Description
The Rotovibe JD-4S puts a rotating speaker cabinet under your foot. Rather than turning a knob to chase a modulation speed, you rock the treadle live, sweeping from a slow, breathing pulse into a fast, swirling blur — the same kind of throbbing, three-dimensional movement that colored so many late-60s/early-70s recordings. Switch between vibrato mode for pure pitch-wobble warble and chorus mode for a thicker, shimmering doubling effect, and dial in depth with the onboard knob to control how dramatic the swirl feels.
Place it after your gain stages, where its rotating-cabinet character reads most clearly, or push it further down the chain for a wetter, more ambient wash. The dual LED speed indicators give you a visual read on where the modulation sits, useful when you’re riding the treadle mid-song and need a quick glance to confirm your rate. Dunlop rebuilt the internal switching for this version, so on/off transitions are quiet and the hardware is built to hold up to repeated stomping across long tours.
Key features:
- Vibrato and chorus modes
- Foot pedal control of modulation speed
- Knob control of modulation depth
- LED modulation speed indicators
- Effect on/off switch
- Standard 1/4″ input/output
- Runs on the Dunlop ECB-03 AC adapter and/or a 9V battery
A staple for pedalboard builders chasing that rotating-speaker swirl without hauling an actual cabinet.
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