Pre-Owned Walrus Fundamental Distortion


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Walrus Fundamental Distortion


Step into a world of sonic exploration with the Fundamental Distortion, part of Walrus Audio's esteemed Fundamental Series. This pedal is designed to provide professional-grade tonal integrity while offering a simplified control interface that even beginners can master. Whether you're just starting your pedal journey or you're a seasoned pro, the Fundamental Distortion promises to be a faithful companion from your first band practice to headlining an arena.

Three-Mode Distortion

The Fundamental Distortion boasts a versatile three-mode distortion engine, making it a sonic chameleon that adapts to your playing style. From dark and doomy textures to searing cutting leads, this pedal has it all. The intuitive controls include:

  • Gain: Adjust the Gain slider to dictate the intensity of distortion applied to your guitar signal.
  • Tone: Fine-tune the frequency response post-distortion with the Tone slider. Shift it left for a darker tone or right for a brighter sound.
  • Volume: The Volume slider sets the overall output level of the pedal, ensuring your signal is heard loud and clear.

Three Distinct Flavors

The slide switch on the Fundamental Distortion is your ticket to a world of tonal possibilities. It allows you to toggle between three distinct modes, each with its unique clipping modes and tone profiles:

  • Dark: Experience asymmetric silicon clipping with an added high-frequency cut for a dark and dynamic texture.
  • Si: Embrace classic silicon hard clipping diodes that deliver compression and crunch.
  • LED: Engage LED hard clipping diodes, providing a dynamic and crunchy sound.

Please note that the LED clipping mode will produce a louder output, so be ready to adjust your Volume slider accordingly. The Fundamental Distortion features an eye-catching Black finish with yellow and off-white ink, encased in a robust diecast enclosure measuring 4.33" x 2.16" x 1.61”. Power it with a 9VDC source (100mA minimum), and we recommend using an isolated power supply for optimal performance.


  • Pedal Type: Distortion
  • Modes: 3 (Dark, Si, LED)
  • Controls: Gain, Tone, Volume
  • Dimensions: 4.33" x 2.16" x 1.61”
  • Power Requirements: 9VDC (100mA minimum)
  • Power Supply: Isolated power supply (Daisy chain power supplies not recommended; power supply not included)

This pedal works nicely as intended and is in very good condition, exhibiting only gentle external wear as can be seen in photos.


Type: Effects