Stomp Under Foot Silverfish

The Stomp Under Foot Silverfish is a fuzz pedal with a built-in octave-up circuit, handmade in the USA. Stomp Under Foot describes it as delivering "a full, harmonically rich fuzz that responds beautifully to your guitar's volume control," with the octave-up side of the circuit reacting to which pickup you use and where you play on the neck¹.

How the octave-up responds to your pickup

The defining feature of the Silverfish is that its octave-up circuit is voiced to interact with pickup selection. Stomp Under Foot says the octave-up "truly comes alive when using the neck pickup"¹. Switch to the bridge pickup and the maker describes a different character: lower notes take on a doubled quality, producing what the maker calls "an almost ring-modulator-like effect"¹. In practice, that means the pedal behaves like two different octave fuzzes depending on where your pickup selector sits, and rolling back the guitar's volume knob cleans up and shapes the fuzz in the usual way.

What the maker says the Silverfish does:

• Delivers a full, harmonically rich fuzz that responds to the guitar's volume control¹
• Octave-up circuit that comes alive on the neck pickup¹
• Doubles lower notes on the bridge pickup, with an almost ring-modulator-like effect¹
• Excels with lower tunings while maintaining excellent note clarity¹
• Remarkably balanced tone across the entire frequency range¹

Tone and tunings

Stomp Under Foot describes the Silverfish as excelling with lower tunings, maintaining excellent note clarity, and offering a remarkably balanced tone across the entire frequency range¹. For players in drop tunings or on baritone guitars, the maker's description points to a fuzz that keeps individual notes distinct rather than collapsing into mush, with the octave-up doubling strongest on the lower notes through the bridge pickup¹.

Power and practical details

The Silverfish runs on a 9V battery or a 2.1mm 9V adapter only, and it is true bypass, so it sits out of the signal chain entirely when off¹.

Who uses it

Stomp Under Foot lists Sean Rea of King Buffalo as a Silverfish user¹.

Where it sits in the Stomp Under Foot range

Stomp Under Foot builds a wide range of fuzzes, many based on documented Big Muff variants such as the Green Russian, Ram's Head and Op-Amp Fuzz, alongside original designs like the Sonic Generator. The Silverfish stands apart in that lineup as the maker's fuzz with an octave-up circuit that responds to pickup selection. For more on the effect type, see Fuzz Pedals and Octave & Pitch Pedals¹.

Questions