The Kordz R.4 48Gbps Rack and Marine Passive HDMI Cable is a passive copper HDMI cable designed for short-length, high-bandwidth runs commonly found in racks and local device interconnects. It requires no external power and supports the full HDMI 2.1 feature set within the 48Gbps bandwidth profile. Active and optical solutions offer longer distance capability but introduce electronics that ultimately cannot match the absolute reliability of a passive cable. The Kordz R.4 48Gbps Rack and Marine Passive HDMI Cable provides a robust alternative where passive performance, mechanical stability and installation efficiency are priorities.