La Rosita 5 avenue Jean XXIII 06130 Grasse - France

More information about Cables

 

 

You're browsing the Internet searching for the right equipment to upgrade your sound system. If you're looking at Hi fidelity manufacturers, the quality of sound (and silence) makes a difference.

 

So what type of cables should use? Hi Fi cables are often expensive, and the increased quality of the sound they are supposed to procure is rarely commensurate with the expense.

 

If anything else, you should know that the "technology" of cables is nothing new. In fact, everything that we know today regarding the displacement of electrical current was described by Georg Simon Ohm, a German scientist who passed away in 1954.

 

All conductors are said to be "ohmic", which means that they have intrinsic resistance which creates an opposite force to the flow of electricity. Supra conductors have no such resistance but that property only occurs at temperatures below– 250 °C.

 

The intrinsic resistance of cables is the primary factor which is detrimental to the reproduction of music.

 

We spent quite a bit of time and effort analyzing many of the "best" cables money can buy and, quite frankly, the sales pitch for such cables is more theory than practical reality.

 

What is true is that the properties of an audiophile cable are only as good as the metal from which it is made. There are indeed many different grades of copper and silver. Without getting technical, the copper used for plumbing is obviously not suited for hi fi cables. And as for silver, because it is a soft metal which needs to be mixed with other metals in order to be manufactured, the quality of the alloys used for this purpose is also important.

 

In this regard, many manufacturers will refer to the so-called "skin effect" to sell so-called high speed cables; this, at best, is misleading. The speed of electrons is indeed greater at the periphery of a wire, and slower towards its core.  But at the periphery of the cable you will only get the top speed of an electron; the velocity of electrons cannot be accelerated unless you are using a particle accelerator. Moreover, this difference of speed is inevitable regardless of the metal used in the wire, and will only affect the behavior of the electrical current at very high frequencies, i.e. between 250kHz and 400kHz !!!  Such frequencies, barely measurable by specialized equipment, are inaudible. Remember that the reproduction of sound takes place in the low frequency spectrum, i.e. between 15 et 25kHz; and this is a generous range beyond which sound is inaudible. The point is that cables composed of multiple wires designed to increase the number of peripheries will only carry more inaudible frequencies.

 

We analyzed the quality of signals carried in the low frequency spectrum (currents, voltage, average impedance, and the distances over which signals are carried), and the results confirmed that a VERY LARGE range is available for all of the relevant parameters well before any disruptions or influence on the transport of the signal and its integrity occur.

 

In conclusion, buying a fat and therefore expensive cable doesn't really add anything.

 

Another pitch relates to the purity of the copper used in the cable because it was de-oxygenated, often referred to as "OFC" (Oxygen free Copper). But de-oxygenation is merely the result of the process of electrolysis used to separate copper from other alloys and impurities it is laced with when it comes out of a mine. The electrical wires in your household are also de-oxygenated.

 

Another parameter which may be of importance is the cable's impedance. But a cable will never have a substantial effect on the adaptation of the impedance between a unit of a sound system and the units which are upstream and downstream from it. Impedance issues are solved by a proper selection of the units of a sound system whose respective impedances are compatible (especially if you are using units from different manufacturers).

 

Another parameter is the MDI theory of Pierre Johanet called (or Micro Discharge Interface) which describes the effects of the interaction between the copper wire and the insulating material in which the copper wire is wound. The interaction creates a sort of halo of particles surrounding each cable whose behavior can be modified by the mechanical excitement of the air created in large part by the sound system's speakers. This may affect the transport of the current although there is still little certainty regarding the nature of the halo. But the plating that covers most cables (usually with plastic or expensive alloys) is not only ineffective, it may even the worsen the interaction phenomena.

 

So the point is: a cable for audiophile system need not be a beautiful object that looks like a piece of jewelry, it must simply be built to be as transparent as possible taking into account the basic rules of construction of a cable (in particular the behavior of electric current passing through an alloy wire) used for the reproduction of music.

 

Our aim was therefore to create a cable which would be as transparent as possible; in other words, a cable which would behave as if there was no cable between the various units of the sound system.

 

So how did we create the La Rosita cables?

 

1) We used a very high grade of copper silver which also ensures that the surface of the copper will never be oxidized;

2) We used only three wires with a relatively thin gage which reduce the cost of the raw materials;

3) We used the surrounding air to act as insulating material. This is achieved by "trapping" a film of air around the copper wires by enveloping them with cotton and silk. The silk is laced with a special "grip" which avoids any slippage of the cotton over the wire's surface. Moreover, cotton has natural damp-proofing qualities.

 

The result is a fully transparent cable at a fraction of the cost of high end audiophile cables.

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