When Darkglass Electronics created the Microtubes B7K they built upon the already solid foundation they created with the Microtubes B3K. They utilised the same, powerful distortion circuit and added a four-band EQ as well as switches to change the frequencies the mid bands affect. The B7K also features a balanced direct output to allow the bass player to plug directly into a PA system or recording setup. Oxygen Music is excited to stock a number of Darkglass Electronics pedals, amplifiers, and cabinets including the Microtubes B7K preamp pedal.