Walrus Audio Silt Harmonic Tube Fuzz

The Silt puts a 12AU7 tube at the heart of its fuzz circuit - delivering warmth, harmonic complexity, and bone-rattling grit that solid-state designs simply can't replicate.

The Silt is a tube-driven fuzz built around a 12AU7 - and that distinction matters. The tube section adds a warmth and harmonic complexity to the fuzz that purely solid-state designs rarely replicate: bone-rattling low end, genuine grit, and overtones that feel alive rather than processed. A Contour control toggles between highpass, flat, and lowpass curves in the pre-tube EQ stage, making the Silt adaptable across pickup types and playing styles without compromising its core character.

Harmonic Mode engages a frequency doubler before the drive section, adding a crispy, octave-like edge that works particularly well for lead tones with the guitar's tone knob rolled back. The pedal runs anywhere between 9V and 12V - the higher voltage option pushing gain further for those who want to explore the outer edges of what a fuzz can do. True bypass relay switching keeps your dry signal intact when the pedal is off.