profile.country.DE.title
Peter_S.
Genius
5,353  Views

What is ARC?
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The ARC feature eliminates the need to use an additional composite audio cable or an optical cable when connecting an Audio/Video (A/V) receiver or surround sound system to a TV. Connecting an HDMI cable from an ARC-compatible A/V receiver to an ARC-compatible TV will allow the following:

  1. Send audio to the A/V receiver from the TV.
  2. View and listen to movies and other content from source devices as they are passed through the A/V receiver to view on the TV.

The following image displays the connections required to get sound from a TV that is ARC compatible to an audio unit that is also ARC compatible:

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[A]: TV
[B]: Audio system
[C]: HDMI ARC input on the TV
[D]: HDMI ARC output on the Audio system
[E]: HDMI cable (high quality, high-speed HDMI cable)

NOTE: Low quality HDMI cables that are not labeled high-speed will not be able to provide the ARC function.

The following image displays the connections required to get sound from a TV to a home audio device when either of the units are not ARC compatible:

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How to
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Troubleshootings
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1 Comment
profile.country.GB.title
89se7en
New

I have a month old KD65XG9505 with a brand new Harmon Kardon SB20 soundbar connected via the ARC HDMI port. I have Sky Q and a Sony BluRay player connected via 2 of the normal HDMI ports.

Sound is great, but when I leave the TV and Soundbar on standby (Sky Q and Bluray both also on standby), the soundbar is powering itself up without any intervention, ie overnight. 

When I connect the soundbar via optical, it stays in standby mode. I suspect therefore that the TV is sending some sort of keep awake or handshake to the soundbar. Anyone got any ideas?

I wouldn't worry too much about this, but my previous Canton DM50 soundbar started turning itself off and on spuriously soon after I installed the XG9505 in my house (hence the brand new SD20).