Just speculating, but it seems to me to be possible that even if both of the cables Cymbop compared were unshielded, differences in their characteristics may have resulted in differences in the coupling of RFI or digital noise from the cable into his system, resulting in the sonic differences he perceived. If so, I would not expect a great deal of consistency between the results he experienced and the results of a comparison between the same two cables as performed in different systems, or even in a system comprised of the same components but having a significantly different physical arrangement.
And I would expect that any relation between the improvement he experienced and the fact that the Blue Jeans cat6a cable is spec compliant, while the Monoprice cat6 cable may not have been, would be an indirect one at best. Spec compliance helps to assure that the cable will perform its function reliably, but does not have a direct relation to minimizing possible effects of the signals and digital noise being conducted by that cable on other cables or power cords or component circuitry which may be nearby.
Best regards,
-- Al
And I would expect that any relation between the improvement he experienced and the fact that the Blue Jeans cat6a cable is spec compliant, while the Monoprice cat6 cable may not have been, would be an indirect one at best. Spec compliance helps to assure that the cable will perform its function reliably, but does not have a direct relation to minimizing possible effects of the signals and digital noise being conducted by that cable on other cables or power cords or component circuitry which may be nearby.
Best regards,
-- Al