Line 6 DL4 MkII Delay Modeler review

The groundbreaking delay pedal gets an awe-inspiring revamp for a new generation

Line 6 DL4 MkII
(Image: © Future)

Guitar World Verdict

The Line 6 DL4 MkII goes well beyond its predecessor with expanded looping time, a condensed footprint, outstanding new and former delay models, and new reverbs delivered with pristine fidelity.


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    Outstanding sounds, including top-quality reverb.

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    Redesigned chassis is more compact.

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    Expanded looping capability.

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    Easy to use.


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As far as delay pedals go, there was nothing else quite like the comprehensive DL4 upon its introduction in 2000  – if you haven't done so already, you should check out Chris Gill’s excellent and concise history of Line 6’s groundbreaking DL4 Delay Modeler.

With 15 superb-sounding digital models of the most legendary delays and echoes, its ability to store and access up to three presets on the fly, 24-bit true stereo signal path, built-in tap tempo and onboard 14-second looper, it’s no surprise the “Big Green Monster” emerged as a benchmark in multipurpose delay pedals and became just as ubiquitous on players’ pedalboards as another green “Screamer” stompbox known for its overdriven quality.

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Paul Riario

Paul Riario has been the tech/gear editor and online video presence for Guitar World for over 25 years. Paul is one of the few gear editors who has actually played and owned nearly all the original gear that most guitarists wax poetically about, and has survived this long by knowing every useless musical tidbit of classic rock, new wave, hair metal, grunge, and alternative genres. When Paul is not riding his road bike at any given moment, he remains a working musician, playing in two bands called SuperTrans Am and Radio Nashville.