Boss MO-2 Multi Overtone

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$115.00 to $164.99 Price Tier: Standard

5.0 (13)

2 Critic Reviews

3 Reviews

This product is Vintage or Discontinued

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8 community setups

12 wishlisted

46 saved

Page last updated Jul 05, 2026

Pricing and availability

We compare 600+ stores and found this item at 7 stores. Prices updated July 5, 2026.

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5.0 (12)

$164.99

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5.0 (11)

$164.99

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5.0 (19)

$125.28 35 available New

$95.53 14 available Used

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5.0 (6)

$164.99

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$164.99

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4.4 (33)

$116.00 $115.00 $1.00 · All time low

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£114.50

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Average Price: $145

Standard/Professional

$100

$301+

Price Tier

In the Harmonizer & Octave Effects Pedals category, Boss MO-2 Multi Overtone is priced in the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

Budget

Standard

High-end

Price History

Based on price data from 5 merchants for "Boss MO-2 Multi Overtone". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Immerse yourself in the dynamic world of harmonics with the Boss MO-2 Multi Overtone. This pedal is your key to crafting a sonic landscape that's uniquely yours. Infused with Roland's innovative Multi-Dimensional Processing (MDP) technology, this pedal analyzes your guitar's audio signals in real time, applying the ideal effects to each. The result is a bold range of dynamic changes that will transform your sound into an exciting new voice.

The MO-2 doesn't just add effects, it enhances and thickens your original sound, building completely new voices based on your guitar's own rich harmonic characteristics. With three different modes to choose from, you have a spectrum of tone-shaping possibilities at your fingertips. The DETUNE knob further expands your creative palette, unlocking a wide array of impressive modulation effects. From the shimmery resonance of multi-string harmonics to flute-like transparency and powerful organ-like textures, the MO-2 delivers an array of unique sonic tools that add fresh dynamic resonance characteristics to your guitar.

Key Features:

Powered by Multi-Dimensional Processing technology (MDP)
Creates a wide range of extraordinary new sounds
Uses your guitar's harmonic characteristics as a starting point
Three different modes available for diverse tone-shaping options
DETUNE knob for unlocking a wide range of modulation effects
Produces distinctive and expressive tones
Rugged design and construction for durability
Stereo output for creating a lush and deep stereo sound

Owner's manual

Boss MO-2 Multi Overtone User Manual

Product specs

Pedal Type	Multi-string Overtones
Inputs	1 x 1/4"
Outputs	2 x 1/4"
Power Source	9V DC power supply required (sold separately)
Batteries	1 x 9V
Height	2.37"
Width	2.87"
Depth	5.12"
Weight	1 lbs.

FAQs

What kind of power supply does the Boss MO-2 Multi Overtone require?: The Boss MO-2 Multi Overtone requires a 9V DC power supply, which is sold separately. It can also be powered by a 9V battery.
Can the Boss MO-2 Multi Overtone be used with a bass guitar?: Yes, the Boss MO-2 Multi Overtone can be used with a bass guitar. It effectively enhances the harmonic content of bass tones, adding depth and texture.
How many modes does the Boss MO-2 Multi Overtone have?: The Boss MO-2 Multi Overtone features three distinct modes, each offering a unique range of overtones and detuning effects to expand your sound palette.
Does the Boss MO-2 Multi Overtone work well in a stereo setup?: Yes, the Boss MO-2 Multi Overtone is designed for stereo use with its dual 1/4" outputs, allowing for rich, spatial effects when connected to two amplifiers.
What are the main controls on the Boss MO-2 Multi Overtone?: The Boss MO-2 Multi Overtone features controls for Balance, Tone, and Detune level, enabling a variety of sounds from shimmering resonance to thick, synth-like tones.

Videos

Add video

BOSSchannel

BOSS MO-2 Multi Overtone [BOSS Sound Check]

BOSSchannel

Boss MO-2 Multi Overtone

ProGuitarShopDemos

Boss MO-2 Multi Overtone

Prymaxe

Afro Review - BOSS MO-2 (Multi Overtone) Effect Pedal

Rabea Massaad

Boss MO-2 Multi-Overtone - Yeah, But What Does It Do?

Stompbox Breakdown

BOSS MO-2 Multi Overtone Playing Examples with John 5

rolandmedia

Boss MO-2 Multi Overtone pedal audio/settings demo

Roland UK

Boss MO-2 Multi Overtone Pedal Demo

PMTVUK

BOSS MO-2 Multi Overtone Playing Examples with Jude Gold

rolandmedia

BOSS MO-2 Multi Overtone Guitar Effects Pedal

Gear4music Guitars

MM Presents - 90 Seconds With BOSS MO-2 MULTI OVERTONE

Musicmaker

Reviews

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PROS

Innovative MDP technology offers clarity and precision in tone
Stereo outputs for creating fuller, more lush sounds
Three distinct modes for versatile overtone textures
Compatible with a wide range of musical styles, from jazz fusion to ambient
Works well with other pedals, enhancing effects like fuzz, distortion, and echo/delays
Emulates organ-like tones effectively, adding depth to music without an organist
Unique sounds can emulate a 12-string guitar with a 6-string
Excellent tracking, particularly useful for bass players expanding into guitar territory
Offers a natural, less obtrusive alternative to similar pedals
Durable construction typical of Boss products

CONS

Mono input limits pedal board placement with other stereo effects
Some tones may not be widely usable, requiring careful setting adjustments
DeTuning feature may have limited applicability in certain genres or settings
Described by some as a one-trick pony compared to more versatile pedals

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Boss MO-2 Multi Overtone.

