In reality, HDMI cables with Ethernet only work with devices that support the technology and usually that would mean plugging a HDMI cable into your router, at which point you might as well just stick with a regular Ethernet cable. Many HDMI cables also include Ethernet, which provides an internet connection in addition to the audio and visual components.Given how many devices that use HDMI cables today also benefit from being connected to the internet, this is extremely handy… in theory. HDMI cables were designed for long distances, and the best cables will support a connection up to 10 meters (32.8 feet) without the use of a repeater, a device that works to extend the signal. Shorter cables can be more flexible, but longer cables, such as those used for in-wall installation, must be firmer to maintain the connection. Various materials are used for the external sheath that extends the length of the cable but these usually consist of various thicknesses of durable PVC plastic. This won't really improve your signal quality, but it will extend the life of your HDMI cable. Gold resists corrosion incredibly well (that’s why it was traditionally used to store wealth) and acts as a protector. High-end HDMI cables coat the pins and external cap with 24-karat gold. On the outside, the standard cable connectors consist of 19 pins. When the copper and silver that are used inside a cable are the highest grade possible, they have less chance of oxidizing or corroding over time. The green tarnishing in copper and the dark gray tarnish in silver that can happen over time would affect the metals' conductivity. Silver and copper are the metals with the highest conductivity properties, but they also corrode when exposed to the atmosphere. Most conductors and the solder used to meld the conductors and connectors together are composed of oxygen-free, high-purity copper, although some use silver as a solder. Both audio and visual components also have an audio return channel, which increases the speed and efficiency of their signals. On the Inside, HDMI cables consist of conductors for both the audio and visual components. Some older technology still uses these older connection ports, so be wary if you’re upgrading some of your devices and not others - a Blu-ray player won’t be able to connect to your 20-year-old SD television without an adapter, and even then you won’t be making the most of the new technology.
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