JAM Pedals RetroVibe Univibe Pedal mk. 4

The RetroVibe Mk.4 brings the unmistakable swirl of a classic Uni‑Vibe into a modern, stage‑ready format. JAM Pedals rebuilt their flagship modulation pedal from the ground up, keeping the warm, three‑dimensional movement players love while expanding the range, control, and feel. The result is a lush, expressive vibe that sits beautifully in a mix and responds naturally to your playing.

This version adds tap tempo, ramping, and expression control, giving you the ability to shape speed and intensity in real time. Slow, syrupy pulses, fast rotary‑style spins, and everything in between feel smooth and musical. Chorus and Vibrato modes let you move from deep, vocal modulation to more experimental textures with ease.

Hand‑built in Greece with JAM’s signature attention to detail, the RetroVibe Mk.4 is a rich, organic modulation tool that feels alive under your hands and fits seamlessly into both vintage‑leaning and modern rigs.

Specs

• All‑analog Uni‑Vibe circuit

• Chorus & Vibrato modes

• Tap tempo footswitch

• Ramping function for Leslie‑style acceleration

• Expression pedal input (speed control)

• True bypass

• Standard 9V DC power

• Hand‑built in Greece

Controls

Speed: Sets the modulation rate. Ranges from slow, syrupy pulses to fast, rotary‑style spins.

Depth: Adjusts the intensity of the effect, from subtle movement to deep, vocal swirl.

Mode Switch (Chorus / Vibrato): Chorus delivers the classic Uni‑Vibe throb; Vibrato shifts into pitch‑warped, more experimental textures.

Tap Tempo Footswitch: Lets you set the modulation speed on the fly. Ideal for live timing and dynamic shifts.

Ramping (Hold Tap): Holding the tap switch ramps the speed up or down to a user‑defined target rate, mimicking the acceleration of a Leslie speaker.

Bypass Footswitch: Engages or disengages the effect with true bypass switching.

Expression Input: Accepts a standard passive 10k expression pedal for real‑time speed control.