Pre-Owned Walrus Audio Fathom Multi Function Reverb

The Pre-Owned Walrus Audio Fathom – Versatile Ambient Reverb in a Compact Footprint

Studio-quality ambient reverb tones

The Walrus Audio Fathom is a multi-function reverb pedal designed for players who want to explore ambient textures without sacrificing clarity or control. This pre-owned unit delivers four unique reverb algorithms—Hall, Plate, Lo-fi, and Sonar—each offering distinct tonal landscapes, from classic spatial depth to experimental modulation.

Intuitive controls for creative exploration

With controls for Decay, Dampen, Mix, and X (which varies by algorithm), the Fathom makes it easy to dial in everything from subtle room reflections to cavernous shimmer. The Sustain footswitch momentarily maxes out the decay, perfect for swells and atmospheric transitions. Whether you're playing ambient soundscapes or just want to add some dimension to your leads, this pedal offers impressive tonal range.

Sonar mode for shimmer and sub-octave textures

One of the standout features of the Fathom is its Sonar algorithm, which blends upper and lower octave reverbs for a lush, almost synth-like wash. Using the X knob, you can blend between shimmer and sub-octave emphasis—ideal for ambient passages and layered compositions. The result is a reverb that feels musical and inspiring, not just effect-driven.

Tap-friendly modulation with three selectable rates

Each mode includes optional modulation with three selectable intensities: Light, Medium, or Heavy. These settings are accessible via a three-way toggle, giving players the ability to tailor the character of the reverb tails. Whether you're after a classic plate with a slight warble or a deep, washy hall with movement, the Fathom delivers.

Built to perform and easy to integrate

This pre-owned unit is in good working condition and has been fully tested to ensure all functions operate as intended. The compact size, top-mounted jacks, and rugged enclosure make it a perfect fit for any pedalboard. It runs on standard 9V DC power and uses true bypass switching for tonal transparency.

Specifications

• Reverb Modes: Hall, Plate, Lo-fi, Sonar (with shimmer and sub-octave blend)

• Modulation Settings: Light, Medium, Heavy

• Controls: Decay, Dampen, Mix, X, Program Select, Sustain footswitch

• Dimensions: 2.6" W x 4.77" D x 2.3" H

• Power Requirements: 9V DC, center negative (not included)

This guitar effect pedal ships fully insured