What device is used to drive video, computer graphics, and stereo audio over extended distances?

The device that is primarily used to drive video, computer graphics, and stereo audio over extended distances is a line driver. Line drivers are specifically designed to send signals over longer cable runs while maintaining signal integrity. They amplify the signal, ensuring that it remains strong enough to overcome any potential losses that occur during transmission, which is crucial for high-quality video and audio performance.

Line drivers are particularly beneficial in AV environments where presentations or broadcasts may require signals to be run from a source device to a display or speakers that are located far apart. By using a line driver, one can ensure that the transmitted signals do not degrade, thereby preserving the quality of the audio and video output.

In contrast, signal processors typically modify or enhance the audio and video signals but are not primarily built for long-distance transmission. Transceivers can send and receive signals but are more commonly used for data communication rather than AV signal transmission over long distances. A/B switches allow users to select between different inputs or outputs but do not themselves amplify or drive signals over long distances. This clarifies why a line driver is the correct choice for this application.