With audio connections between individual devices, the cable capacities play a key role. As the signal sources have very low levels and are rather sensitive to high cable capacities, audio cables are perfect candidates to air insulation using the Air Helix technology. For the Referenz NF-1204 Air, we have developed an entirely new and fully solderless RCA-connector design. It comprises several parts that are assembled only during the manufacture process. First, just like with the speaker cable, the highly-pure copper wires of the Cross Link Super Speed waveguide are mechanically stripped from their thin lacquer coating; then, the tellurium-copper connector pin is crimped onto the wire at a 1.5-t pressure. Another innovation is the shield bonding, which is hermetically sealed using a screw.