Darkglass Vintage Microtubes Bass Preamp Pedal

92 out of 100. Incorporating 175+ ratings and reviews.


  • Overdrive tone is slightly muffled, according to some users.
  • Lacks a DI output.


  • Intuitive operation without complex controls.
  • Functions both as a preamp and an effect pedal.
  • Effective Tone Control.
  • Well-regarded by many bass players for its performance.

The Darkglass Vintage Microtubes is a bass preamp pedal with versatile overdrive, thanks to its “ERA” knob which lets you go from ’70s era midrange heavy to modern metal punchy bass tones.

With only four knobs, this unit may seem like a streamlined pedal, but the controls in place allow for in-depth control over the preamp and overdrive effect.

The Drive knob lets you adjust overdrive saturation, Level knob adjusts the volume of your overdriven signal, and the Blend knob lets tweak the balance between your clean and overdriven signal.


  • Preamp: Darkglass Vintage Microtubes
  • Controls: Blend, Era, Level, Drive
  • DI Function: None
  • Input: 1 x 1/4″
  • Output: 1 x 1/4″
  • Power: 9V DC power supply (sold separately)
  • Dimensions: 2.95″ x 4.37″ x 1.77″
  • Weight: 0.55 lbs

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