J Rockett Uni-Verb review

J Rockett has upped the game of the classic analog Uni-Vibe and added a spring reverb emulation for that extra vintage flavor

J. Rockett Audio Uni-Verb
(Image: © Future / Olly Curtis)

Guitar World Verdict

As a Uni-Vibe clone this is the real deal, and if you want that particular form of modulation in all of its gloopy glory then you’ll find it here in extended form.


  • +

    Classic Uni-Vibe sound with extended range.

  • +

    Cool spring reverb sound.

  • +

    Versatile footswitching options.

  • +

    Send and return loop.

  • +

    Adjustable output volume.


  • -

    No expression pedal facility.

You can trust Guitar World Our expert reviewers spend hours testing and comparing guitar products so you can choose the best for you. Find out more about how we test.

The Uni-Vibe is a classic modulation pedal spawned in the 1960s with a distinctive sound of its own – so much so that no digital multi-effects processor worth its salt would omit a named emulation of it among its selection of modulation types. 

Technically speaking, the Uni-Vibe is actually a four-stage phaser. However, due to its use of optical circuitry based on light-dependent resistors surrounding a pulsating lightbulb, it created a unique sonic signature that is still very much in demand.

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Trevor Curwen

Trevor Curwen has played guitar for several decades – he's also mimed it on the UK's Top of the Pops. Much of his working life, though, has been spent behind the mixing desk, during which time he has built up a solid collection of the guitars, amps and pedals needed to cover just about any studio session. He writes pedal reviews for Guitarist and has contributed to Total Guitar, MusicRadar and Future Music among others.