eARC is the HDMI connection that sends high-quality audio from your TV to a soundbar or AV receiver.
If you want full-quality sound formats like Dolby Atmos, or the simplest setup possible, this is worth knowing about.
What eARC Is
eARC stands for Enhanced Audio Return Channel. It is a feature of certain HDMI ports on a TV, built on HDMI 2.1 standards and also found on some HDMI 2.0 TVs.
It lets your TV send audio back out over the same HDMI cable that your soundbar or receiver uses. That way, apps running on the TV, like streaming services, can send sound to your speakers without a separate audio cable.
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How eARC Differs From ARC
Standard ARC carries compressed audio. It handles common surround formats like Dolby Digital, but it can’t carry the highest-quality formats.
eARC has far more bandwidth, so it can carry uncompressed and lossless audio and object-based formats like Dolby Atmos in high quality.
For basic stereo, ARC is fine. For high-end surround, eARC matters. Our Dolby Atmos explainer shows where it helps.
What You Need to Use It
You need an HDMI port labeled eARC on the TV (often HDMI 3 or a specific port), a soundbar or receiver that supports eARC, and an HDMI cable that can carry the signal.
Most Ultra High Speed HDMI cables work; see HDMI cables explained. You may also need to enable eARC or HDMI-CEC in your TV and soundbar menus.
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eARC and AV Receivers
An AV receiver sits between your sources and your TV, handling video and audio for your speakers. With eARC, the receiver can receive audio from the TV’s built-in apps and still output video to the screen.
When choosing a receiver, check how many HDMI inputs and outputs it has, whether it supports eARC, and what channel count it supports. This matters if you plan to expand; see our home theater budget guide and 5.1 vs 7.1 audio systems.
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Troubleshooting eARC
If you hear no sound or only stereo, make sure the cable is in the eARC-labeled port, update the firmware on your TV and soundbar, and set the TV’s audio output to eARC or Auto.
Power-cycle the devices if the connection will not establish. If audio and video are out of step, see why TV audio is out of sync. For setup steps, see how to connect a soundbar to any TV.
Frequently Asked Questions
Do I need eARC?
If you use a soundbar or receiver and want the best audio quality, especially Atmos, yes. For basic stereo or standard surround, regular ARC is usually enough.
Is eARC backward compatible with ARC?
Yes. eARC devices work with ARC devices, but you only get ARC features if one side lacks eARC.
Do I need a special HDMI cable for eARC?
Use a high-quality HDMI cable, ideally Ultra High Speed. Many existing cables work, but certified cables are the safest choice.
Which HDMI port is eARC?
It is labeled on the TV, often HDMI 2 or 3. Check the label or the manual.
Can I use optical instead of eARC?
Yes, but optical cannot carry the highest-quality audio formats, including Dolby Atmos in its full form.
