HDMI ARC and eARC Cable: What You Need to Know

ARC and eARC basics

Audio Return Channel (ARC) and enhanced Audio Return Channel (eARC) let your TV send audio back to a soundbar over the same HDMI cable that carries video from the soundbar to the TV. This eliminates the need for a separate optical cable and simplifies the connection. The difference between the two is bandwidth: eARC supports higher-quality audio formats, but both use the same physical HDMI connector.

If you are deciding between the two, read our guide on HDMI ARC vs eARC for a full breakdown. For most soundbars, the cable that already came with your streaming box or game console will work for ARC. For eARC, you may need to upgrade to a cable that supports the higher data rate.

The key is that the cable must be able to carry the audio data without errors. An HDMI cable that meets the certification standards for its speed category will do the job.

HDMI cable categories

The HDMI Licensing Administrator publishes a cable guide and a certification program. Cables are grouped by speed: Standard, High Speed, and Premium High Speed. Each category is designed for certain bandwidths, and the packaging carries a logo that tells you which category the cable belongs to. This is similar to how Bluetooth audio versions have their own rating system.

Standard HDMI cables support basic video and audio, which is enough for ARC but may not be reliable for eARC. High Speed cables are meant for 1080p and 4K video, and they also handle ARC comfortably. Premium High Speed cables are certified for 4K with high dynamic range and higher frame rates, which makes them a safe choice for eARC.

The HDMI 2.2 specification, announced in 2025, introduces even higher bandwidth (96Gbps), but this is far above what home audio needs. For ARC and eARC, a Premium High Speed cable is more than sufficient.

Ethernet over HDMI

Some HDMI cables include an Ethernet channel. This lets the cable carry network data alongside video and audio, so your TV and soundbar can share an internet connection without a separate cable. The Ethernet channel is not required for ARC or eARC to function, but it can be useful if you have a smart TV that needs a wired network connection and you want to keep the cable count low.

If you see the Ethernet logo on the cable packaging, the cable supports this feature. It does not affect audio return quality, so you can ignore it unless you plan to use the network function.

For a soundbar, the Ethernet channel is rarely essential. Most soundbars connect to the network over Wi-Fi, and the TV usually handles streaming duties. So treat this as a nice-to-have, not a must. If you are weighing wired vs wireless, see our article on soundbar Ethernet vs Wi-Fi.

How to check if your cable is suitable

Look for the official HDMI logo on the cable or its packaging. The logo indicates that the cable has been tested and certified by the HDMI Forum. The certification also tells you the speed category, usually printed as "High Speed", "Premium High Speed", or "Ultra High Speed".

If the cable came with a soundbar or TV, it is almost certainly rated for the required bandwidth. If you are using an older cable that has been sitting in a drawer, check for the logo. A cable without any logo may still work, but it is not guaranteed to carry eARC reliably.

You can also test your connection by playing a movie with a high-bitrate soundtrack and listening for dropouts or stutter. If audio cuts out, try a different cable or a shorter one. For more on setup, see our guide on soundbar HDMI connections.

• Check for the HDMI logo on the cable jacket.
• Read the label to see if it says "High Speed" or "Premium High Speed".
• Prefer cables that are certified, not just "compatible".
• Keep the cable under 6 feet if possible for eARC.

Cable length and quality

Longer HDMI cables are more likely to degrade the signal, especially at the higher bandwidths used by eARC. A 10-foot cable is usually fine, but 20-foot and longer runs can introduce errors. For a soundbar mounted directly under a TV, a 3-foot cable is all you need.

Avoid using HDMI adapters or couplers if you can. Each connection adds a potential point of failure. If you must extend a cable, use a cable that is already long enough, not an adapter.

Quality matters more than price. A cheap cable that is certified will outperform an expensive one that is not. The certification logo is your best guide. For more on cabling and installation, see our article on soundbar cable management.

What to pick for your soundbar

For most soundbars, the included cable will work for both ARC and eARC. If you are buying a cable, choose a Premium High Speed or Ultra High Speed certified cable. This covers all current and future needs.

If your soundbar only supports ARC (and not eARC), a standard High Speed cable is sufficient. But since the price difference is small, it is worth getting a higher-spec cable to future-proof your setup.

Connect the cable to the HDMI port labeled "ARC" or "eARC" on your TV, and the corresponding port on the soundbar. Then tell the TV to use the external speakers. For step-by-step setup, see our guide on soundbar HDMI connections.

• Use the correct HDMI port on both devices.
• Enable eARC in the TV settings if your soundbar supports it.
• If audio drops, try a shorter cable.

What to pick for your setup

Questions

Can any HDMI cable work for ARC?

Yes, ARC works with most standard HDMI cables because it uses a relatively low bandwidth. A certified High Speed cable will definitely work. For more details, read about HDMI ARC soundbars.

Do I need a special cable for eARC?

eARC can work with a High Speed cable, but for guaranteed performance, use a Premium High Speed or Ultra High Speed certified cable. The higher bandwidth leaves room for the best audio formats.

Does the Ethernet feature on HDMI cable matter for audio?

No. The Ethernet channel is separate from audio. It is only useful if you need to share a network connection between devices, which is rarely needed for a soundbar.

How long can an HDMI cable be for eARC?

Keep it under 10 feet to avoid signal degradation. For longer runs, consider a cable with built-in signal boosting or active electronics.

Can I use an HDMI adapter to make a shorter cable fit?

Adapters can introduce signal loss. It is better to buy a cable that is the correct length rather than use an adapter.