Darkglass B7K The Microtubes B7K takes the powerful dynamic saturation circuit...

Darkglass B7K
The Microtubes B7K takes the powerful dynamic saturation circuit of the B3K and adds a four-band equalizer and a balanced line driver for even greater versatility. Designed for both studio and live use, it will take your direct sound to a whole new level.
http://www.basscentre.com.au/collections/all-effects/products/darkglass-microtubes-b7k