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Boss RT-20 - page 1
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 tha ...
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Boss RT-20 - page 2
2 Contents Main Features .................................................. 1 Installing Batteries ........................................... 3 Making the Connections ................................... 4 Mono Connection ............................................................................ 5 Stereo Connection ............................... ...
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Boss RT-20 - page 3
3 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, ...
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Boss RT-20 - page 4
4 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 receivi ...
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Boss RT-20 - page 5
5 Making the Connections Mono Connection ■ Guitar fig.020 ■ Keyboard fig.030 Electric Guitar Guitar Amp AC Adaptor PSA series (sold separately) Set DRIVE TYPE switch to GUITAR Keyboard MTR Mixer Set DRIVE TYPE switch to KEYBOARD AC Adaptor PSA series (sold separately) ...
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Boss RT-20 - page 6
6 Making the Connections Stereo Connection ■ Guitar fig.060 ■ Keyboard fig.070 Effector Electric Guitar Guitar Amp AC Adaptor PSA series (sold separately) Set DRIVE TYPE switch to GUITAR Keyboard MTR Mixer AC Adaptor PSA series (sold separately) Set DRIVE TYPE switch to KEYBOARD ...
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Boss RT-20 - page 7
7 Operating the RT-20 Pedal Operation When “ON” When “OFF” Lit Off EFFECT ON/OFF Pedal Alternately switches the effect on or off each time the pedal is pressed. When switched off, the sound input to the INPUT jack is output without change. When set to “SLOW” When set to “FAST” Off Lit SLOW/FAST Pedal Switches the rotor’s rotation ...
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Boss RT-20 - page 8
8 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 1. Set the DRIVE TYPE swit ...
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Boss RT-20 - page 9
9 Operating the RT-20 Adjusting the Balance of the HORN Rotor and BASS rotor volume You can adjust the balance in volume from the horn rotor and bass rotor inside the rotary speaker with the BALANCE knob. fig.081 Adjusting the Rotor’s Rotation Speed You can adjust the rotor rotation speed using the SLOW SPEED and FAST SPEED knobs. Turning these k ...
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Boss RT-20 - page 10
10 Operating the RT-20 Operating the BRAKE You can use the brake to stop the rotation of the rotor. Pressing both of the pedals simultaneously stops the rotation of the rotor. The SLOW/FAST indicator flashes rapidly while the brake is on. The time required for the rotor to come to a stop after the BRAKE is activated changes according to the positio ...
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Boss RT-20 - page 11
11 Front Panel Names of Things and What They Do 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 Use this to select the rotary speaker effect from the four available types. “Mode List” ...
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Boss RT-20 - page 12
12 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. EFFECT ON/OFF Indicator This lights up when the effect is on. SLOW/FAST Indicator Extinguished when SLOW is selected; ...
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Boss RT-20 - page 13
13 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 affilia ...
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Boss RT-20 - page 14
14 Names of Things and What They Do Rear Panel INPUT Jacks (INPUT A (MONO), INPUT B) These input jacks are used for connecting electric guitars, keyboards, other instruments, and effects processors. Connect mono instruments or effects to the A (MONO) jack. “Making the Connections” (p. 4) * The A (MONO) jack also doubles as the power switch when ...
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Boss RT-20 - page 15
15 Troubleshooting The power doesn’t come on. ❍ Is the guitar or keyboard connected correctly to the INPUT A (MONO) jack? → Check the connections again (p. 4–p. 6). * When running off batteries, the unit won’t switch on unless there’s something plugged into the INPUT jack. This helps conserve the batteries. ❍ Is the plug connected to ...
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Boss RT-20 - page 16
16 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 ...
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Boss RT-20 - page 17
17 Setting Memo ...
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Boss RT-20 - page 18
18 Main Specifications RT-20: Rotary Sound Processor Nominal Input Level -20 dBu Input Impedance 1 M Ω Output Impedance 1 k Ω Recommended Load Impedance 10 k Ω or greater Display VIRTUAL ROTOR Controls EFFECT ON/OFF pedal SLOW/FAST pedal OVERDRIVE knob BALANCE knob RISE TIME knob MODE knob FAST SPEED knob SLOW SPEED knob DIRECT LEVEL knob EFF ...
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Boss RT-20 - page 19
19 * This device features light emitting diodes (LEDs), which with certain settings may repeatedly flash on and off at a rapid rate. Some persons may experience headaches or nausea by staring at such flashing lights. Cease looking at the LEDs immediately if this occurs. This product complies with the requirements of European Directive 89/336/EEC. F ...
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Boss RT-20 - page 20
G6017153R1 ...
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