Hiero Effects Overwhelmer Distortion


Hiero Effects

Hiero Effects Overwhelmer is a versatile high-gain distortion pedal with a unique character.


  • Drive - adjusts gain,
  • Level - overall output volume,
  • Voice - pre-EQ knob,
  • Mode - changes the tonal and clipping characteristics,
  • 3-way post-EQ switch: center - full range, down - hi cut, up - mid scoop.
  • There is also a trimpot inside the pedal which shifts the notch in the scooped mode.
  • The pedal is powered by a 9-volt battery or an external Boss-style power supply.
  • Switching is true bypass.

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