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Guitar & Bass Magazine-UK-
Review of the O2 and O2 Pro Bass Pre-amp Pedals October 2016 . . .
"A pair of top-notch preamps made to exacting standards and offering pretty much everything you would expect . . . . . rating 9/10
Dan Veall-Guitarinteractive Magazine Issue 39-
"There was just something really inviting about the tone and clarity of this pedal. . . . I also see this is being particularly useful with those who want to run a simple setup or have great tone going direct to in-ears without going near the backline . . . simple, clear and great sounding."