4K receivers are devices designed to receive and process audio and video signals in the 4K format. 4K, also known as Ultra HD, refers to a resolution of 3840 x 2160 pixels, which is four times the resolution of standard 1080p HD. 4K receivers typically support a range of input and output options, including HDMI, and can upscale lower resolution signals to 4K. They are used in home theater systems and other audiovisual setups to provide high quality audio and video playback. More information
