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?

OK, Scot

If you consider the noise floor than I can tell that it 99.99999% depend on ELECTRONICS and the rest on wires(as long as they have tight well-soldered or crimped connectors). By acquiring wires with "lower noise floor" or "black background wires" it's meant that lacking one-over-a-hundred-thousand-th fracture for what you're going to pay up a price of nice diamond ring that looks much better visually:-)

Electronics are to be created and designed with influence of wires or allowed tolerance of wire load(that's why different wires act certainly different on components but not to the crazy degree of some "noise reduction").
Electronics that are sencitive to wires and "like" expencive ones such as Valhalla or Nirvana stuff meant to be designed with super-conductive wires(I scientifically assume) i.e. with zero impedance at any length.

To some point designers of audio components sacrifice the noise canceling for the shorter and more transperent signal path. In this case the solution to the reducing noise floor is using less-sencitive(efficient) speakers and possibly power conditioners. MIT wires are also can be a cost-effective solution(with noise canceling networks) in that case(except mega-priced ones) but that also reduces transperency that had been originally meant.

As to actively shielded ones how many outlets extra you're going to need if you use them? It seems by killing RF you're waking up more AC(if applicable)

What are they ?

Sounds like one may risk getting electrocuted by these things.

Do you mean the Audioquest DBS system? This is available on a whole range of cable types. Do you mean the cables for the sort of speaker used in Public address systems? There are powered (active) HDMI cables which boost the signal for very long cable runs. 

I use the Gold Series power cables from Cullen Cable for my two powered subwoofers. They are very reasonably priced and beautifully handmade.   The power flow goes from the wall socket to a Shunyata Hydra-2 power conditioner via a Shunyata Venom 14 HC power cable and then from the Hydra-2 to the subwoofers via the two Cullen Gold Series power cables.  With this sort of complex power delivery, it is hard to identify the respective contribution of each component.  However, the Cullen products certainly seem to carry their own weight.  Overall, the sound from 80 Hz down in my system is amazing == clear, powerful, and easily delineated among tones, even at 28 Hz and lower.  They are well worth considering; the site is www.cullencable.com.