Powered Speaker Cables

I've never heard of powered speaker cables.

Whaaat???

You maybe messing up with networked cables such as MIT, Transperent that kind-a shunt reactance in the middle-way to the signal but at the same time increase the current loss so not every time the system will benefit from them...
Cable networks are 100%passive and I've never seen any active ones if that what you realy mean.

In my experience MIT or Transperent you should use when you need to tame hi-res brightness.

Do you mean the actively shielded cables, made by Synergistic?

Maybe Power cords for powered speakers?

I use transparent powerlink plus on my amp(bryston 4b-st) with a noticable improvement in bass extension.

I used a MIT z-cord on my pre/pro (Rotel rsp-976) with very little change, maybe a little blacker.

These are both relatively inexpensive cords, especially if bought used.

I imagine that Powercords for powered speakers would/could make an improvement.

Yes, speaker cables. The ones I saw were by Synergistic. I think MIT has some as well? Is that what they are is "actively shielded"? The guy said it really helps. Would that help the noise floor so that things are really quiet?