Does an Audioquest Niagra 1200 limit amplifier dynamics?

I just bought the Niagara 1200 , My art audio concierto amp is connected on the high current section, Dynamics and noise floor improve. In my system I don’t sense the power is  affected at all.

@j-wall Very helpful. I could get the PS Audio on trial, but it would be nice to measure first before laying down thousands. 

I just completed a test with my Niagara 1200. I did not detect a difference in the quality of music when I connected my Luxman 590 AX II Integrated into the Niagara 1200 High Current outlets vs the other outlets on the Niagara 1200, vs my dedicated 20 amp wall outlet. I have not owned or auditioned it but I agree with markiew ((above), the Puritan Audio PSM 156 could be the answer to several issues that others are having.

I have the Puritan 156 and the Isotek Sigmas EVO3, and while the Isotek is good, the Puritan is better (and less expensive).

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...