Darkglass Electronics designed the Microtubes B3K a decade ago and since then it has become one of the most iconic modern bass distortion pedals. The B3K features the tight and punchy distortion circuit that Darkglass have become known for, as well as three controls for altering the harmonic content of the distortion. Oxygen Music is excited to stock a number of Darkglass Electronics pedals, amplifiers, and cabinets including the Microtubes B3K distortion pedal.