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Owner’s Manual
Thank you, and congratulations on your choice of the BOSS ME-50 Guitar Multiple Effects.
Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY” (page 2–3) and
“IMPORTANT NOTES” (page 4).
These sections provide important information concerning the proper operation of the unit. Additionally, in order to
feel assured that you have gained a goodgrasp of every feature provided by your new unit, owner’s manual should
be read in its entirety. The manual should be saved and kept on hand as a convenient reference.

Main features
Simple Operation—Works Like a
Compact Effects Processor
Each effect is controlled with a dedicated knob.
Intuitive operation, similar to that of compact effects
processors, lets you make changes to tones directly.Multi-Function Expression Pedal
The ME-50 is equipped with an expression pedal that
gives you control over six different specialized pedal
effects. It can also be switched for use as a volume
pedal.

Powerful COSM Drive Sound

Memory Function

Roland’s original “COSM” modeling technology lets
you perform with a wide variety of powerful distortion
effects, from classic vintagesounds, to original
distortion sounds.

You can store up to 30 original tones you have created.
You can also use the pedals in “Memory mode” to call
up stored tones instantly.

COSM (Composite Object Sound Modeling)
Composite Object Sound Modeling (COSM) is Roland’s
innovative and powerful sound modeling technology.
COSM analyzes the many factors that make up the
original sound, such as theelectrical and physical
characteristics of the original, and then produces a
digital model that can reproduce the same sound.

Copyright © 2002 BOSS CORPORATION
All rights reserved. No part of this publication
may be reproduced in any form without the
written permission of BOSS CORPORATION.

AUX IN Jack
The AUX IN jack makes it easy to practice along with
CDs, MDs, and other input.Battery-Powered Operation
The ME-50 can be powered in two ways, with (6) AA
batteries or by using the AC adaptor (optional).

USING THE UNIT SAFELY

The
symbol alerts the user to important instructions
or warnings.The specific meaning of the symbol is
determined by the design contained within the
triangle. In the case of the symbol at left, it is used for
general cautions, warnings, oralerts to danger.

Used for instructions intended to alert
the user to the risk of death or severe
injury should the unit be used
improperly.
Used for instructions intended to alert
the user to the risk of injury or material
damage should the unit be used
improperly.
* Material damage refers
other adverse effects
respect to the home
furnishings, as well
animals or pets.

Thesymbol alerts the user to items that must never
be carried out (are forbidden). The specific thing that
must not be done is indicated by the design contained
within the circle. In the case of the symbol at left, it
means that the unit must never be disassembled.

to damage or
caused with
and all its
to domestic

The ● symbol alerts the user to things that must be
carried out. The specificthing that must be done is
indicated by the design contained within the circle. In
the case of the symbol at left, it means that the powercord plug must be unplugged from the outlet.

001

009

• Before using this unit, make sure to read the
instructions below, and the Owner’s Manual.

• Do not excessively twist or bend the power cord,
nor place heavy objects on it. Doing so can
damagethe cord, producing severed elements and
short circuits. Damaged cords are fire and shock
hazards!
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002c

• Do not open (or modify in any way) the unit or its
AC adaptor....