How to connect Sonos Beam to LG TV
Connecting a Sonos Beam to an LG TV is usually straightforward, but the best method depends on your TV model and the ports available.
The right setup can unlock clearer dialogue, better bass, and automatic TV remote control with very little configuration.
The key is choosing the correct audio output path, then confirming the LG TV is sending sound to the Beam instead of its built-in speakers.
If you want reliable Dolby Digital or Dolby Atmos playback, the details matter.
What you need before you start
Before connecting, check the exact Beam model and the LG TV’s audio ports.
Sonos Beam comes in two versions: Sonos Beam (Gen 1) and Sonos Beam (Gen 2), and both are designed to connect to a TV using HDMI ARC, with optical as a fallback on older setups.
- Sonos Beam soundbar
- LG TV with HDMI ARC or eARC, or an optical audio port
- Included HDMI cable, or Sonos Optical Audio Adapter if needed
- LG remote control for input and sound settings
If your LG TV has HDMI ARC or eARC, that is the preferred connection.
ARC stands for Audio Return Channel, and eARC is Enhanced Audio Return Channel, which supports higher-quality audio formats and more stable communication.
How to connect Sonos Beam to LG TV with HDMI ARC or eARC
This is the best method for most modern LG OLED, NanoCell, QNED, and LED TVs.
It allows audio to travel from the TV back to the Sonos Beam over the same HDMI cable used for control signals.
Step 1: Find the ARC or eARC port
Look at the back or side of the LG TV for an HDMI port labeled ARC or eARC.
On many LG models, only one HDMI port supports this feature, so the label matters.
Step 2: Connect the Beam to the TV
Plug one end of the HDMI cable into the HDMI port on the Sonos Beam and the other end into the LG TV’s ARC or eARC port.
Make sure the cable is fully inserted on both ends.
Step 3: Power on both devices
Turn on the TV and the Sonos Beam.
The soundbar should begin preparing for setup, and the TV may detect a new audio device.
Step 4: Complete setup in the Sonos app
Open the Sonos app on your iPhone, iPad, or Android device and follow the prompts to add the Beam.
During setup, the app will help test audio output and confirm that the TV is sending sound correctly.
Step 5: Change the LG TV sound output
On the LG TV, open the Settings menu, then go to Sound and select Sound Out.
Choose HDMI ARC, HDMI eARC, or External Speaker, depending on the model and firmware version.
Many LG TVs also offer Simplink, LG’s HDMI-CEC feature.
Enable Simplink if it is available, because it allows the TV remote to control the Beam’s volume and power behavior more smoothly.
How to connect Sonos Beam to LG TV with optical audio
If your LG TV does not have ARC or eARC, or if the HDMI ARC connection is unreliable, you can use optical audio.
Sonos includes an optical adapter with many Beam packages, and it remains a practical option for older televisions.
To use optical, connect the adapter to the Beam, then run the optical cable from the adapter to the LG TV’s optical digital audio output.
After that, change the TV’s sound output setting to Optical or External Speaker.
Keep in mind that optical audio supports compressed surround formats, but it does not carry Dolby Atmos in the same way eARC can.
For users focused on basic TV audio, dialogue clarity, and simple setup, optical still works well.
Best LG TV settings for Sonos Beam
Correct TV settings are often the difference between a working setup and a frustrating one.
On LG TVs, the most important settings are HDMI-CEC, audio output format, and speaker selection.
- Simplink: Turn this on so the TV can communicate with Sonos via HDMI-CEC.
- Sound Out: Set this to HDMI ARC, HDMI eARC, or Optical depending on your connection.
- Digital Sound Output: Choose Pass Through if available, or Auto for the most compatible result.
- Internal TV Speakers: Disable them when using the Beam so audio does not play from two sources.
If your LG TV supports Dolby Atmos and the Beam is connected by eARC, pass-through or auto settings can help preserve the best audio format.
However, some apps and channels still output only stereo or Dolby Digital, which is normal.
How to use your LG remote with Sonos Beam
One of the biggest benefits of connecting Sonos Beam to an LG TV is remote control integration.
When HDMI-CEC is enabled through Simplink, your LG remote can usually control volume on the Beam automatically.
If volume control does not work, power-cycle the TV and Beam, then recheck the HDMI ARC connection and Simplink setting.
In some cases, removing and re-adding the TV in the Sonos app helps restore control.
Common problems when connecting Sonos Beam to LG TV
Even a correct setup can run into issues.
Most problems are caused by the wrong HDMI port, disabled CEC features, or mismatched sound settings in the TV menu.
No sound from the Beam?
Confirm the Beam is connected to the LG TV’s ARC or eARC port, not a standard HDMI input.
Then verify that Sound Out is set to the external audio device and that the TV speakers are not still active.
LG remote does not control volume?
Check that Simplink is enabled on the TV.
If it is already on, unplug both the TV and Beam from power for about 30 seconds, then reconnect them and test again.
Audio is delayed?
Audio delay can happen when the TV applies extra processing.
Try changing the LG audio format to Pass Through or reducing sound enhancement features such as AI Sound Pro or other post-processing options.
Dolby Atmos is not showing?
Dolby Atmos requires compatible content, a supported LG TV, and usually an eARC connection.
If you are using optical, Atmos will not pass through in the same way.
Also check that the streaming app itself supports Atmos for that title.
How to connect Sonos Beam to LG TV without HDMI ARC
If your LG TV is older and lacks ARC, your options are more limited but still workable.
Optical audio is the primary solution, and it can deliver stable stereo or compressed surround sound without needing a TV upgrade.
Another possibility is using an HDMI audio extractor, but that adds complexity and is only worth considering if you already understand home theater signal routing.
For most users, the Sonos optical adapter is the cleaner path.
When to update firmware and restart devices
Software updates can affect compatibility between LG webOS and Sonos devices.
If the Beam is not detected or audio suddenly stops working after a TV update, check for updates on both devices.
- Update the LG TV through Settings > Support > Software Update
- Update the Sonos app and Beam firmware through the Sonos app
- Restart the TV, Beam, and router if setup changes do not take effect
Firmware updates often improve HDMI handshakes, CEC behavior, and audio format support.
This is especially important on LG OLED and QNED models, where features can vary by year and region.
Best practices for reliable Sonos Beam and LG TV audio
For the most stable experience, use the HDMI ARC or eARC port, keep Simplink enabled, and set the LG TV’s sound output to the external speaker mode that matches your connection.
Avoid unnecessary audio processing unless you specifically prefer it.
If you switch between TV speakers and the Beam regularly, remember that the TV may retain the last output setting.
Checking Sound Out after major updates or after a power outage can save time later.