Boss RT-20 Rotary Sound Processor.
- Authentic rotary speaker sounds via COSM technology
- Slow/Fast transition time is adjustable from gradual to rapid change; optional Expression pedal can
- 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
Boss RT-20 Rotary Sound Processor