A state-variable filter with wide range and application. Versatile. Combining tilt and notch/boost equalization around a 2nd-order (-12dB/octave) state-variable core.

Very much a one-band parametric equalizer with gritty extras:

Shelving filter, from low-pass to high-pass
CV inputs for resonance (Q) and frequency (F)
V/octave scaling synthesizer interface
Fully variable Q goes well into tasty sweet self-oscillations
Soft clip zener zesty mordant
Expression pedal input controls center frequency

Official Product Video

Demo by Cyberattack

Review by Pedal of the Day

Review by The Gear Page

Review by reddit /guitarpedals

Manual

Product Page

Long Life

Shallow water
K-Field Modulator

Poolside conversations while staring at your own reflection. The depths of which shall never be known, at least not for another couple thousand years. So it goes.

Before the reflection, is the experience. Before phenomena, or even noumena, is that which is undefinable. That which has never been heard, that which will never be heard again and that which has always been heard but never listened to.

K-field (Simulation mathematics), an  undefined, two-dimensional, non-linear field where past and future forces interact at irregular intervals. Shallow Water generates this k-field by randomly modulating a short time delay to create unexpected shifts in pitch. The result is this non cyclical vibrato/chorus/flanger-type thing favouring old tape flavours.

The water is shallow on this side of the pool. Do not dive and you will not drown.

Product Video by FairfieldCircuitry

Shallow Water

The Fairfield Circuitry Four Eyes is a unique and versatile fuzz pedal that features three parallel JFET fuzz circuits driven by a voltage controlled state variable filter with resonance control and mu-amp input stage. This pedal is designed to offer a wide range of tonal possibilities, from extreme to relatively subtle, and from super thin to ridiculously fat.

Demo by Iga Massardi

Review by delicious audio

Review by guitar moderne

Official Website

Four Eyes

And when things are combined, is anything lost? And when something is lost, will there ever be more?

But what is the gain?

The ~900 is a ferocious fuzz pedal featuring two cascading JFET gain stages. Tracing its lineage back to our discontinued Four Eyes Fuzz, it offers a very wide range of gain, adds delicious harmonics and, if given the opportunity, will slap the ice cream cone right out of your hand.

All Fuzzes
Are Friends
AF

Demo by collector//emitter

Demo by Emily Hopkins

Review by Perfect Circuit

~900

This pedal produces no sound. Instead, the signal passes through to generate a control voltage that can be used to breathe life into other pedals. The dynamics of your instrument translate to fluid and expressive movement.

Versatile CV source; envelope follower and generator, LFO, slew limiter. Compatible with either 1/8″ or 1/4″ expression/control voltage inputs

“We open in order to listen to the world as a field of possibilities and we listen with narrowed attention for specific things of vital interest to us in the world” - Pauline Oliveros

Demo by Harp Lady

Review by reddit /basspedals