Are expensive HDMI cables worth it? Yes and no. Below around 2m length no it is unlikely to make any difference. At longer lengths yes, but not because fancy pansy "high quality" cables are better and will make the picture or sound better, but because the cable needs to be compliant with the HDMI specifications and have been tested to […]

HDMI Cables The video and audio data channels of an HDMI cable are capable of traveling over long distances.  The DDC (Display Data Channel I2C bis) limits the cable length of HDMI cables.  According to an expert who tests cables for compliance, going above 18m even with the best cables requires active repeating of the DDC connection.