The Air Helix design of the Reference USB-2405 AIR is absolutely unique. To achieve near-perfect air insulation, we developed a special clip. Inside the cable, a multitude of these clips form a supporting framework that holds the signal conductors suspended in a helical shape and guides them through the high-density shielding at a defined distance. The flexibility of this design is achieved by two webs that not only hold the clips together but also fix them at the exact distance from each other.
 
In the true sense, "digital" only exists in mathematics in the form of the binary number system. In the technical world, purely digital signals do not exist. Electrical voltage limits and time windows are defined to detect zeros and ones. The jump from a zero to a one, or vice versa, always requires a certain amount of time during which the signal level passes through all intermediate values, for example, from 0 volts to 5 volts. Capacitive loads, dielectric losses, noise, and electromagnetic interference caused by cables further manipulate this transition. This results in temporal shifts, the so-called jitter effect, which makes precise reconstruction of the audio signal difficult or almost impossible.
 
To get closer to the pinnacle of audiophile perfection, we also carefully examined the conductor material. Copper in the right purity is itself already an excellent conductor, but a superconductor with no ohmic resistance to the current would be simply perfect. The material’s superconducting properties, however, require extremely low temperatures of at least -70 degrees. Under realistic conditions, silver is currently the most conductive material. With a conductivity of 61.35 S/m (siemens per meter), it outperforms copper by around six percent. Many manufacturers only use silver-plated conductors, which over time can seem “bright”, “metallic” and even, “annoying”. We, on the other hand, use pure silver, which has a far more neutral sound. Due to the higher drift speed of the electrons, our pure silver cable delivers a more penetrating and sumptuous sound performance, across all frequency ranges. On the other hand, silver is about one hundred times more expensive than copper.
 
New 180° USB connector: USB connectors can only be inserted one way. This can be tedious, as the position of USB ports in devices varies. Adjusting the cable's routing often requires significant twisting, which puts strain on the cable, connectors, and sockets, as well as creating an unsightly appearance. Our newly developed USB connectors with a 180° rotation mechanism offer a solution: They can each be rotated +/- 45 degrees, meaning a total rotation of +/- 90 degrees is possible from connector to connector. This is the finishing touch for perfect cabling.
 
The dense shielding of the Reference USB-2405 AIR cable protects the sensitive signal from electromagnetic interference. Beneath the shielding is the innovative Air Helix design, where air and the spacing of the conductors act as insulators, preventing dielectric losses and significantly reducing capacitive loads. Overall, this simplifies the digital-to-analog converter (DAC)'s work and perfects the reconstruction of the audio signal.