Frequencies addresses by power cords?


For example MIT and Transparent?
ptss
MIT and Transparent both use "Interface Boxes" which are nothing but "glorified" low pass filters that filter most signals above 20KHz.
Thanks Don, more detail would be helpful. I'm most interested in MIT, Shunyata & Equitech. (These mfg's don't provide detailed specs; although I can't imagine why. If they are proud to build it--they should be proud of what it does.(High-end has had enough "magic" & "flooey dust"-not to mention "magic anti resonance dots-wow, that's a great one) over the years and I am certainly hoping our tech advances will soon make "magic" a thing of the past.) I want to create the most effective "blend" of conditioners and power cords. Of course I'm doing well by ear, thanks to Ref Spectral & MIT gear-and an Equitech 2Q providing a basic isolation/cleaning of AC, creating adaquate depth of detail and clarity to analyze the sound I have, but in classical music I enjoy how more details bring me closer the the artistic creativity of the composer, the director and the individual genius of the players, not to mention the ambiance and silences.