Looking to add vintage-style modulation to your sound This used Dunlop JD4S Rotovibe Vibrolla pedal is in good condition and fully functional, offering lush chorus and vibrato effects reminiscent of classic rotating speaker tones. Featuring a foot-controlled rocker for real-time speed modulation and a side knob to adjust intensity, this pedal gives expressive control perfect for both lead and rhythm playing. It operates on a standard 9V power supply or battery and includes durable metal construction designed for stage use. A favorite among pros for its warm, analog tone, the JD4S brings iconic modulation textures to your pedalboard at a great value.