Your Roku TV Sounds Great, But It Could Sound Amazing
You just unboxed your new Onn soundbar, ready to transform your movie nights and binge-watching sessions. The sleek design promises a theater-like audio experience right in your living room. But as you look at the array of ports on the back of your Roku TV and the cables that came with the soundbar, a familiar question pops up: how do I make these two devices talk to each other?
This moment of setup confusion is incredibly common. Modern TVs and audio equipment offer multiple connection methods, each with its own pros and cons. The good news is that connecting an Onn soundbar to a Roku TV is a straightforward process you can complete in under ten minutes, often with just a single cable.
This guide will walk you through every possible method, from the simplest one-cable HDMI connection to using optical audio or even Bluetooth. We will cover what to do if the sound does not work immediately, how to configure your Roku TV settings for perfect audio, and answer the most frequent troubleshooting questions. By the end, you will have a fully integrated, powerful sound system without any guesswork.
Understanding Your Connection Options
Before grabbing any cable, it is wise to understand the landscape. Your Onn soundbar and Roku TV likely have several matching ports. The best connection method provides the highest quality audio, supports modern features, and is most reliable. Here is a quick breakdown of the common ports you will find.
HDMI ARC is the gold standard for modern setups. ARC stands for Audio Return Channel. This clever feature allows a single HDMI cable to send audio from your TV to the soundbar and also send video from the soundbar to the TV if the soundbar has passthrough. It enables control of the soundbar volume with your Roku TV remote, a huge convenience.
Optical Audio, also called Toslink, is a digital connection that uses a cable with a square-shaped connector and a red light. It delivers high-quality digital audio but does not support advanced formats like Dolby Atmos and cannot be controlled by your TV remote. It is a solid, reliable fallback.
Finally, there is Bluetooth. Most Onn soundbars and all Roku TVs have Bluetooth capability. This is a wireless connection that requires no cables. While convenient, it can introduce slight audio lag, may compress audio quality, and is generally less stable than a physical wire. It is best used as a temporary solution or for specific scenarios.
Gather Your Tools and Check Ports
The first physical step is a simple inspection. Turn your Roku TV around and look at the HDMI ports. One of them should be labeled “ARC” or “eARC.” This is the port you want. On the back of your Onn soundbar, locate its HDMI OUT port, which is also typically labeled for ARC.
Now, check your box of cables. Your soundbar may have come with an HDMI cable. If not, you will need a standard High-Speed HDMI cable. For the optical method, you need a TOSLINK optical audio cable, which may also have been included. Ensure you have the correct cables before proceeding. Having everything within arm’s reach makes the process smooth.
The Best Method: Connecting via HDMI ARC
This is the method you should use if both your TV and soundbar support it. It offers the best combination of audio quality, feature support, and ease of use.
Power off both your Roku TV and your Onn soundbar. This is a good practice to avoid any potential electrical issues when plugging in cables.
Take your HDMI cable and connect one end to the HDMI ARC port on your Roku TV. Connect the other end to the HDMI OUT port on your Onn soundbar.
Now, power on your soundbar first. Then, power on your Roku TV. The TV should automatically detect the new audio device. Use your Roku TV remote to press the Home button and navigate to Settings.
Within Settings, go to Audio. Then, select Audio Output. Here, you should see an option for “HDMI ARC” or the name of your soundbar. Select it. Your TV audio should now route through the soundbar.
Test the volume. Press the volume up button on your Roku TV remote. The soundbar’s volume should increase, and an on-screen volume indicator from the TV should appear. This confirms the Control via HDMI setting, often called CEC, is working, allowing one remote to control both devices.
What to Do If HDMI ARC Does Not Work
Sometimes, the connection is not seamless. If you have no sound after following the steps above, do not worry. The fix is usually simple.
First, double-check that you used the correct HDMI port on the TV. It must be the one labeled for ARC. Try a different High-Speed HDMI cable if you have one available, as cables can occasionally be faulty.
Next, dive back into your Roku TV Settings. Go to System, then select Control other devices. Find the setting for “System audio control” and ensure it is turned On. This enables the CEC functionality that lets your TV remote control the soundbar volume.
If sound still eludes you, perform a power cycle. Unplug both the TV and the soundbar from the wall outlet for 60 seconds. This clears any temporary glitches in the devices’ memory. Plug them back in and power them on again, checking the Audio Output settings once more.
The Reliable Alternative: Using an Optical Audio Cable
If your TV lacks an HDMI ARC port or you prefer a dedicated audio connection, the optical method is your next best bet. The audio quality is excellent, though you will lose the single-remote convenience.
