What is the longest recommended HDMI cable
HDMI cable: what length is allowed and how can it be extended?
Sometimes it depends on the length. Especially with HDMI cables. In the following, we will introduce you to the various options for HDMI extension.
HDMI cable length: what is the limit?
According to the HDMI Licensing Organization, up to 10 meters in length can be easily achieved with a high-quality 10m HDMI cable without the signal having to be amplified. For everything that goes beyond that, the signal in the HDMI cable must theoretically be amplified with a separate solution. Special HDMI repeaters are suitable for this. Whether or not signal amplification is necessary in practice depends largely on the components used - in particular the HDMI receiver chip built into your television. The better it is and the more functions it supports (e.g. cable equalization), the more likely the receiver chip can process weak signals. In other words: What works with your current television does not necessarily have to work just as well with another device.
Is there a loss of quality from 10 meters?
Problems can arise if the length of an HDMI cable is longer than the 10 meters recommended by the HDMI organization. Don't worry: "Creeping" or subliminal quality losses, as with analog signals in the past, are not possible with HDMI. Thanks to the digital TMDS technology on which all HDMI cables are based, picture and sound are either transmitted crystal clear or there are obvious errors such as a total failure.
HDMI length up to 10m - The quick solution with an extension cable
If you already have a short HDMI cable (usually less than 5m) in use and just want to extend it by another short piece, an HDMI extension cable is recommended. In this way, several HDMI cables can be plugged together and the desired length can be achieved quickly. With a extension cable you can "plug together" HDMI cables up to a total length of 10m. Everything else can work, but depends on the individual case and the components used.
HDMI extension cable without signal amplification (up to 10m)
Alternative tip: A single 10m HDMI cable is about as much and is less prone to interference than two HDMI cables plugged together.
HDMI extension up to 40m: An HDMI repeater is needed
If you want to bridge more than 10 meters, the signal in the cable must be amplified. The use of an HDMI repeater for HDMI extension is recommended for this.
Simple HDMI repeater with signal amplification (up to 40m)
A Repeater connects two HDMI cables with each other and amplifies the signal so that it arrives at the signal receiver without loss. The HDMI cables connected to the repeater should not be longer than 10m. The HDMI repeater usually does not require a separate power source. In our experience, by combining several HDMI repeaters and HDMI cables, chains ofup to 40 meters can be achieved. Make sure that the input and output ports on the repeater are correctly wired - otherwise there is nothing with amplification.
If, in extreme cases, you need a cable length of more than 40m, an HDMI repeater will also reach its limits. For this you need a so-called Cat. 5/6 extenders. For this purpose, the technology of network cables (Cat. 5/6) is used, which transport the HDMI signal. In this way, lengths of up to 300 meters can be achieved.
Long length - high risk? Reduction of sources of risk
With an HDMI cable length of a maximum of two to ten meters, any well-made high-speed cable is suitable.
However, if you want to bridge a greater range via HDMI, you should pay attention to high-quality components that offer as little signal resistance as possible. This applies in particular to the HDMI cables used between repeaters and the HDMI extension cable.
In any case, you should use HDMI cables that comply with the HDMI high-speed standard. Since cable version 1.3, the HDMI organization has defined precise cable properties with regard to attenuation, signal propagation time differences, crosstalk, etc. With a high-speed cable you are therefore on the safe side.
With two HDMI high-speed cables and a good repeater, cable connections of up to 20 meters can be achieved easily and inexpensively. That should be enough for most users. If you need even more length, HDMI repeaters and cables can be combined. In case of doubt: try it out. If your video and audio signal arrives at the signal receiver, everything is fine. There is no subliminal loss of quality with an HDMI extension.
If a length of 10 meters is sufficient, we recommend a one-piece 10m HDMI cable - this solution is inexpensive, low-interference and optically inconspicuous. In general, the longer the cable connection, the higher the risk of signal loss and the more recommendable a high-quality HDMI cable with low signal resistance.
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