If you are going use in-wall speakers, make sure the wire is rated for in-wall installation. In-wall speaker wire is rated by its gauge (thickness) and strands (conductors), for example: 16/2 is 16-gauage wire with 2 conductors, and 14/4 is 14-gauge wire with 4 conductors. For shorter runs, less than 50 feet use 16-gauge wire, and for longer runs use 14-gauge wire. After you have decided where to route your wire, you’ll need a wiring map that includes all of the speakers, cables, brackets, and any other items you will be installing.
To pass 4K or HDR video over long distances, it’s important for you to consider your options. 4K video resolution is nearly 8.3 megapixels. That is a ton of data to move down a wire! If you want smoother 4K resolutions at 60Hz (60p or 60 fps), you must have the right solution. That said HDMI sources and destination devices should be no more than 15 feet apart for the best results. Things like high-speed fiber optic HDMI cable, network cable, baluns, and 4K Ultra HD base extenders offer ways to pass audio and video signals over long distances.