Rock
    citedInferred from shared tonal signals, not a stated genre tag.
  • Electronic
    citedInferred from shared tonal signals, not a stated genre tag.
  • Shoegaze
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the Boss MO-2

Fender Deluxe Reverb

Fender

13% match

Fender Deluxe Reverb's own bright character is the real reason this is worth trying

Comes later in the signal chain

Marshall JTM45 45W Tube Guitar Amp Head

amplifier

12% match

What Marshall JTM45 45W Tube Guitar Amp Head brings here leans toward transparent — that's worth building a pairing around

Comes later in the signal chain

Pedals that stack with the Boss MO-2

ZVEX Fuzz Factory

Zvex

8% match
$199via Reverb

ZVEX Fuzz Factory leans toward fuzzy, and that's a real, usable character to pair with

Comes later in the signal chain

Tech 21 SansAmp

Tech 21

8% match

Tech 21 SansAmp's own bright character is the real reason this is worth trying

Comes later in the signal chain

Alexander Pedals Radical Delay

Alexander Pedals

6% match
$189.45via Reverb

Keep Boss MO-2's octave voice out front: Alexander Pedals Radical Delay goes after Boss MO-2 in the signal chain so its pristine voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Caroline Guitar Company Meteore

Caroline Guitar Company

6% match

Put Caroline Guitar Company Meteore after Boss MO-2 in the signal chain, where it won't crowd Boss MO-2 — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Cheaper alternatives

Behringer Octavia Octave Fuzz

Behringer

48% similarity
$87.40via Reverb

Shared character: mono synth, definition, one octave

Boutique & premium upgrades

Death By Audio Micro Harmonic Transformer

Death By Audio

60% similarity
$200via Reverb

Shared character: mono synth, one octave, ambient

Death By Audio Octave Clang v2

Death By Audio

56% similarity
$225via Reverb

Shared character: mono synth, one octave

Electro-Harmonix Micro POG Polyphonic Octave Generator

Electro-Harmonix

54% similarity
$202.81via Reverb

Shared character: dry signal, one octave, signal chain

Roger Mayer Octavia Classic

Roger Mayer

51% similarity
$399via Reverb

Shared character: one octave, signal chain

Alexander Pedals Fever Pitch

Alexander Pedals

47% similarity
$299via Reverb

Shared character: one octave, stereo, ambient

Meris Enzo X

Meris

47% similarity
$599via Reverb

Shared character: mono, mono synth, one octave

Similar character

Meris MR Hedra

Meris

51% similarity

Shared character: dry signal, mono synth, one octave

Boss PS-6

Boss

48% similarity
$139.99via Reverb

Shared character: premier guitar, mono, one octave

Chase Bliss Onward

Chase Bliss Audio

45% similarity

Shared character: mono synth, stereo, ambient

Tycobrahe Octavia

Tycobrahe

44% similarity

Shared character: one octave

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 Meris MR Hedra, the Boss PS-6, the Chase Bliss Onward. Budget picks: Behringer Octavia Octave Fuzz. Boutique upgrades: Death By Audio Micro Harmonic Transformer, Death By Audio Octave Clang v2, Electro-Harmonix Micro POG Polyphonic Octave Generator.

What pairs well with the Boss MO-2?+

Strong matches from rig and tone-complementarity evidence: Fender Deluxe Reverb, Marshall JTM45 45W Tube Guitar Amp Head, ZVEX Fuzz Factory — Fender Deluxe Reverb's own bright character is the real reason this is worth trying.

How much does the Boss MO-2 cost?+

Around $126.11 (live listing price, updated Oct 25, 2026).

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