Contributor I

Answered

Sonos Arc - Requirements HDMI Cable for S/PDIF Adapter

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What are the requirements of a HDMI cable that is used to connect Sonos Arc (HDMI Port - i suggest eARC HDMI 2.1) with a Beamer (S/PDIF Port) through the Sonos optical Adapter?

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controlavAnswer

Lead Maestro

Pretty much any HDMI cable, it is trivial to pass a DD 5.1 signal over any HDMI cable. Is there something wrong with the one that comes with the Beam for you?

Author of the leading independent Sonos apps for Android, MacOS, iOS, Windows and Xbox.

controlavAnswer

Lead Maestro

Pretty much any HDMI cable, it is trivial to pass a DD 5.1 signal over any HDMI cable. Is there something wrong with the one that comes with the Beam for you?

Author of the leading independent Sonos apps for Android, MacOS, iOS, Windows and Xbox.

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chasperAuthor

Contributor I

Yeah I need a 15m long one and every cable I have testet in this length didn’t worked or had strange fractured sound.

so the last one was also glassfiber and should have been pretty good, but same effect.

James L.

Retired Community Staff

Yeah I need a 15m long one and every cable I have testet in this length didn’t worked or had strange fractured sound.

so the last one was also glassfiber and should have been pretty good, but same effect.

Hi @chasper,

Most manufacturers don’t recommend using HDMI cables over 20ft (~6m) without some form of signal booster, such as an “active” HDMI cable. You’re likely to experience strange artifacting and dropouts by using a passive HDMI cable of this length, and this problem isn’t exclusive to Sonos products. I’ve found this article that explains it in a bit more detail, as well as alternatives to work around this issue.

Mark good posts by pressing the like button, and select the best answer on questions you've asked to help others find solutions.

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chasperAuthor

Contributor I

Many thanks for your response.

I dont think this is also appliable to a ethernet hdmi with glassfiber which is build for up to 100m distance.
It is also mentioned in the article, that therefore the max distance is much higher (up to 300m)

buzz

Grand Maestro

The fiber cable must support HDMI-ARC.

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chasperAuthor

Contributor I

Yeah It supported HDMI-ARC. Are there any other requirements?

Propably HDMI Version 2.1 or something?

buzz

Grand Maestro

In this application bandwidth is not much of a consideration. As long as there is an explicit statement that the cable supports HDMI-ARC the cable should be OK.

How does the cable get it’s power? There could be a power issue. As a quick test, can the fiber cable support another HDMI path -- such as the cable box, ROKU, AppleTV, etc. connection to the TV?

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chasperAuthor

Contributor I

yeah I will try this one, thanks for the hint :)

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chasperAuthor

Contributor I

So, the cable worked on a PC setup.
I therefore also assume that it is a power issue.

Does anyone know how to work around the problem without great cost?
Could a cheap HDMI repeater be enough?
Due to the required Sonos optical adapter I do not know if a pure repeater will suffice....

Ken_Griffiths

There are these kind of extenders on Amazon, but it’s not a cheap option (sorry 🤷‍♂️) …and I personally couldn’t say how well they may work for your chosen setup, but maybe worth considering perhaps, keeping in mind the distance you’re trying to achieve. The setup caters for S/PDIF connections too.

https://www.amazon.co.uk/HDMI-Extender-ARC-60Hz-Bi-Directional/dp/B08QTQYK6S

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