Darkglass Microtubes B7K 10th Anniversary Edition Bass Preamp Pedal

Current price: Current price: $349.99


Offer available through 5/31/23.
Item is in stock and ready to ship! Item is in stock and ready to ship!
Darkglass Electronics Limited Edition Bass Guitar Preamplifier Effects Stompbox with Dynamic Saturation and Four-Band Equalizer in Commemorative Wooden Box and Black Obsidian Finish with Icon-Only Engraving

Darkglass Microtubes B7K combines powerful dynamic saturation with a four-band equalizer and a balanced line driver for tremendous versatility. Designed for both studio and live use, it will take your direct sound to a whole new level.


An innovative distortion immediately embraced by musicians around the world now represents the foundation of the Darkglass tone, after which followed a decade of iteration marked by a strong stamp of passion and desire for tone.

This limited edition is a celebration of the pedal that got Darkglass started, a tribute to every bass player that believed in the adventure of cutting into the mix and a commendation for the incredible support and loyalty Darkglass has received since its humble beginnings.

The exclusive minimal design of the 10th Anniversary Edition features a black obsidian enclosure and textless icon-only engraving, contained within a finely crafted wooden box.

  • Level knob: Sets the volume of the overdriven signal.
  • Drive knob: Sets the amount of saturation in the overdriven signal.
  • Blend knob: Mixes the clean input signal with the overdriven signal. The clean signal remains at unity gain while the volume of the overdriven signal is set by the Level knob, allowing for fine control of the blend ratio.
  • Grunt switch: Sets the amount of low frequency content to saturate by selecting between three different bass boost levels before the clipping stage.
  • Attack switch: Sets the amount of treble content to saturate. The Boost setting emphasizes the treble content extra clarity and presence. The Flat position leaves this register untouched, while the Cut position will reduce the amount of high frequencies being saturated.
  • Low EQ knob: +-12dB @ 100Hz.
  • Low mid EQ knob: +-12dB @ 1kHz.
  • Hi mid EQ knob: +-12dB @ 2.8kHz.
  • Treble EQ knob: +-12dB @ 5kHz.
  • Direct Output XLR output: A balanced version of the 1/4" output, useful for running into PAs or studio mixing consoles.
More Information
Manufacturer Darkglass Electronics
Condition New
Included from Manufacturer Commemorative wooden box
Effects Dynamic saturation
4-band EQ
Bass preamp
Audio Inputs 1/4" main input
Audio Outputs 1/4" main output
Balanced XLR direct output
Pedal Switches Bypass switch
Power Adaptor Regulated 9V DC adapter, center-negative (sold separately)
Width 3.7"
Depth 4.72"
Height 1.81"
Product Weight 0.7 lb

Darkglass Electronics Effects Pedal Warranty

Darkglass offers a two-year limited warranty on its pedals. Please use the serial number to register your product at the Darkglass Electronics website for details.

  • Ground shipping is FREE for all orders $99 and up.
  • Our central, midwest location ensures fast delivery times.
  • See below for transit day estimates. Please note, these are estimates and are not guaranteed.

Generally, package estimated transit days are as follows:

  • Upper Midwest: 1-3 days
  • Central US, South East US, and East Coast: 2-4 days
  • West Central US: 3-5 days
  • West Coast: 4-6 days
  • Alaska & Hawaii: 7+ days
All transit times are based in business days. Please allow 7-10 business days for most freight shipments. Business days are Monday through Friday and do not include public holidays and weekends (Saturday/Sunday.) For questions regarding estimates to your specific location, please contact us at [email protected] or 800-783-3368.


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