These cables facilitate the easy transmission of digital audio and video signals through one cable. At the receiver end, the signal is again converted to an electrical signal.Ĭoaxial and optical cables have been around for a while, however, HDMI cables were introduced in 2002. The audio signals are converted to optical signals before it reaches the receiver. The audio signals are usually transferred through these fibers. These cables are made of optical fibers, thus the name. Digital coaxial cables only transmit audio signals. These cables theoretically assure superior sounds and great bandwidth. Generally, thicker than regular RCA cables, digital coaxial cables are made of shielded single copper wires, which are similar to the ones that you use to connect your television sets to the cable box. Coaxial cables look similar to a traditional RCA connector, which is often chosen for its durability and rugged construction. They are one of the most common choices for making digital audio connections.
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