Does the octave go up and down?

Octave adds one octave lower and mixes them

Does the Boss ME-20B bass guitar effects pedal come with the power adapter or is that a seperate purchase?

It comes with it's own adapter and also runs on double A batteries if you don't want to use the adapter

Does it have a wah peddle

Hi, Yes it has a Wah function. If there is anything else I can do for you, please feel free to contact me at 716-675-7815 or toll free 1-800-863-4347. I am in the office Monday-Friday 10am-6pm(eastern time). Thank you! ~Matt

Does me-20b come with a boss brand psa 120s power adapter, a cheaper brand, or none at all? is same from all sellers? please be specific. thanks.

Hi, Boss does not include a power supply with this pedal. The Boss PSA-120 power supply is sold separately.

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Boss ME-20B Bass Multiple Effects Pedal Board

Product ID: 49165510

Details

Brand
BOSS
Colour
silver
Item weight
2.04 kg
Style
Multi-effects
Voltage
9 Volts

🎸unique bass-focused effects

🦾super-tough metal chassis

🎛️5 realtime control knobs

€ 363.71

Duties & taxes included

In stock

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Description

🎸 Own the stage with the ME-20B — where pro bass tone meets rock-solid control.

RUGGED RELIABLE - Built with a super-tough metal chassis designed to withstand the rigors of live gigs.
INSTANT STAGE READY TONE - BOSS-quality effects tailored for bassists who demand pro sound on the fly.
NEXT LEVEL BASS PRESENCE - BASS ENHANCE function delivers an instant, powerful presence boost that cuts through any mix.
VERSATILE EFFECTS ARSENAL - From Synth and Octave to Defretter and T-Wah, explore a wide palette of bass-centric effects.
EFFORTLESS SOUND SCULPTING - 5 realtime control knobs plus an expression pedal for dynamic, hands-on creativity.

The Boss ME-20B is a performance-driven bass multi-effects pedal featuring a durable metal chassis, 3 footswitches, 5 realtime control knobs, and an expression pedal. It offers a broad range of bass-optimized effects including synth, octave, defretter, and a unique BASS ENHANCE function for instant presence boost. Designed for live performers seeking easy-to-use, high-quality sound shaping in a compact, rugged unit.

Specifications

ASIN	B000V7T03A
Amperage	20 Milliamps
Audio Output Effects	Distortion, Delay, Reverb, Chorus, Compression, Synth, Overdrive, Flanger, Phaser, T-Wah, Defretter
Brand Name	BOSS
Colour	silver
Controls Type	Knob
Customer Reviews	3.7 3.7 out of 5 stars (14)
Global Trade Identification Number	00761294403198
Hardware Interface	1/4-inch Audio
Item Dimensions	36.1 x 25.4 x 10.9 centimetres
Item Weight	2.04 kg
Manufacturer	Boss
Manufacturer Part Number	ME-20B
Model Number	ME-20B
Power Source	Battery Powered
Signal Format	Analog
Style	Multi-effects,Delay,Reverb,Chorus,Bass,Compressor,Distortion,Overdrive,Expression
UPC	761294403198
Voltage	9 Volts

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