JAM Pedals RetroVibe mk.4: The Definitive Vibe Experience Product Description The JAM Pedals RetroVibe mk.4 is widely considered the gold standard for players seeking the authentic, three-dimensional "swirl" of the legendary 1960s Uni-Vibe. Far from a digital approximation, the RetroVibe is a true analog circuit utilizing the exact same type of photo-resistors and incandescent bulb system that created the hypnotic, liquid modulation heard on iconic psychedelic and rock records. The mk.4 version refines this classic design with modern reliability, a lower noise floor, and an expression pedal input for hands-free control of the speed, making it the most musical, authentic, and gig-ready vibe available today. Key Features True Analog Circuitry: Built with a genuine incandescent bulb and light-dependent resistors, ensuring the smooth, warm, and unpredictable modulation that modern chips simply cannot replicate. Vintage Voicing: Delivers that lush, thick, and "chewy" chorus/vibrato sound that instantly transports your tone back to 1969. Modern Upgrades: The mk.4 features a quieter signal path, internal protection against voltage spikes, and a dedicated expression pedal jack to control speed in real-time. True Pitch-Shifting Vibrato: Easily toggle between "Chorus" mode (the classic Uni-Vibe sound) and "Vibrato" mode (true pitch-modulated shimmer) via the dedicated switch. Artisanal Craftsmanship: Hand-wired and hand-painted in Greece, each unit is a work of art that feels as vintage as it sounds.
