Back to the thread topic:
Some years ago a friend and I made some listening tests with the GaborLinks
(a review in Portuguese here
These elements are meant to simulate the skin effect in a cable -- in different intensity and shape. At the same time it's said to be able to compensate for phase distortion and group delay caused by cables and the entire signal path, hence to recreate a coherent phase response throughout the frequency spectrum. So far the theory.
We listened to my friend's setup with homemade speakers using (no-name) dual-cone fullrange drivers with paper membranes -- nothing spectacular in terms of sound quality or resolving capability, but also not heavily coloring. None of us was placed in the sweet spot between the speakers, and we had different listening angles.
Even with these unfavorable conditions we both could hear significant differences with the different GaborLink elements in the signal path. And astonishingly we agreed to 99% in our judgements about which of them were favorable to the sound and which weren't, to which degree and in which respect. The differences indeed reminded me of cable sound.
So I'd recommend to give the skin effect/phase distortions a try when it comes to measurings. Not in the form of phase measurings, but rather in the form of complex waveforms -- such as a cymbal crash or an excerpt of it, resp. --, if possible analogue or in high-resolution digital (96 or 192 kHz sampling rate) for better signal-shape discrimination/identification due to the avoiding of transient corruption by the antialiasing filter..