First Patent For the Die Hard series, we have developed an innovative system of connectors that increment contact surface area between male and female connectors and minimize oxidation of metallic parts. In XLR connectors, the problem is particularly piquant, given that electrical contact is trusted to 3 tiny pins, which must have excellent mechanical stability. In the case of our cables, the male and female cylinders are built with an internal, spring-like, brass sleeve that "grips" the connector to which it is coupled and assures firm mechanical contact - even when subjected extremely dynamic cable movement The physical connection obtained by the junction of the male and female connectors in a standard XLR connector is located outside of the shielding, leaving this area susceptible to external EM interference, completely compromising the shielding of entire system. The solution lies in somehow enclosing this connection inside the grounded shielding. The internal, brass coupling sleeve in the Die Hard series connectors, as it is connected to the screen, serves this function as well, completely shielding the signal-carrying conductors against external electromagnetic fields. Furthermore, gold plating insures excellent electrical contact of all conductors.

Second Patent A similar concept is applied to the RCA connectors in the series. Normally, the mechanical stability of this type of connector is entrusted to the outer sleeve, while the central pin is inserted into the ring contact inside the female connector. With time and use, the internal ring of the female and external sleeve of the male expand, heavily compromising the stability of the electrical connection, causing false or intermittent contact. In the Die Hard RCA connectors, however, the external sleeve of the male connector has a truncated conical form that clutches onto the external contact of the female. Additionally, the central pin is constructed with a leaf-spring style tab that exerts continuous pressure against the internal ring contact of the female. This guarantees constant, reliable contact and signal transmission. Optimum mechanical stability and ample contact surface, though important steps ahead in respect to previously available connectors are still not enough. It is not sufficient to guarantee stable physical contact if this become more and more negated over time by the effects of oxidation on the contact materials. Only Gold, the metal least susceptible to oxidation, could be the perfect companion to Die Hard. Every contact surface of the male and female XLR is 24 Karat Gold plated to insure perfect contact for years.