Bringing together features like a three-way modulation switch, sustain switch for infinitely unfurling sound, and four unique algorithms for a wide breadth of possible sound, the Walrus Audio Fathom places an ocean of whirling, changing reverb at your feet. Hall, Plate, Lo-Fi and Sonar modes allow you to dial in tones from a subtle touch of reverberation to trench-like depths of never-ending decay with an X knob to control unique aspects of each mode like pre-delay, filter width, and high/low octave blend for the experimental Sonar mode. A small-box reverb that offers the versatility of a big-box model.