Which of the following cables is primarily used to connect audiovisual equipment for highest quality signals?

The cable that is primarily used to connect audiovisual equipment for the highest quality signals is the HDMI cable. HDMI, which stands for High-Definition Multimedia Interface, supports both high-definition video and digital audio in a single cable. This capability makes it ideal for transmitting high-quality signals without loss of quality, which is often crucial in professional audio and video setups.

HDMI can carry uncompressed video and audio signals, which allows for the best clarity and fidelity in the final output. Additionally, HDMI cables can support various resolutions, including 4K and 8K, as well as surround sound formats, further cementing their role as the go-to choice for high-quality audiovisual connections.

Other types of cables, while useful in specific contexts, do not match the versatility and quality capability of HDMI. For example, RCA cables are more common for analog connections and may not support high-definition video. XLR cables are excellent for audio and are commonly used in professional sound systems but do not transmit video. BNC cables are typically used for video signals in broadcast scenarios but are not designed to carry audio, limiting their utility in comprehensive AV setups. Thus, for the highest quality signal across audio and video, HDMI cables are the clear choice.