BOSS RT-20 Rotary Sound Processor

Legendary Rotary Speaker Simulation with COSM Technology

Inspired by the iconic rotary speaker tones used by legendary artists such as The Beatles, Jeff Beck, Santana, and Stevie Ray Vaughan, the BOSS RT-20 Rotary Sound Processor delivers authentic swirling speaker effects in a powerful stompbox format. Utilizing advanced COSM modeling technology, the RT-20 recreates the dynamic motion and tonal depth of classic rotary speakers while offering modern control over speed, balance, overdrive, and modulation effects.

FEATURES & PERFORMANCE

• Authentic rotary speaker simulation powered by advanced COSM modeling technology
• Adjustable slow/fast transition with customizable Rise Time control
• Independent horn and bass rotor speed control for precise tonal shaping
• Built-in Overdrive for added warmth and rock-oriented tones
• Four sound modes including classic rotary, UNI-V style modulation, and modern variations
• Treble and bass rotor mix balance for enhanced spatial depth
• Dual stereo outputs for immersive rotary speaker movement
• Compatible with optional expression pedals for real-time speed control

VIRTUAL ROTOR DISPLAY

• Unique real-time graphical rotor display showing virtual speaker rotation
• Red center light represents the virtual horn
• Blue outer ring visualizes the rotating bass speaker
• Eye-catching display provides both visual feedback and stage appeal

CONNECTIVITY & CONTROL

• Compatible with guitars and keyboards using the Drive Type switch
• Dual inputs and stereo outputs for flexible signal routing
• Expression pedal support for live performance control
• Headphone output for private practice and sound experimentation

TECHNICAL SPECIFICATIONS

• Nominal Input Level: -20 dBu
• Input Impedance: 1 MΩ
• Output Impedance: 1 kΩ
• Recommended Load Impedance: 10 kΩ or greater
• Display: VIRTUAL ROTOR
• Power Supply: DC 9V (6 x AA batteries) or PSA-series AC adaptor
• Dimensions: 173 mm (W) × 158 mm (D) × 57 mm (H)
• Weight: 1.1 kg (including batteries)

IDEAL FOR

• Guitarists seeking authentic Leslie-style rotary speaker tones
• Keyboard players wanting classic organ-style modulation
• Live performers needing dynamic modulation effects
• Studio musicians exploring unique rotary and pulsating overdrive textures