Morse Antique and Vintage Store
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Walrus Audio Fundamental Drive pedal has three faders for tweaking the sound and a three-way switch for changing pedal modes. 
Fundamental Drive

The Fundamental Drive is a versatile overdrive that allows for a wide range of tones thanks to its three-mode switch. This is the perfect tool at the front of your chain to set the tone for your whole rig.

Gain – The Gain slider sets the amount of gain applied to your guitar signal passing through the overdrive circuit.
Tone – The Tone slider controls the amount of high-frequency level reduction.
Volume – The Volume slider sets the overall output volume of the pedal.
Slide Switch – The slide switch allows you to change between three distinct flavors of the pedal. Each position has different clipping modes or tone profiles.
Smooth - A classic soft-clipping silicon overdrive. Clean and smooth.
Crunch - Silicon soft clipping with added hard clipping silicon diodes and a slight low-end boost. Crunchy and edgy.
Bright - Silicon soft and hard clipping from the Crunch mode with a pre-clipping low-end cut. Bright and glassy.   
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