Darkglass Electronics Harmonic Booster Bass Preamp Pedal

Darkglass Electronics

Designed to be the perfect complement to our distortion circuits, the flexibility and portability of the Harmonic Booster is also the perfect one-stop solution for gigging musicians in search of a precise and harmonically rich clean preamplifier.



  • Flat -20dB to +20dB cut or boost


  • Allows blending in the perfect amount of the tone-shaping circuitry. It can be set counter-clockwise for a flatter frequency response

Mid gain

  • +-20dB @ the frequency selected by "Mid Frequency"

Mid Frequency

  • Mid frequency from 250Hz to 2.5kHz


  • +-20dB @ 80 Hz


  • +-20dB @ 5 kHz


  • 75x111x43 mm (2.95x4.37x1.77 in)


  • The Harmonic Booster has a current draw of 30mA. Only use a regulated 9V DC adapter with a center-negative plug. Due to ecological reasons, it does not accept batteries. Unregulated power supplies and/or higher voltages may result in suboptimal noise performance and even damage your unit, voiding the warranty.


Collections: Effects

Category: Darkglass Electronics, Effects/Pedals

Type: Pedals