The electrons in a power cable are like a train with each electron acting as a train car. When a treble note is played, for example, the small gauge wires can react quickly because that “train” has much less mass than a large gauge conductor.
So, lets separate out audible quality from theory. Here, I do not discuss audible benefit, just theory.
I call what the OP posited the multi-way cable theory.
While it’s interesting, and I’ve seen a number of manufacturers take similar ideas either with Litz wiring, or with super low metal content connectors, I think it’s important to talk about how most linear power supplies work.
First, the incoming supply is 50 Hz or 60 Hz. That’s the signal you want to reach the power supply, so you do NOT want high frequencies coming in or going out. Anything besides these 50/60 Hz is noise and distortion.
Next, the power supply itself acts as an extreme low pass filter. It is trying to remove everything above DC. Again, you do NOT want high frequencies passing through it. In a separate thread there was an electrical engineer discussing how noise would make it past the power supply. Making power cables like you do audio cables (i.e. super transparent) would only make that worse.
Now, OP, I’m not arguing whether your power cables made a difference. I’m only arguing that the idea of transparency in a power cable is probably not you are liking about them.
In fact, I might argue that a cable with some impedance, and built in noise filtering is a better way to go.
I don't think that helping different bands be more transparent by itself would work. But!! There's this idea of laminar flow in fluids which is interesting.
https://en.wikipedia.org/wiki/Laminar_flow
You can watch a video here:
https://www.youtube.com/watch?v=990jkBGHaVk&feature=youtu.be
The idea is that water can flow without turbulence, like if it was in layers, and each layer flowed independently of every other layer. That to me seems a better outcome for us in power cables.
It would be interesting to consider that it's' not about high and low frequencies, but about laminar flow of electrons through a conductor.
Of course, there are probably good theories which say it's' irrelevant, having to do with the speed of electrons vs. the speed of the electrostatic field, etc. but there are also some very interesting ways an enterprising soul could use to test if this was in fact working. I will state clearly I do not know. I wish I had time /energy/equipment to measure this, as it would be a fascinating new tool in cable design.
Best,
E