Nembrini Audio has introduced a new audio plugin which brings classic rotary sounds with rich tube warmth and easy rotor speed control.
Modeled with Nembrini Audio’s advanced modeling technology, the Hughes & Kettner Tube Rotosphere plugin aims to captures the lush swirl, warm tube saturation, and authentic rotary motion of the original hardware.
The Tube Rotosphere plugin is an authentic digital emulation of the acclaimed Hughes & Kettner Tube Rotosphere MK II rotary speaker simulator. Celebrated for its rich tube-driven character and highly musical rotary modulation, the original hardware became a secret weapon for keyboardists and guitarists seeking the iconic swirling depth of a classic rotary cabinet with the warmth of real tube saturation. This plugin version faithfully captures every nuance of its analog counterpart, offering everything from subtle motion to dramatic Doppler-infused motion, now seamlessly integrated into your digital rig.
Hughes & Kettner Tube Rotosphere features
- True-to-life emulation of the Tube Rotosphere MK II analog circuit and tube preamp behavior.
- Independent rotor speed simulation with separate LF and HF controls, allowing precise adjustment in Hz or synchronized to DAW tempo.
- Breaker switch for authentic ramp-up/down control and rotor stop emulation.
- Tube saturation modeling with visual feedback via a Tube Sat indicator.
- Rotor balance control for fine-tuning the blend between tweeter and woofer simulation.
- Stereo signal path for wide, immersive rotary modulation.
Available in VST/VST3, AU and AAX plugin formats for Windows and Mac, Hughes & Kettner Tube Rotosphere is available for the introductory price of $29.99 USD until October 31st, 2025 (regular $99 USD).
More information: Nembrini Audio

