Boss RT-20 Rotary Sound Processor *

Guitar legends from Santana to the Beatles have incorporated the rotary speaker into their music. BOSS kept this in mind when creating the RT-20, and by employing their COSM modeling technology, it reproduces classic rotary sounds just like the originals. Adjustable Rise Time, Horn and Bass speed, Overdrive, and more. Not just for the classic swirl, the RT-20 can create unique overdrive and pulsating effects as well. Amazing sound plus a stunning graphical view of the virtual rotors in its display.
 

Authentic rotary speaker sounds via COSM technology
Slow/Fast transition time is adjustable from gradual to rapid change; optional expression pedal can control speed in real time
Onboard overdrive effects
Adjustable mix balance between Treble Rotor and Bass Rotor
4 types of sounds, from standard rotary speaker effects to rock-oriented tones, UNI-V, and more
Guitar/Keyboard switch
Dazzling virtual-rotor display