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User guide cover for the Spring Reverb II guitar effects pedal by Colortone, featuring a black background with a white and gray illustration of the pedal with control knobs labeled Decay, Blend, Tone, and Mod, and a central switch labeled E S T, with surrounding artistic lines.
  • As of October 2025 we have started to label the firmware version on the inside of the Box.

    For the first initial run of VibroVerb and ZeroSum without the firmware physically labelled inside you can assume it is v1.10a.

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