The Greer Amps Custom Shop SOUL THRUST FUZZ UNIT is an amazing sounding fuzz. This pedal is a two transistor fuzz pedal, utilizing NOS BC107B transistors. The Soul Thrust Fuzz Unit is built on a vintage style tag strip, with amplifier grade components, including 1 watt Carbon Film resistors, full size Bourns pots, and a mix of Panasonic ECQ and Mallory 150 type capacitors. This pedal features Volume and Frequency controls. The Frequency control allows for a wide range of tone. Fuzz is controlled by the guitar's volume control--want less fuzz? Roll your guitar volume down a bit, and the level of fuzz will decrease! This pedal sounds like a cross between a Germanium FF type fuzz, and a "Bender" type fuzz...mean and aggressive, this thing will kick out the meaty grind you're looking for!