Yes, I have good power conditioning, focused on parallel capacitance such as probably what's in the plug you mention. I have roughly 300 microfarads of parallel capacitance distributed through my house, with 100 more on the system circuit in a custom designed power strip, and the power cords are plugged into that. My system includes capacitance in all three positions: between hot and neutral, hot and ground, and neutral and ground. I find this system to increase the elegance and refinement of the sound. Once I got addicted to refinement in a revealing system, I don't want to go back. (However, in a less revealing system such as a car radio, I can still enjoy the music.)