JAM Pedals RetroVibe MK4 Uni-Vibe Effects Pedal

The RetroVibe has long stood among the most revered Uni-Vibe interpretations ever made, celebrated for its lush pulse, vocal shimmer, and unmistakable warmth.The mk.4 continues that legacy. Its all-analog design preserves the soul of the original while expanding its expressive range. A wider Depth and Speed span, plus new Tap Tempo and Ramping functions, invite deeper interaction and performance freedom.Switch between Chorus and Vibrato modes to explore everything from slow, liquid waves to fast, rotary-like spins — always alive, always unmistakably RetroVibe.Plug in a standard passive 10k expression pedal for real-time control of modulation Speed, and shape the sound as it moves.A prolonged press of the TAP footswitch engages ramping from the current speed to a fixed, user-selectable speed.To set the fixed speed:While keeping the TAP footswitch pressed, adjust the Speed knob to taste.After releasing the TAP footswitch, return the Speed to its original position.To set the ramping time (how long it takes to travel between speeds):While keeping the TAP footswitch pressed, adjust the Depth knob to taste.After releasing the TAP footswitch, return the Depth to its original position.CONTROLSDEPTH – Sets how deep the modulation sweeps.SPEED – Sets the rate of modulation.Toggle switch – Selects Chorus (C) or Vibrato (V) mode.Internal trimmer – Adjusts the maximum output level of the effect.TAP – Allows you to tap in the modulation speed or access the ramping feature.EXPRESSION PEDAL INPUTSTS jack → External Tap Tempo footswitch.TRS jack → Speed expression pedal - (standard passive 10k).

• Authentic Analog Soul: Experience the legendary Uni-Vibe sound with an all-analog design that delivers the lush pulse, vocal shimmer, and unmistakable warmth revered by guitarists worldwide.
• Chorus & Vibrato Modes: Effortlessly toggle between classic Chorus for liquid, watery waves and Vibrato for fast, rotary-style spins, providing a versatile range of modulation for any genre.
• Precision Tap Tempo: Lock into the perfect groove with the dedicated Tap Tempo footswitch, allowing you to sync your modulation speed instantly to the rhythm of your performance.
• Dynamic Ramping Feature: Create expressive transitions with a prolonged press of the TAP switch; customize both your target speed and the ramping time for unique, hands-free sonic swells.
• Real-Time Expression Control: Take total command of your sound by connecting a standard 10k expression pedal to adjust modulation Speed on the fly, mimicking the feel of a vintage rotary speaker.
• Expanded Sonic Range: The mk.4 features a wider Depth and Speed span than its predecessors, plus an internal trimmer to fine-tune the maximum output level for a perfect fit on any pedalboard.