Connecting a Sonos Arc with HDMI ARC is one of the fastest ways to get premium TV sound without a complicated receiver setup.
This guide explains the physical connection, the TV settings that matter, and the common issues that can prevent audio from working as expected.
What HDMI ARC does for Sonos Arc
HDMI ARC, or Audio Return Channel, lets your TV send sound back to an audio device through the same HDMI cable used for video input.
With Sonos Arc, that means you can route audio from built-in TV apps, cable boxes, game consoles, and streaming devices to the soundbar through one connection.
Sonos Arc is designed to work with TVs that support HDMI ARC or HDMI eARC. eARC is the newer standard and can carry higher-quality formats more reliably, but standard ARC is still widely supported and works well for most setups.
What you need before you start
Before connecting Sonos Arc, confirm that your TV has an HDMI ARC or eARC port.
The port is usually labeled clearly on the TV panel or in the user manual.
- Sonos Arc
- HDMI cable that supports ARC use
- TV with HDMI ARC or eARC
- Sonos app installed on iOS or Android
- TV remote for volume control setup
If your TV does not have HDMI ARC or eARC, Sonos offers alternative connections through optical audio using an adapter, but the HDMI route is preferred for best compatibility and control.
How to connect Sonos Arc with HDMI ARC
Step 1: Identify the correct HDMI port
Find the HDMI port on your TV labeled ARC or eARC.
This is important because the Sonos Arc must connect to that specific port for audio return to work properly.
On many TVs, only one HDMI port supports ARC.
Step 2: Connect the HDMI cable
Plug one end of the HDMI cable into the HDMI ARC/eARC port on your TV and the other end into the HDMI port on the Sonos Arc.
The Arc has a single HDMI port located on the back of the unit.
Make sure the cable is firmly seated at both ends.
A loose connection is one of the most common reasons Sonos Arc does not receive sound.
Step 3: Power on the Sonos Arc
Connect the Sonos Arc to power and wait for the status light to begin flashing.
If this is the first time using the speaker, the Sonos app will guide you through setup.
Step 4: Open the Sonos app
Use the Sonos app to add the Arc to your system.
During setup, the app will detect the speaker and prompt you to connect it to your TV.
Follow the on-screen instructions to complete installation.
Step 5: Enable HDMI ARC in your TV settings
Most TVs require a setting change before ARC will work.
The naming varies by manufacturer, so look for terms such as:
- HDMI ARC
- HDMI CEC
- Anynet+ on Samsung
- Simplink on LG
- Bravia Sync on Sony
- Viera Link on Panasonic
- CEC control or device link
HDMI CEC allows devices to communicate for power and volume control, while ARC handles the audio path.
Both often need to be enabled for a smooth setup.
Step 6: Run the Sonos TV setup
In the Sonos app, complete the TV setup process.
The app may ask you to confirm that you can hear test audio or adjust volume control settings.
This step helps the Arc learn how to respond to your TV remote.
TV settings that matter most
Even when the cable is connected correctly, incorrect TV settings can block audio.
Check these settings if Sonos Arc does not play sound.
Audio output
Set the TV audio output to external speakers, audio system, or HDMI ARC/eARC depending on your TV menu.
If the TV remains set to internal speakers, sound will not route to the Arc.
Digital audio format
When available, set digital audio output to Auto, Pass-Through, or Bitstream.
Some TVs default to PCM, which may reduce surround sound compatibility.
HDMI CEC
Turn on HDMI CEC so your TV remote can adjust Sonos Arc volume.
Without CEC, you may still get sound, but volume control can be limited or unavailable.
eARC setting
If your TV supports eARC, enable it in the settings. eARC can improve compatibility with Dolby Atmos and other high-bandwidth formats, especially with newer televisions and streaming devices.
How to confirm the connection is working
After setup, play content from a TV app or external source and listen for audio through Sonos Arc.
Use your TV remote to increase and decrease the volume to confirm CEC control is active.
You can also check the Sonos app for the current audio format.
Depending on the source and TV support, you may see stereo PCM, Dolby Digital, Dolby Digital Plus, or Dolby Atmos.
- No sound usually points to the wrong HDMI port, disabled ARC, or muted output settings.
- Volume control not working often indicates HDMI CEC is turned off.
- Low-quality audio may mean the TV is converting the signal to PCM instead of passing it through.
Common problems when connecting Sonos Arc with HDMI ARC
Sonos Arc is connected but there is no sound
Check that the TV is using the ARC/eARC port, not a standard HDMI input.
Then confirm that external speakers are enabled in the TV audio menu.
If necessary, unplug both devices from power for 30 seconds and restart them.
TV remote does not control the volume
Most volume issues come from disabled CEC.
Recheck the TV brand’s CEC setting and make sure it is active.
In the Sonos app, rerun the TV remote setup if needed.
Audio cuts out or sounds delayed
Use a certified high-speed HDMI cable and avoid low-quality adapters or splitters.
If the problem continues, disable extra audio processing features on the TV, such as virtual surround or lip-sync enhancements, and test again.
Dolby Atmos is not appearing
Atmos depends on the TV, source device, and streaming app.
Confirm that the TV supports Atmos over ARC or eARC, then check that the content itself includes an Atmos track.
Some apps also require specific subscription tiers or device output settings.
Best practices for a stable Sonos Arc setup
For the most reliable experience, keep the connection as simple as possible.
Use a direct HDMI cable path between the TV and Sonos Arc, avoid unnecessary adapters, and update your TV firmware when available.
- Use the TV’s dedicated ARC or eARC port only
- Enable HDMI CEC and ARC/eARC together
- Choose Auto or Pass-Through for digital audio output
- Keep the Sonos app updated
- Restart the TV and Sonos Arc after major setting changes
If you have multiple sources, let the TV manage the audio return channel rather than connecting devices directly to the soundbar.
This keeps setup simple and preserves remote control compatibility.
When to use eARC instead of ARC
If your TV and Sonos Arc support eARC, it is generally the better option. eARC offers higher bandwidth, better synchronization, and broader support for advanced audio formats.
However, standard ARC remains fully usable for many households and is often enough for streaming apps and cable TV.
The key is matching the connection type to your TV’s capabilities.
If your television only supports ARC, you can still get excellent sound from Sonos Arc without needing a different soundbar or receiver.
How to connect Sonos Arc with HDMI ARC on different TV brands
Menu names vary, but the process is similar across major brands.
Look for the ARC port, enable CEC, then set audio output to external speakers or HDMI ARC.
- Samsung: Enable Anynet+ and select receiver or HDMI audio output.
- LG: Turn on Simplink and set sound output to HDMI ARC or external speaker.
- Sony: Enable Bravia Sync and set the audio system output to HDMI.
- Vizio: Turn on CEC and choose ARC for audio output.
- TCL/Hisense: Enable HDMI CEC and select ARC as the audio destination.
If you are unsure which menu to use, consult the TV manual or manufacturer support page.
The labels differ, but the core steps remain the same.
What to do if your TV only has optical audio
If your television lacks HDMI ARC, you can still use Sonos Arc with the Sonos optical audio adapter.
That setup is more limited than HDMI ARC, especially for remote control and advanced format support, but it can serve as a fallback on older TVs.
For users shopping for a new display, HDMI ARC or eARC should be a priority feature because it simplifies Sonos setup and improves long-term compatibility.