User experience

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Users note the MO-2's superior tracking speed compared to the EHX B9 Organ, which had issues with latency and volume spikes.
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Owners often re-buy the MO-2 after selling it, appreciating its irreplaceable sound and unique steel drum-like tones when used clean or with fuzz.
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Some users find the pedal excels at producing shoegazey tones, especially with PRS guitars.
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Comparisons

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The MO-2 is likened to the Terra Echo as a pedal that provides unique sounds not easily replicated with other gear.
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The Digitech Drop is recommended over Sub'n'Up for bass replacement, with faster tracking and better articulation.
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The MO-2 produces more natural organ-like tones than the TC Electronic Sub'n'Up, which offers greater customization with its TonePrint editor.
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The MO-2 is described as having better tracking than similar pedals, even under heavy distortion or fuzz.
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Use cases and applications

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The MO-2 is favored for "coloring" other effects rather than serving as a standalone effect, especially when paired with overdrive.
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The MO-2 can produce unique drones when used in a self-oscillating feedback loop, especially when combined with a Tensor for added movement and pitch shifting.
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The MO-2 excels in creating chimey upper octave and Hammond-like organ sounds, ideal for ambient and downtempo genres.
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The pedal adds harmonic content akin to distortion, enhancing overtones without typical distortion harshness.
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Works better with humbuckers or darker sounding guitars; may sound shrill on bright guitars like Telecasters.
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Features and functionality

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The pedal's stereo outputs can be creatively used for self-oscillation and looping, enhancing its experimental capabilities.
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The SY-1 requires additional pedals, like the MO-2, to fully realize its potential for organ and pad sounds.
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The MO-2 emphasizes overtones by acting as a sophisticated EQ/filter, boosting specific frequencies rather than pitch-shifting.
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Detune control and mode switch significantly influence the sound, mixing octaves and adding delay-like thickness.
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Mods and upgrades

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Setup with a Boss PW-10 using a custom low-pass filter enhances harmonic content when used with the MO-2.
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Critic Reviews

Boss MO-2 Multi-Overtone Pedal Review - Premier Guitar

premierguitar.com

The Boss MO-2 Multi-Overtone pedal is a versatile harmonizer that offers a range of octave effects with its multi-dimensional processing. It excels at creating unique harmonic textures and can add depth to both rhythm and lead guitar parts. The pedal is praised for its sturdy build and reliable performance, making it a durable choice for stage use. However, the lack of a dedicated speed control for the detune effect is a minor drawback. Overall, with its rich array of sounds and competitive pricing, the MO-2 is a solid option for those seeking to expand their tonal palette.

positive

Full Review

Review: Boss MO-2 Multi Overtone Pedal (World Exclusive First Look) (Video) - Sonic State Amped

sonicstate.com

The Boss MO-2 Multi Overtone pedal is a remarkable sound sculptor, transforming your guitar into an organ, 12-string, or a synth. Its compact design, with three settings and a versatile detune knob, offers a range of tones from sixties harmonics to powerful sub-octave synths. While it excels in sound variety and durability, the absence of multiple footswitches for seamless mode switching is a minor drawback. Despite this, the MO-2 is a versatile and fun tool for a myriad of musical styles, making it a standout among recent Boss releases.

positive

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5.0 out of 5

Based on 3 Reviews and 13 Ratings

5 star

4 star

3 star

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1 star

phil_isix

751

about 9 years ago

Great effects pedal

Different from octaver and harmonizer buy you can get frequencies between these two effects without the inconvenients nor advantages so it's completed different but it has its place in a pedal board without problem..... you can put it in front of the amp ... but ......... it's place in the loop by the classical SEND / RETURN is also completely different ... try it and before the modulation fx , and before delay and reverb ....... this is not bad .... in the contrary ........ surprising ......

Roles:

Guitarist Bassist Keyboardist

Genres:

Rock Pop Folk, World, & Country

luis_carballo_caycedo

321

about 8 years ago

Not like the POG, but good.

It sounds more natural and less obtrusive than the POG. It's a good compact alternative and the modullation is nice too.

lex_hill

298

over 9 years ago

Specific use

Honestly a lot of the tones are probably not that usable, But set to the right setting it has a fantastic sound for soloing, really adds a cool flavour