Boss Rotary Ensemble RT-20

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Thank you, and congratulations on your choice of BOSS RT-20 Rotary Sound Processor.

Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY”

and “IMPORTANT NOTES” (separate sheet).

These sections provide important information concerning the proper operation of the unit.

Additionally, in order to feel assured that you have gained a good grasp of every feature

provided by your new unit, this manual should be read in its entirety. The manual should

be saved and kept on hand as a convenient reference.

Main Features

●

COSM Modeling faithfully creates the speaker characteristics, internal cabinet resonance,

rotation speed adjustments, and other particular elements of the rotary speaker to provide

realistic reproduction of the rotary speaker sound.

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Includes overdrive, a must for rock sounds.

●

Features four internal sounds, from the conventional rotary sound to rock sounds and UNI-

V, a sound known and loved by many guitarists.

●

Expression pedal can be used to freely control the rotation speed.

●

Permits adjustment of the balance for the horn speaker and bass speaker volume levels,

something difficult to accomplish with the original speakers. Use the knob to make changes

in the tone, from sharp to mild, in real time.

●

Features Virtual Rotor Display that displays the speaker rotation effectively as a visual

image.

COSM (Composite Object Sound Modeling)

Composite Object Sound Modeling (COSM) is BOSS/Roland’s

innovative and powerful sound modeling technology.

COSM analyzes the many factors that make up the original sound,

such as the electrical and physical characteristics of the original, and

then produces a digital model that can reproduce the same sound.

any form without the written permission of BOSS CORPORATION.

Need help?

Do you have a question about the Boss Rotary Ensemble RT-20 and is the answer not in the manual?

Summary

Installing Batteries

Battery Installation and Management

Guides on battery insertion, orientation, type, life, and care notes.

Making the Connections

Connection Best Practices

Operating the RT-20

Pedal Functions and Indicators

Explains the EFFECT ON/OFF and SLOW/FAST pedals, and their corresponding indicator lights.

Front Panel Operation

Details using the DRIVE TYPE switch, MODE knob, and effect level knob for basic sound creation.

Advanced Parameter Adjustments

Rotor Control and Expression Pedal Use

Explains the BRAKE function and how to use an expression pedal for real-time speed control.

Front Panel Controls Explained

Front Panel Indicators and Pedals Explained

Rotary Speaker Mode Descriptions

Details the four available sound modes (I-IV) and their sonic characteristics.

Rear Panel Connectivity and Switches

Troubleshooting Common Issues

Power and Sound Issues

Provides solutions for power, sound, and distortion problems, with references to relevant pages.

Main Specifications and Accessories

Technical Specifications