Like many audio, video, and data cables, HDMI cords can suffer from signal degradation at longer lengths—50 feet is generally considered the maximum reliable length. And it’s rare to see an HDMI cable longer than 25 feet in a store.
Does the length of HDMI cable affect quality?
What is the maximum length of HDMI cable?
TLDR: Most standard high-quality HDMI cables have a maximum length of 50 feet. Using an HDMI Signal Booster will let you daisy-chain HDMI cables together, but not without drawbacks. Alternatively, using an Ethernet to HDMI extender will send HDMI signals up to 300 feet.
What happens if HDMI cable is too long?
Since HDMI is a fully digital signal, there is no way to signal to be of lesser quality than any other cable. The only thing that happens is signal drop-off when sending high bandwidth signals over a too-long cable or a cable that isn’t rated for the specific HDMI standard.