Nembrini Audio has just dropped the Hughes & Kettner Tube Rotosphere plugin, a faithful digital recreation of the legendary Hughes & Kettner Tube Rotosphere MKII hardware pedal.
The lineage of this new Hughes & Kettner Tube Rotosphere plugin runs deep. Leslie Speaker Systems, originally designed for Hammond organs in the 1930s, found new life in the 1960s when guitar legends like The Beatles, Eric Clapton and David Gilmour discovered its distinctive swirl. Fast-forward to the 1990s, and Hughes & Kettner set out to capture the iconic Leslie sound in pedal form. Their Tube Rotosphere became an analogue benchmark—an exceptionally accurate reproduction of the rotary speaker experience that keyboardists and guitarists could actually take on the road.
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Now, more than thirty years later, Nembrini has transformed this renowned piece of hardware into a plugin that captures every detail of the original. The software delivers that signature tube-driven warmth and hypnotic rotary modulation that made the hardware a go-to for both keyboardists and guitarists chasing authentic cabinet movement.
What sets this plugin apart is Nembrini’s meticulous approach to modelling. Their advanced technology reproduces the lush swirl, tube saturation and genuine rotary motion of the original pedal. Features include authentic emulation of the analogue circuitry and tube preamp behaviour, independent rotor speed simulation with separate low and high frequency controls, and a breaker switch that mimics realistic ramp-up and ramp-down effects.
Tube saturation modelling comes with visual feedback, while rotor balance control lets you fine-tune the blend to taste. The stereo signal path creates wide, immersive rotary modulation that sits beautifully in any mix.
This recreation brings vintage sound to the digital sphere, with an authenticity worth hearing for yourself.
Fancy giving it a spin? Head here to learn more and download.
