Eventide H90 Harmonizer review

A step up from the H9, Eventide’s latest Harmonizer multi-effects unit lets you use two algorithms at the same time – with spectacular results

Eventide Audio H90 Harmonizer
(Image: © Future / Olly Curtis)

Guitar World Verdict

It’s highly likely you won’t find a classier set of effects to expand your ’board’s options in a single pedal. The H90 is an extremely powerful multi-effects unit that covers all the “bread-and-butter” stuff, as Eventide states, with ease and excels at esoteric concoctions.


  • +

    Wide range of quality effects.

  • +

    Extensive routing options and connectivity.

  • +

    Flexible footswitching.

  • +

    Software editing.


  • -

    Expensive and there’s a lot to get your head around.

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.

Of all the Eventide pedals, the one most likely to be found on pro ’boards is the H9, a twin-footswitch pedal offering the brand’s ‘greatest hits’ of effects, with classy studio-quality reverb, delay, modulation and pitch-shifting. 

While it’s a potent asset for any pedalboard, the H9 only offers one effect at a time. Enter the H90: a triple-footswitch pedal that allows you to use two algorithms at the same time in either series or parallel.

Thank you for reading 5 articles this month**

Join now for unlimited access

US pricing $3.99 per month or $39.00 per year

UK pricing £2.99 per month or £29.00 per year 

Europe pricing €3.49 per month or €34.00 per year

*Read 5 free articles per month without a subscription

Join now for unlimited access

Prices from £2.99/$3.99/€3.49

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.