MXR Joshua Ambient Echo review – a delay pedal that gives you the Edge, with a range extending from the traditional to the experimental

A new delay pedal from MXR is a rare event, but this fully featured, U2-themed soundscape generator is worth the wait

MXR M309 Joshua Ambient Echo
(Image: © Future / Phil Barker)

Guitar World Verdict

The M309 Joshua Ambient Echo is a feature-packed pedal that belies its compact size. Use it as a traditional delay or as a soundscape generator. It excels as both.


  • +

    Compact size.

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    Great range of straight and esoteric delay sounds.

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    Practical feature set.

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    Tap tempo.

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    Expression pedal capability.

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    Optional stereo output.


  • -

    While welcome, a range of 12 secondary functions accessed via pressing and holding buttons can be a bit fiddly.

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Tuned by Jeorge Tripps to deliver the sort of iconic soundscapes created by vintage rack-style processing, so says MXR, the Joshua Ambient Echo features rhythmic delays with an optional second echo, modulation, octave voicing on the repeats and tap tempo.

Its name, of course, is a not-so-subtle nod to U2 classic The Joshua Tree, so Edge-esque ambience is very much on the cards.

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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.