ADVICE FOR USE
The spiral shield should be connected to the amplifier chassis
ABOUT OUR SPEAKER AND MODULATION CABLES
Why silver/copper?
A metal consists of crystals joined together by a more or less conductive oxide, the dielectric.
The resistivity of copper is very little different from that of silver and does not in theory justify a marked qualitative difference.
On closer inspection, silver oxide has the obvious distinction of being a better electrical conductor than copper oxide, which explains the better results of silver cable.
It also turns out that the influence of the dielectric is only really noticeable at high frequencies.
It is well known that the more the frequency increases, the more the electrons propagate through the periphery of the conductor.
We therefore chose a copper core (LCOFC and anti-oxidation treated) covered with a silver plating (also LCOFC and anti-oxidation treated) allowing remarkable results at a still reasonable cost.
To increase the silver conducting surface, a configuration of 19 strands of 0.30 twisted was chosen in order to best control the capacitive problems of the conductors, which are perfectly stable in terms of their molecular structure due to the treatments mentioned above (this cable retains its properties from -90° to +150°C).
Why Teflon?
Any electrical transmission through a cable generates resonances within the cable (who hasn’t heard the EDF cables “singing”?) which are naturally transmitted to its periphery.
As high frequencies are carried by the periphery of the cable, the resonance of the conductor will be particularly disturbing for them.
Teflon is a material with a very high stiffness and a strong power of vibration absorption even in weak thickness, its other characteristic is to be able to adhere perfectly to a metal (Cf the stoves…) to which it binds intimately, it is in that very superior to the flexible or hard PVC usually used (it is also much more expensive..). To check this, strip a PVC-coated cable and a Teflon-coated cable, the former poses no difficulty, the latter, more problematic, shows its stronger adhesion.
Why Kapton?
It is a perfect insulator, stable, which dissipates high temperatures without deforming (see the supports of the moving coils of certain loudspeakers), associated with a helical shielding, also silver/copper (100% coverage), which protects the signals carried by the cable from any external magnetic radiation (see the CE standard).
Why a cross section of 1.77 mm²?
In high fidelity and more generally in low frequency, only weak currents are carried, so a large section has no real justification (20 volts under 8 ohms represent a power of 50 watts). The only thing that counts is the linear resistance, which depends directly on the quality of the metals (pure or impure metals)
Due to the deoxygenation of our cable and the quality of its metals (99.5% pure copper and silver) its linear resistance is only 8 ohms/Kilometer.
For an installed length of 10 metres the damping factor of the amplifier is therefore always higher than 33 for a seen impedance of 4 ohms, which is ideal.
NB: Have you thought about the cross-section of the output leads of the capacitors, the cross-section of the chokes usually used and the cross-section of the voice coils of the loudspeakers?
How can we simply verify what we are saying?
If you are soldering a current copper cable, the heat dissipation (i.e. conduction) is relatively low and you can heat it without burning your fingers near the heating point for some time.
If you have the same experience with our cable, under the same conditions, the heat is immediately intolerable and you have to hold the conductor with clamps to avoid burning yourself.
