JAM Pedals Retrovibe mk.4 Vibrato/Chorus Guitar Pedal

The Vibe effect is essentially a heavily tweaked phase shifter, meant to produce lush chorus and vibrato sounds a la the Leslie Rotary Speaker. That was the goal for UniVox at least, who released the Uni-Vibe in 1968 to offer musicians an affordable alternative to an expensive and bulky rotary speaker cabinet. The phase effect is a similar form of modulation, created by splitting your signal into two paths and mixing an altered signal with evenly spaced notches in the frequency spectrum. The distinct peaks and valleys in the signal occur when certain frequencies in both signal paths cancel each other out, making the whooshing sound we know and love. The difference between that and the Vibe is that the frequency filters are staggered rather than layered, creating a deeper and more hypnotic effect. While the mk.3 pedal had the exact same layout as the Uni-Vibe, the new mk.4 adds the tempo/ramping button, while retaining the expression pedal input for modulation speed, and in the internal intensity trimmer.

As with every JAM pedal, the Retro Vibe nails the spirit of the original while improving flexibility, noise and reliability. It's not inexpensive, but for the true effect connoisseur the JAM Retro Vibe is without peer.