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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 sh
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Contents Main Features .................................................. 1 Installing Batteries ........................................... 3 Making the Connections ................................... 4 Mono Connection ............................................................................ 5 Stereo Connection........................................................................... 6 Operating the RT-20......................................... 7 Pedal Operation ..............
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Installing Batteries Batteries are supplied with the unit. The life of these batteries may be limited, however, since their primary purpose was to enable testing. Insert the included batteries as shown in figure, being careful to orient the batteries correctly. fig.010 • When turning the unit upside-down, get a bunch of newspapers or magazines, and place them under the four corners or at both ends to prevent damage to the buttons and controls. Also, you should try to orient the unit so
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Making the Connections • The use of an AC adaptor is recommended as the unit’s power consumption is relatively high. Should you prefer to use batteries, please use the alkaline type. • Noise may be produced if wireless communications devices, such as cell phones, are operated in the vicinity of this unit. Such noise could occur when receiving or initiating a call, or while conversing. Should you experience such problems, you should relocate such wireless devices so they are at a grea
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Making the Connections Mono Connection ■ Guitar fig.020 Set DRIVE TYPE switch to GUITAR AC Adaptor PSA series (sold separately) Electric Guitar Guitar Amp ■ Keyboard fig.030 Set DRIVE TYPE switch to KEYBOARD AC Adaptor PSA series (sold separately) MTR Mixer Keyboard 5
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Making the Connections Stereo Connection ■ Guitar fig.060 Set DRIVE TYPE switch to GUITAR AC Adaptor PSA series (sold separately) Effector Guitar Amp Electric Guitar ■ Keyboard fig.070 Set DRIVE TYPE switch to KEYBOARD AC Adaptor PSA series (sold separately) MTR Mixer Keyboard 6
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Operating the RT-20 Pedal Operation When “ON” When “OFF” When set to “SLOW” When set to “FAST” Off Off Lit Lit SLOW/FAST Pedal EFFECT ON/OFF Pedal Switches the rotor’s rotation speed each Alternately switches the effect on or off time the pedal is pressed. each time the pedal is pressed. When switched off, the sound input to the INPUT jack is output without change. 7
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Operating the RT-20 Panel Operation For this description of using the pedals, first press the EFFECT ON/OFF pedal to switch on the effect (ON/OFF indicator lit), and press the SLOW/FAST pedal to switch the setting to SLOW (SLOW/FAST indicator off). In addition, set the knobs to the positions shown in the figure. fig.080 2 3 4 1. Set the DRIVE TYPE switch on the rear panel to match the type of instrument being used. Refer to “Making the Connections” (p. 5–p. 6). 2. Use the MOD
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Operating the RT-20 Adjusting the Balance of the HORN Adjusting the Rate at Which the Speed Rotor and BASS rotor volume Changes When Switching from SLOW You can adjust the balance in volume from to FAST and FAST to SLOW the horn rotor and bass rotor inside the You can adjust the rate at which the rotation rotary speaker with the BALANCE knob. changes from slow to fast and vice versa with fig.081 the RISE TIME knob. Turn the knob to the left to slow down the rate of chang
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Operating the RT-20 Operating the BRAKE Controlling the RT-20 with an Expression Pedal You can use the brake to stop the rotation of the rotor. You can connect an optional expression pedal (such as the Roland EV-5) to the rear Pressing both of the pedals simultaneously stops the rotation of the rotor. panel SPEED (EXP PEDAL) jack and use the pedal to control the rotor’s rotation speed in The SLOW/FAST indicator flashes rapidly real time. while the brake is on. fig.100 The tim
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Names of Things and What They Do Front Panel RISE TIME Knob This adjusts the rate at which the rotation changes from slow to fast and vice versa. When this knob is at the center position, the rotary speaker rotation changes at the standard rate. MODE Knob BALANCE Knob Use this to select the rotary This adjusts the balance in volume from speaker effect from the four the horn rotor and bass rotor inside the available types. rotary speaker with the BALANCE knob. “Mode List” (p. 13) * When MO
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Names of Things and What They Do VIRTUAL ROTOR Display This display uses indicators and moving light beams to indicate the rotary speaker effect visually. The HORN rotor is indicated with the red light, the BASS rotor with blue. SLOW/FAST Indicator Extinguished when SLOW is selected; EFFECT ON/OFF Indicator lights when FAST is selected. This lights up when the effect is on. POWER Indicator This lights up when the power is on. EFFECT ON/OFF Pedal SLOW/FAST Pedal This alternately switches the ef
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Names of Things and What They Do Mode List The rotary speaker sound is modeled on the famed vintage Leslie 122 speaker. The MODE knob is used to switch between the rotary and overdrive tones. * The trademarks listed in this document are trademarks of their respective owners, which are separate companies from BOSS. Those companies are not affiliated with BOSS and have not licensed or authorized BOSS’s RT-20. Their marks are used solely to identify the equipment whose sound is simulated by BOSS
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Names of Things and What They Do Rear Panel INPUT Jacks Headphone Jack (PHONES) (INPUT A (MONO), INPUT B) You can listen through headphones by These input jacks are used for connecting the headphones here. connecting electric guitars, keyboards, * Plug in the headphones only after turning other instruments, and effects on the power. When turning the power processors. off, unplug the headphones first, and then Connect mono instruments or effects to turn off the power. the A (MONO) jack.
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Troubleshooting The power doesn’t come on. Sound is distorted. ❍ Is the guitar or keyboard connected correctly ❍ Are the EFFECT LEVEL knob and DIRECT to the INPUT A (MONO) jack? LEVEL knob positioned correctly? → Check the connections again (p. 4–p. 6). → Sounds may become distorted with the knob at certain settings. Turn down the EFFECT LEVEL * When running off batteries, the unit won’t switch knob and DIRECT LEVEL knob to appropriate on unless there’s something plugged into the level. If
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Sample Settings * Set the DRIVE TYPE switch on the rear panel to match the type of instrument being used. ■ STANDARD SOUND ■ TREMOLO CHORUS ■ WILD SPIN ■ UNI-V 16
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Setting Memo 17
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Main Specifications RT-20: Rotary Sound Processor Power Supply DC 9 V: Dry battery (R6/LR6 (AA) type) x 6, Nominal Input Level AC Adaptor -20 dBu Current Draw Input Impedance 85 mA (9 V max.) 1 MΩ * Expected battery life under continuous use: Output Impedance Carbon: 6 hours 1 kΩ Alkaline: 10 hours These figures will vary depending on the Recommended Load Impedance actual conditions of use. 10 kΩ or greater Dimensions Display 173 (W) x 158 (D) x 57 (H) mm VIRTUAL ROTOR 6-13/16 (W) x 6-1/4 (D)
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For EU Countries This product complies with the requirements of European Directive 89/336/EEC. For the USA FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
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G6017153R1
