his pedal combines two iconic Fuzz Face Distortion sounds, featuring the snarling, high-gain aggression of a silicon transistor and the smooth, shaggy warmth of a germanium transistor in a single circuit. This pedal is powered by one 9-volt battery (remove bottom plate to install), a 9-volt AC adapter such as the Dunlop ECB003/ECB003EU, or an MXR Brick Series power supply.