Fairfield Circuitry ~900 Fuzz

They say:

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.

The four highly interactive controls are:

INPUT - input gain
FUZZ - second stage gain
BIAS - second stage bias and gain
VOLUME - output level

All Fuzzes
Are Friends
AF