Discover the essential sounds of ambient reverb with the Walrus Audio Fundamental Series Reverb. Designed to deliver professional-quality effects with intuitive controls, this pedal offers three distinct reverb algorithms to shape your tone effortlessly.

The reverb options include a spacious hall, vibrant spring reverb, and rich plate emulation—perfect for adding depth and character to your sound. Three simple sliders control Decay, Feedback, and Mix, allowing precise adjustment of reverb time, signal feedback, and blend between clean and effected tones.

Designed and built at Walrus Audio’s Oklahoma City headquarters, this pedal combines tonal integrity with ease of use, making it a must-have for beginners and seasoned players alike.

Main Features

• Three Reverb Algorithms

  • Hall: Emulates the vast, diffused sound of an acoustic hall with long decay times
  • Spring: Captures the classic bouncy twang of vintage spring reverbs
  • Plate: Produces smooth, dense, and focused analog plate reverb tones

• Control Sliders

  • Decay: Adjusts the length of reverb tail from minimum to maximum
  • Feedback: Sets the amount of wet signal fed back into the effect
  • Mix: Blends the original clean signal with the reverberated sound

• Trails Mode
  Allows reverb tails to fade naturally when the pedal is bypassed, adding a more musical decay behaviour. Easily toggled on or off during power-up.

• Simplified Operation
  Three sliders and a three-way switch provide immediate control, ideal for musicians seeking quick, professional results.

• Handcrafted in the USA
  Assembled in Oklahoma City for uncompromising quality and reliability

Specifications

• Reverb Types: Hall, Spring, Plate
• Controls: Decay, Feedback, Mix sliders; three-way algorithm selector switch
• Power: 9V DC centre-negative power supply
• Bypass Mode: True bypass with optional trails mode
• Dimensions: Standard stompbox size
• Weight: Lightweight, pedalboard-friendly

Frequently Asked Questions ➤ What is trails mode, and how do I activate or deactivate it?
Trails mode lets the reverb tails naturally fade out after you bypass the pedal instead of cutting off abruptly. To toggle trails mode, hold down the bypass switch while powering on the pedal. A flashing LED indicates trails mode is off; when the LED stops flashing, trails mode is on.
➤ Can I use this pedal with both guitar and other instruments?
Yes, the Fundamental Reverb works with any electric instrument or audio source where you want to add ambient reverb effects.
➤ What power supply do I need for this pedal?
The pedal requires a standard 9V DC centre-negative power supply, commonly used with guitar pedals.
➤ Is the pedal true bypass?
Yes, the Fundamental Reverb features true bypass switching to preserve your tone when the effect is off.
➤ How do the Decay, Feedback, and Mix controls affect the sound?
- Decay controls how long the reverb lasts
- Feedback determines the amount of wet signal fed back into the effect, influencing tail density
- Mix adjusts the balance between unaffected and reverberated signal to suit your preference

Outside the UK?

Please note that shipping costs outside the UK are very approximate and can vary radically. Please contact us with your Country and Post/Zip Code for an accurate quote. Many thanks. Please also note if you are outside the UK we will not charge you tax on your purchase but you may be liable for import duty in your country.

Please also note that all our stock is sold for the UK market. If you are buying from outside the UK, please check that it is suitable for use in your country before purchase.