Electro-Harmonix Bad Stone

Electro Harmonix

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Electro Harmonix Bad Stone Phase Shifter 

The EHX Bad Stone Phase Shifter is a faithful reissue of the original with the same circuit design and three knob control layout. There have been enhanacements for the moden player though, including die-cast packaging, true bypass for maximum signal path integrity, an effect status LED and an AC jack that accepts an EHX9.6DC power supply.

The Bad Stone delivers six stages of phase shifting plus a manual mode that lets the player freeze the phase. Its Rate knob controls the phase shifting speed which goes from a very slow swoosh to a rapid, oscillating warble. Feedback determines the depth of the phase effect and a toggle switch lets the user select Auto or Manual modes.


  • A faithful reincarnation of the legendary 1970s Bad Stone with carefully selected updates for the modern player
  • The Bad Stone was the first phase shifter to employ variable feedback and features an awesome six stages of phase shifting
  • Manual Shift mode that lets you freeze the phase
  • Compact, rugged die-cast package
  • True bypass switching for maximum signal path integrity
  • Effect status LED
  • Built-in AC jack that accepts an optional EHX9.6DC power supply, comes with a 9V battery

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