JAM Pedals RetroVibe Mk4 Univibe Mustang Solid spruce and mahogany delivers

Solid spruce and mahogany delivers a great combination of a bright and clear sound matched with a warm and mature tone

with the original Silvertone output and rectifier valves present and correct

9375 inches

With Iridium

Internal trimmer Adjusts maximum output level

JAM Pedals RetroVibe Mk4 Univibe Mustang Solid spruce and mahogany deliversThe JAM Pedals RetroVibe Mk4 continues one of the most respected Uni Vibe style designs ever produced, preserving the lush pulse, vocal shimmer, and warmth that defined earlier versions while expanding its performance focused feature set. Fully analogue at its core, the Mk4 stays true to the character of the original Uni Vibe circuits, delivering deep, swirling modulation that feels alive and responsive under the fingers. Built with premium analogue