Electro-Harmonix Slap-Back Echo review – a delay, boost and tonal thickener in one

Electro-Harmonix resurrects a rare pedal from 1978 and puts it into a modern, ’board-friendly format for what could be the stompbox sleeper hit of the year – and not just for rockabilly

Electro-Harmonix Slap-Back Echo
(Image: © Future / Olly Curtis)

Guitar World Verdict

With plenty of flexibility from the various combinations of boost and echo, the Slap-Back Echo is a practical boost and fattener, but it’s also a no-brainer if you want instant vintage rock ’n’ roll slap without messing with delay times, and is something you can stick on your pedalboard to free up your standard delay pedal from slapback duties.


  • +

    Very compact.

  • +

    Substantial boost available.

  • +

    Instant slapback sound.

  • +

    Sound thickening qualities.


  • -

    A knob for variable delay time (rather than toggle-switched) would have been more flexible.

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Previously we reviewed the Electro-Harmonix Lizard Queen, a reimagining of a pedal the company had never actually made in its 1970s prime. 

Here, however, we have a revamped version of a pedal that the company did make back in 1978, but in such small quantities that it has become an expensive collector’s item.

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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.