Again, start with both devices powered off. Locate the optical audio port on your Roku TV. It is a small, square-shaped port often covered by a removable plastic cap. Remove the cap. Find the matching optical input port on your Onn soundbar.
Take the TOSLINK optical cable. You will notice a small plastic flap on one end of the connector; this ensures it only plugs in one way. Gently insert the cable into the TV’s port until it clicks snugly. Do the same on the soundbar side. Avoid bending the cable sharply.
Power on both devices. On your Roku TV, navigate to Settings > Audio > Audio Output. This time, select “Optical” as your output device. The TV will now send a digital audio signal through the cable.
You will now need to use the remote that came with your Onn soundbar to control the volume. The Roku TV remote will only control the TV’s internal speakers, which are now silent. Some soundbars also come with a separate optical mode you must select using its remote or buttons.
Going Wireless: Pairing via Bluetooth
For a completely cable-free setup, Bluetooth is an option. Be aware that this method can sometimes cause a slight delay between the video on screen and the audio, known as lip-sync lag. It is also more susceptible to interference.
Put your Onn soundbar into Bluetooth pairing mode. The process varies by model, but typically you press and hold a Bluetooth button on the soundbar or its remote until a light starts blinking rapidly.
On your Roku TV, press the Home button on your remote and go to Settings. Select Remotes & devices, then choose Bluetooth. Your Roku TV will start scanning for nearby devices.
In the list of available devices, you should see your Onn soundbar appear, often with a model number like “ONN Soundbar.” Select it to initiate pairing. The TV will connect, and the blinking light on the soundbar should become solid.
Once connected, your TV audio will stream to the soundbar. You will control the volume using the Roku TV remote. If you experience audio lag, you may need to adjust the “Audio mode” setting on the soundbar itself or look for an “AV sync” or “Audio delay” setting in your Roku TV’s Audio menu to manually correct the timing.
Configuring Your Roku TV for Optimal Sound
With the physical connection established, a few software tweaks can elevate your audio experience further.
Head back to Settings > Audio. Here, explore the “Audio mode” settings. For most content, “Auto” is a good choice, as it lets the TV select the best format. If you are listening to music, you might try “Music” mode for a wider soundstage. For late-night viewing, “Night” mode compresses loud sounds and boosts quiet dialogue.
Another critical setting is “Volume mode.” If you find commercial breaks are jarringly loud compared to your show, enable “Leveling” to reduce the difference between loud and quiet sounds. The “Off” setting provides the most dynamic, unaltered audio.
If you used an optical or Bluetooth connection and notice the dialogue is hard to hear, check if your Onn soundbar has a dedicated “Dialogue” or “Voice” enhancement feature on its remote. You can also try adjusting the “Speech clarity” setting in the Roku TV Audio menu if available.
Resolving Common Post-Connection Issues
Even with a correct setup, occasional hiccups occur. Here is how to solve the most frequent problems.
No sound from soundbar: Verify the correct Audio Output source is selected on the TV. Ensure the soundbar is not muted and its volume is turned up. Try changing the input source on the soundbar itself using its remote.
TV remote does not control soundbar volume: This is expected for optical connections. For HDMI ARC, ensure “System audio control” is On in the TV settings. Try disabling and re-enabling it. Some soundbars require you to select an “HDMI” or “ARC” input mode.
Audio is out of sync: This is most common with Bluetooth. In Roku TV Settings, go to Audio and look for “AV sync” or “Audio delay.” Use the slider to adjust the timing until the sound matches the actors’ lips. For HDMI, a power cycle of both devices often fixes this.
Sound cuts in and out: This usually indicates a loose cable. Check the connections at both ends. For wireless connections, ensure there are no large metal objects or other electronics causing interference between the TV and soundbar.
Enjoy Your Newly Enhanced Home Theater
Connecting your Onn soundbar to your Roku TV is a simple upgrade that pays off every time you press play. By choosing the right cable and following the specific steps for your preferred method, you have unlocked a richer, fuller audio landscape for everything from dramatic film scores to crisp news commentary.
The key to a hassle-free experience is starting with the recommended HDMI ARC connection for its simplicity and integrated control. Keep the optical method in mind as a reliable backup, and use Bluetooth for quick, temporary wireless listening. Remember to fine-tune the audio settings on both your TV and soundbar to match your content and room.
If you run into a snag, the solution is almost always found in the Settings menu or by reseating a cable. With this setup complete, your focus can now shift from technical setup to finding the perfect content to showcase your powerful new sound. The difference in clarity and immersion will make the minimal effort you just invested immediately worthwhile.
