I have had a few (including the president of Earthquake Joseph Sahyoun directly) of different amp manufacturers (Simaudio, Bel Canto), tell me go directly to the outlet and bypass power conditioners with an amp. I had a few lengthy conversations with Joseph or Earthquake regarding this very thing and he was absolutely ADAMANT about never ever plugging his amp into any power conditioner.
Once I unplugged my Simaudio Titan from my Furman Elite 20pfI and went direct to the outlet I noticed immediate improvements! It was crazy actually how much clearer and livelier the sound becamse. This was after reaching out to Sim directly about this. That's good enough for me...