I can add a bit of an explanation here as to what’s going on.
Cables have, among others, three electrical properties which are commonly referred to as LCR:
L – Inductance
C – Capacitance
R – Resistance
The magnitude of these properties is determined by a number of factors with the most notable being conductor material, dielectric material, the geometric relationship between conductors, and overall cable length.
L, C and R have an impact on the electrical signal travelling through the cable and in many cases that impact is not the same across all frequencies. Furthermore, since there’s a source of the signal and a load acting upon it the electrical characteristics of those components play a role as well.
By manipulating L, C, and R a cable can become an effective filter through which certain signal frequencies come out looking a bit different than when they went in. In short, cables can be filters if they are engineered a certain way…
Rather than go through all of the ways in which L, C, and R can impact a signal I’ll give a couple of examples of other electrical devices that manipulate those properties in order to modify a signal:
So, through the associative property of internet forum logic it’s safe to say that cables ARE tone controls. A corollary is that really bad cables are crossovers. The exercise is left to the reader