Europa Ultra Reference M4 is already the fourth generation of the great Ultra Reference analogue interconnect. A new signal quality is enabled by the application of high-performance AML-RCA10-Ag RCA plugs, where a non-magnetic layer of rhodium is the conductor. The XLR version has also been equipped with new AML-XLR20-Ag plugs with enhanced non-magnetic construction in a black finish. In the XLR version connecting surfaces are silver-plated and protected in the passivation process. Moreover, Europa received the antistatic coupler made of POM-C AP50^TM from Acoustic Points, which protects the surface of the cable from micro electrostatic charges. The coupler is mounted with a non-magnetic screw. The conducting base for both versions is eight OCC copper wires (6N - 99,99997% purity). To provide full protection against external influences, Europa is screened with Aluminium foil (100%) and silver plated braid (90%). The changes have initiated a significant redesign of the look and Europa Ultra Reference M4 gained a new face and unique colour.