Learning how to set up Sonos Arc is straightforward, but the best results depend on a few key settings.
This guide walks through placement, wiring, app setup, and troubleshooting so you can get proper Dolby Atmos sound without guesswork.
What You Need Before You Start
Before you begin, confirm that your TV and home network are ready for Sonos Arc.
A smooth setup usually depends on having the right port, the right cable, and the Sonos app installed on a compatible phone or tablet.
- Sonos Arc soundbar
- TV with HDMI eARC or HDMI ARC
- Included HDMI cable or a certified high-speed HDMI cable
- Stable Wi-Fi network
- Sonos app for iOS or Android
- Power outlet near the TV stand or wall mount area
If your television has an optical-only output, Sonos Arc will not connect directly without additional Sonos-supported hardware, so check the ports first.
For the best home theater experience, HDMI eARC is preferred because it supports higher-quality audio formats and easier control integration.
Where Should You Place Sonos Arc?
Placement matters because Sonos Arc is designed as a front-facing soundbar with upward-firing drivers for spatial audio.
Put it centered under your TV, ideally with enough open space above it so the sound can reflect properly from the ceiling.
Keep these placement guidelines in mind:
- Place the Arc directly below the TV and centered with the screen.
- Do not block the top surface or front grille.
- Leave some clearance above the soundbar for upward-firing speakers.
- Avoid enclosing it inside a cabinet unless the space is specifically open at the front and top.
- If wall-mounting, use a Sonos Arc wall mount or a compatible solution that keeps the soundbar level and clear of obstructions.
Good placement can noticeably improve dialogue clarity, soundstage width, and Dolby Atmos height effects.
Even a perfectly configured system can sound underwhelming if it is cramped into a tight media cabinet.
How to Set Up Sonos Arc with Your TV
The core setup is the same for most homes: power the soundbar, connect it to the TV with HDMI, then complete setup in the Sonos app.
The process generally takes only a few minutes if your TV supports ARC or eARC.
1. Connect the power cable
Plug Sonos Arc into a power outlet and make sure the status light turns on.
Wait until the soundbar finishes starting up before continuing.
2. Connect HDMI to the TV
Use the included HDMI cable to connect Sonos Arc to the TV’s HDMI ARC or HDMI eARC port.
On many televisions, this port is labeled clearly; if it is not, check the manual or the back-panel markings.
Do not connect the soundbar to a regular HDMI input.
Sonos Arc must connect to the ARC or eARC port for TV audio to return to the soundbar.
3. Select the correct TV audio output
Open your TV settings and choose the HDMI ARC or eARC output as the audio destination.
You may also need to enable HDMI-CEC, which lets the TV and soundbar communicate for volume and power control.
Different brands use different names for this feature, such as:
- Samsung: Anynet+
- LG: Simplink
- Sony: BRAVIA Sync
- Vizio: CEC
- Roku TV: System Audio Control
If your TV supports eARC, enable it in the settings for better compatibility with advanced audio formats.
How to Add Sonos Arc in the Sonos App
After the hardware connection is complete, use the Sonos app to register the product and finish configuration.
The app is essential because it manages room assignment, updates, TV setup, and optional features such as Trueplay tuning.
1. Install or open the Sonos app
Download the Sonos app from the App Store or Google Play if you do not already have it.
Sign in to your Sonos account or create one if needed.
2. Add a new product
From the app, choose the option to add a new device.
The app should detect Sonos Arc automatically when it is powered and connected.
3. Follow the TV setup prompts
The app will guide you through confirming the HDMI connection, testing audio, and pairing the soundbar with your television.
This step may include adjusting TV remote control settings so you can use one remote for volume and mute.
4. Name the room
Assign the soundbar to a room, such as Living Room or Family Room.
Room naming helps if you later add other Sonos speakers or a subwoofer.
How to Configure Dolby Atmos and TV Sound Settings
Sonos Arc supports Dolby Atmos when paired with a compatible TV and source device.
