The EHX Nano Bass Big Muff Pi replicates the classic Russian Big Muff, with no low-end loss. The 3 knob design of volume, tone, and sustain follows the classic Big Muff configuration, and the bass boost EQ reintroduces your low end when the tone is set for high frequencies. The dry switch allows you to add your dry signal to the distortion, or use 100% distortion. This is the Nano version of the Bass Big Muff Pi, which is largely the same pedal, just shrunk into a smaller casing for a smaller pedalboard footprint. Oxygen Music is proud to stock a range of Electro Harmonix products, including the Nano Bass Big Muff Pi.