Our company produces all cables independently. They are necessarily equipped with company logos, which are engraved on aluminum parts in our laboratory. This is a very tedious job that requires a lot of time, but we specifically use technologies that, with basic analysis, exclude the production of amateur versions of cables. For example, the use of heat-shrinkable casings and similar amateur elements is not allowed in our cables. Soldering wires to miniature USB type-C connectors is possible only with professional equipment and appropriate optical instruments. This process also preliminarily involves the production of a special miniature printed circuit board. The cable pinout, like everything else, is not just wires soldered to pins. This is a very difficult task, for the solution of which modern standards of operation of the latest USB type-C interfaces were analyzed in detail, including plans for its further improvement. This connection principle for example implies the possibility of connecting active devices to the headphones in the future, such as portable amplifiers or even wireless music receivers (why not?))). It will also be compatible with our headphones already sold. At the same time, of course, the possibility of purely analogue use of the product will be fully preserved. We are sure this is the only correct approach. In general, all Binom-ER headphone cables are divided into two groups. These are cables made of pure oxygen-free copper and cables made of silver-plated copper. Silver-plated cables have the index “1” in the name. Pure copper ones have the index “2”. The cables are not marked and can be optically distinguished by color. The outer layer of insulation of copper cables is 20% transparent, while the transparency of the outer layer of silver-plated ones is 80%. In other words, silver-plated cables are light while copper ones are dark. The optical difference between raw cables can be seen in the picture.