However, Atmos depends on the signal path, so it is important to verify every device in the chain.
To improve compatibility:
- Use a TV with HDMI eARC for the best chance of receiving Dolby Atmos.
- Set the TV audio output to pass-through if available.
- Make sure the source device, such as a streaming box or game console, outputs Dolby Digital Plus or Dolby Atmos where supported.
- Check streaming app settings on devices like Apple TV 4K, Amazon Fire TV, Roku, or Xbox.
If you are using internal TV apps like Netflix, Disney+, or Max, the TV itself must support Atmos passthrough properly.
If it does not, you may still get surround sound, but not the full Atmos experience.
How to Run Trueplay Tuning
Trueplay is Sonos room calibration that helps the Arc adapt to your room’s acoustics.
It is especially useful if your room has hard floors, large windows, or irregular furniture placement.
After setup, open the Sonos app and follow the Trueplay instructions.
The process typically uses a compatible iPhone or iPad and asks you to move around the room while the system measures reflections and speaker response.
Trueplay can improve balance, dialogue intelligibility, and bass integration, particularly in rooms where furniture or wall materials affect sound.
If you add a Sonos Sub or rear surrounds later, rerun Trueplay for the updated system.
How to Connect Sonos Arc to Other Sonos Speakers
Sonos Arc can be expanded into a more complete home theater system with wireless surrounds and a Sonos Sub or Sub Mini, depending on your preferences.
This is optional, but it can significantly improve immersion for movies and games.
- Sonos Sub for deeper bass and more impact
- Sonos Sub Mini for smaller spaces and lighter bass reinforcement
- Sonos One, Era 100, or similar rear speakers for surround channels
In the Sonos app, you can add surrounds or a sub through the room settings for the Arc.
Once paired, the system treats them as a single home theater setup, which simplifies everyday use.
Common Sonos Arc Setup Problems and Fixes
Even with a simple setup, some TVs and audio systems need a little adjustment.
Most problems relate to HDMI handshakes, TV settings, or network stability rather than the soundbar itself.
No sound from the TV?
- Confirm the cable is in the TV’s ARC or eARC port.
- Make sure TV speakers are disabled or set to external audio.
- Check that HDMI-CEC is enabled.
- Power-cycle the TV, soundbar, and source device.
The Sonos app cannot find Arc?
- Verify the soundbar is plugged into power.
- Make sure your phone is on the same Wi-Fi network you want Sonos to use.
- Restart the app and try again.
- Check whether your router has guest network isolation or similar restrictions.
Volume control is not working?
- Re-run the TV remote setup in the Sonos app.
- Make sure CEC is active on the TV.
- Try a different remote profile if the app offers one.
Dolby Atmos is not showing?
- Confirm your TV supports Atmos passthrough.
- Use an eARC port if available.
- Check the audio format in the streaming app or source device.
- Use a high-quality HDMI cable and avoid unnecessary adapters.
Settings Worth Checking After Setup
Once you finish how to set up Sonos Arc, spend a few minutes reviewing the audio settings that affect daily use.
Small changes here can make a noticeable difference.
- Speech enhancement for clearer dialogue
- Night mode to reduce loud effects at lower volumes
- TV audio delay settings if lip sync seems off
- EQ adjustments for bass, treble, and loudness balance
If you stream a lot of movies, try listening to a few scenes with dialog, action, and music to confirm everything sounds balanced.
For gaming, check whether your console is set to send the highest compatible surround or Atmos signal.
When to Update Sonos Arc
Sonos regularly releases firmware updates that improve compatibility, stability, and audio performance.
After your initial setup, keep automatic updates enabled or check periodically in the app.
Updating is particularly important if you add a new TV, streaming device, or surround speakers later.
Firmware updates often address HDMI handshake issues, app features, and support for new audio formats.
With the right TV settings, proper placement, and a quick calibration pass, Sonos Arc can become a reliable centerpiece for TV audio, music playback, and immersive home theater sound.