It's from Darth Malak - An Expanded Universe Character from Star Wars: Knights of the Old Republic and this is the whole quote:
An imposing figure with ghostly pale features, prominent Sith tattoos, a gleaming red lightsaber, and devastating Dark Side power, Malak struck terror into the hearts of his fromer allies. He also wore a vocal mask that may have concealed a form of cybernetic life-support. Did it provide him with powers far greater than even Exar Kun or Freedon Nadd, or was cybernetic enhancement too simple an explanation?