Electro-Harmonix Germanium 4 Big Muff

Individual overdrive and distortion with the ability to stack them together

4 individual Germanium Transistors

Each mode of drive mode uses its own 2 germanium stack

Overdrive and distortion can be stacked utilizing four germanium transistors

Bias and tone control define the tonality in overdrive

Volts and Bias define the way the distortion will react

Starving battery sound through volts control adds character