I was impressed with what my Quintessence did for me. Another member tried one after I did and he wasn't so impressed. It depends on the incoming AC and what a person has plugged into their home AC line and the home's AC set up. If you wanted to be wow'd by the power cords plug one into your phono stage if possible. That was the unit that benefited the most in my system when I upgraded power cords. Second was the CD player. Placement of my Audio Note DAC made it impossible to upgrade so not sure how that will work.