PedalBro

Octave · Boss

Boss MO-2 Multi Overtone

The MO-2 Multi Overtone is an octave pedal that layers harmonic content above your original signal, allowing you to emphasize different frequency ranges. Premier Guitar's reviewer gave it 4 out of 5 stars, describing it as a pitch-shifting tool capable of adding harmonized character across the high, low, and midrange octaves.

  • 9V DC · center −
  • 40 mA
New
from $124.50
Used (asking)
from $109.18

The rundown

Highlights

  • Generates multiple octaves with harmonic richness above the dry signal
  • Three voicing modes to accentuate different frequency ranges
  • Buffered bypass with 9V DC power and battery compatibility
  • Compact footprint at 73 x 130.2 mm
  • Made in Japan and currently in production

Best for

Players wanting to add harmonic depth and shimmer to their tone through a dedicated multi-octave generator.

Professional reviews

What the press rated it. We link to each review; read the full piece for the details.

Quick facts

Power
9V DC
Current draw
40 mA
Polarity
Center negative
Dimensions
73 × 130.2 mm
Status
In production

Where to buy Boss MO-2 Multi Overtone

$124.50 lowest new price · Reverb

Used listings asking $109.18–$118, median $118 (3 listings, small sample). Asking prices, not sold prices.

Current offers
SellerConditionPriceLink
ReverbUsed$109.18View
ReverbUsed$118View
ReverbUsed$118View
ReverbNew$124.50View
ReverbNew$137.23View
ReverbNew$147.44View
ReverbNew$149.99View
ReverbNew$164.99View
ReverbNew$164.99View
ReverbNew$164.99View

Prices last checked 20 hours ago. Links to sellers are affiliate links.

Frequently asked questions

What power supply does the MO-2 need?

The MO-2 Multi Overtone runs on 9V DC with center-negative polarity at 40 mA and is also compatible with battery power.

What size is the MO-2?

The MO-2 Multi Overtone measures 73 x 130.2 mm.

Does the MO-2 have true bypass?

The MO-2 Multi Overtone uses buffered bypass rather than true bypass.

Similar pedals

Same type, similar features.

Specs from pedalfilter. Summary written by PedalBro from those specs and public descriptions.

Page last updated September 29, 2026.