That can and will roll off at an audible level.
But, if you have modern, well designed components and a cable with average capacitance, then there is only one explanation to your perceptions, biased and unreliable. Good cables are just not tone controls, nor smart enough to tone down specific bands.
What you really need to do is compare the cable under bias controlled conditions, yes, a DBT protocol, and you have to guess correctly on random swaps of cables, 12 out of 15 tries
Good luck. So far, I am not aware of anyone being able to do that. I think even Randi will offer $1million on it.