Cables and connections are extremely sensitive. Physical phenomena that arise during the transmission of signals can only be controlled with technical finesse and the best materials. For this reason all cables are manufactured in a German cable mill and finished by us in Ballrechten-Dottingen in elaborate manual work.
It starts somewhere in the world in one of the mines in which copper ore is mined. From there the material is delivered to Germany, liquefied in melting pots in copper smelting plants in northern Germany.
In order to create the purest possible, most conductive copper, the valuable raw material must first be placed in an electrolysis bath.
For Referenz Selection, only select, highly pure batches are used. Only after this pure material is found in elaborate processes is the copper drawn to the required diameter in several stages fter that it is stranded with air-filled PE tubes in a German cable plant
How do you tease out the last bit of quality from the components?
No idea is too crazy for us in this regard. But we have so far always had the best experience with development based on the fundamentals of electrical engineering and physics. We can now make very good predictions of the sound direction in which a cable will go.
The first phase of development involves unfettered drafting, brainstorming and calculating. Ideas are sometimes discarded and reconceived until detailed technical drawings can be created from the designs. For development and implementation, it is very helpful that our company group has its own cable mill at its disposal. In our in-house finishing plant, we can also build and perfect prototypes."
The air-helix construction is wholly unique. We have developed a special clip to ensure air insulation that is as close to perfection as possible. A large number of these clips form the supporting structure on the inside of the cable. This holds the signal conductor free in the air in a helix form and guides it through the cable at defined intervals. The flexibility of this construction is attained with two bridges that hold the clips together evenly and at exact intervals.
The conductors themselves of course also play a major role. The LS-2404 is made of 24 highly pure copper wires braided on a PE core. The largest currents in the entire audio chain flow through the loudspeaker cables. Part of the correspondingly strong magnetic fields are already compensated by the eight wires on their own. This is ensured by the braided and therefore opposed stranding of the individual wires. Their wafer-thin lacquer coating insulates the wires from each other. The structure ensures greater stability and “peace” in the conductor.
Obviously, the conductors themselves play a key role, too. For the NF-2404, they are made of 32 high-purity copper wires braided around a PE core. A very thin lacquer coating on the wires prevents the formation of eddy currents inside this Super Speed waveguide. A conductor that can also pass on extremely dynamic signal sequences very quickly and precisely
The finding that the loudspeaker cable should primarily have a low inductivity has been optimally implemented in the LS-2404 AIR: The two-layer arrangement of the double-layer multicore allows the conductors to overlap and neutralise the magnetic fields that arise around the individual conductors. This considerably reduces the inductivity of the cable and also allows the high sound frequencies to be transferred without hindrance or time delays.
Every additional material used has negative influences on the signal transmission. Many cables have a subcoating between the coat braid and the wires, made of PVC for instance, which has an unfavorable impact on the electrical parameters. In contrast, the wires of Reference cables are directly braided with a PE network jacket. The cables consist of two materials: copper and polyethylene. The PE network jacket consists of monofilaments that hold the wires together tightly. This reduces micro-vibrations and facilitates the clean conversion of extreme dynamic peaks.
The transmission of acoustic signals is susceptible to many different types of interference: resistance, inductance, capacitance, conductance of the insulation and skin effect have a negative influence on the sound. The conductor material is also very significant. Because every contamination in the conductor material prevents the flow of current, impairing the conductance and increasing the background noise. That’s why we use only especially pure, oxygen-free copper (OFC) with a high conductance in our Referenz cables.
Our technical know-how, which is bundled in Referenz Selection, is also drawn upon for the development of our plugs. Arriving signals are not altered – the sound quality at the end is as pure as at the beginning. For unsurpassed listening enjoyment. This is achieved with the KS-103 cable shoe, for example. The rhodium surface treatment is extremely durable. The contact surfaces and the screw connection are manufactured from a single piece, allowing contact resistance to be avoided.
We have long set the bar very high in regard to quality, because cables and connections are extremely sensitive. Physical phenomena that arise during the transmission of signals can only be controlled with technical finesse and the best materials. For this reason all cables are manufactured in a German cable mill and finished by us in Ballrechten-Dottingen in elaborate manual work.