Albert-Richard 2 – 1201 Geneva – Switzerland
Call or email us +41 22 731 62 72 or

Leadmusic, Geneva - Switzerland
2 rue Albert-Richard, +41 22 731 62 72
CHF 350.00 VAT 7.7% included. Without shipping costs.

The Microtubes B7K Ultra features all the versatility and sonic possibilities its predecessor is known for plus amazing features: A dedicated Footswitch to engage the overdrive section independently. A Master volume to control the overall unit level. Three way toggle switches for each mid control, with a total of 6 different mid frequencies at your disposal the B7K Ultra allows you to create and tailor your tone to perfection: From crisp, punchy clean preamp to obliterating high gain distortion, and everything in between. The B7K is an universal tone crafting machine.



  • Boutique hybrid JFET & CMOS gain stages overdriv
  • 4 bands EQ
  •  XLR balanced line out
  • lift/ground switch
  • New Distortion footswitch
  • New Master Volume
  • New 3 positions toggle switch for Mid Freq Range
  • Level: Controls the level of the Overdriven Signal
  • Blend: Allows mix of clean signal with overdriven
  • Drive: Sets the amount of preamp gain
  • Grunt Switch: Choose between 3 different Bass boost levels before the gain stages
  • Attack Switch: Features the same as “Ultra Hi” option in most tube bass amps
  • True bypass relay
  • power by 9VDC-12 VDC center negative power supply (no battery snaps)
  • handmade in Finland