What is the maximum distance before signal degradation occurs with HDMI connections?

The maximum distance before signal degradation occurs with HDMI connections is typically around 15 meters under normal conditions. HDMI cables can transmit high-definition video and audio signals, but the quality of the signal can diminish due to factors such as cable quality, interference, and the environment in which they are used.

While it is technically possible to achieve longer distances—up to 25 meters or more—through the use of high-quality cables or signal boosters, serving as an intermediary connection, the standard recommendation remains around 15 meters for reliable performance. Beyond this length, users may begin to experience noticeable degradation in signal quality, such as reduced video resolution, loss of audio, or complete signal dropouts.

The choice of 20 meters is somewhat optimistic in general usage, as it does not consider the variations in installation environments or the quality of the HDMI cables being used. While there may be some exceptional scenarios where a signal can be transmitted effectively up to that distance, relying on such lengths risks compromising the integrity of the signal in most everyday applications.