Вот что пишут "плохо усвоившие":

http://www.xloelectric.com/dictionary.html

Why doesn`t XLO use silver conductors for its cables? Isn`t silver better? Although they`re not all specifically voiced, they are really three questions in one: Why doesn`t XLO use silver? Doesn`t silver work better? Doesn`t silver sound better? Let`s deal with them one at a time.

First of all, the question "Why doesn`t XLO use silver?" is misleading because, until just recently, XLO did use silver conductors. These were the silver conductors at the very center of the "Precious Metal Composite" conductor array in XLO`s least expensive speaker cables, XLO/VDO models ER-15 and ER-16.

Both of these cables used multiple layers of conducting wire, each layer of a different effective resistance, as a cheap and efficient way of controlling "skin effect phase shift". Because of its low DC resistance, silver worked very well in that application, but we would never use it in any of our better cables.

Which brings us to the second part of the question "Doesn`t silver work better?" Many people think that because of silver`s low resistance (it has the lowest internal resistance of any natural metal) it ought to be more conductive than other metals. They also think that its presumed better conductivity ought to make for better cables. In fact, that`s just not the case.

For one thing, in an audio or video application, silver isn`t consistently more conductive than copper. Conductivity is the ability to pass a current. For a DC current, conductivity is exactly the opposite of resistance, and if we were dealing with DC, silver`s lower DC resistance (it`s 11% less resistive to DC current flow than copper) really would make it a better conductor. Music or video signals aren`t DC, though, they`re AC, and that makes a huge difference!

With AC currents, inductance becomes an important consideration. Silver is inherently more inductive than copper, and, when an AC current is passed through it, its greater inductive reactance creates a steeper AC resistivity gradient between the center and outside of a silver conductor than would be the case in a copper conductor of exactly the same physical characteristics. [u]This results in, among other things, significantly higher "skin effect" phase shift as compared to a copper conductor, [/u]and it is an important contributor to the characteristic "silvery" sound of most silver-conductor cables.

If the issue were just resistance, it would be easy to make silver and copper cables equal: Copper has 11% more (DC) resistance than silver, so just using copper cables that are 11% shorter would make the resistance exactly the same. The fact, though, is that resistance simply isn`t the issue!

Another thing that isn`t the issue is cost. People sometimes assume that because silver coins are generally more valuable than pennies, silver must be more expensive than copper. That`s not necessarily true: While ETP copper (the stuff that pennies and household electrical cables are made out of) is certainly cheaper than silver (at about $0.68 as compared to $4.65 per ounce), Laboratory Grade copper (the specially processed high-purity copper specified by XLO for use in all Reference2, Signature2, UnLimited Edition and Limited Edition cables) currently sells for as much as $12.21 per ounce. This is more than 2 _ times the price of silver, so if silver really were any better than copper, we would rush to use it.

Which brings us finally to the question "Doesn`t silver sound better?" We don`t think so, but that`s because we don`t think that cables should have any sound at all!

Even people who like silver cables agree that they have their own characteristic sound. Silver cables tend to give everything that passes through them a "shiny" or "silvery" quality that might be quite seductive, but that`s NOT part of the music or the sound that`s actually on the recording. That isn`t what XLO is all about. We believe that cables should just pass signal from one point to another, without adding, subtracting, distorting, coloring, or in any other way imposing their own voice on what you hear - even if the change are, as with silver`s characteristic coloration, something that some people might like better.

"Hi-Fi" is a contraction for "High Fidelity", a term which originally referred to a philosophy of sound recording and reproduction that held to "a high degree of fidelity (faithfulness) to the actual sound of the original music. That`s still what XLO believes in, and that`s why we don`t use silver in our cables.

От жеж недоумки..нет бы в школу походить,физику там поучить и вообще....