Dark Prophet contains 20 dark synths for U-He Repro 5 synthesizer. For most of the patches there is an obvious saturation coming from the distortion unit and/or the Velvet device in the effect section. If you need a cleaner sound disable one of both or them.
 
Those dark synths are “shining” in lower register of the keyboard and due to the energy in lower mid and bass frequencies it is advised to use a small amount of polyphony in performance (still a matter of taste though).
 
Presets were designed with Repro-5 9669 and run best with this or newer edition
 
REPRO-5 ® is a registered trademark of Heckmann Audio GmbH