The fastest way: HDMI with ARC or eARC

Most modern soundbars connect to your TV using a single HDMI cable plugged into the HDMI port labeled ARC or eARC on the back of your TV. This is the simplest route because one cable carries both picture and sound, and your TV sends all audio—from any input, any app, any device—to the soundbar automatically. You do not need to switch inputs or adjust settings once it is connected.

Start by locating the HDMI port on your TV marked ARC or eARC. If your TV manual is not handy, look at the ports on the back or side: they are usually clustered together, and the ARC port is often (but not always) the last one in the row. Plug one end of an HDMI cable into that port and the other end into the HDMI input on your soundbar. Power on both devices. Your TV should recognize the soundbar within a few seconds, and audio will route to it automatically.

If your TV does not have an ARC port, or if you own an older soundbar without HDMI input, use the optical audio cable method instead (see below).

Key Takeaways

  • HDMI ARC or eARC is the single-cable method: plug into the labeled port on your TV, and all audio routes to the soundbar without additional setup.
  • Optical audio cable is the backup for older TVs or soundbars without HDMI, and it works reliably but requires you to turn off the TV speakers manually.
  • Bluetooth is wireless but adds a half-second delay to dialogue and is best used only if wired options are not possible.
  • After connecting, check your TV's audio output settings to confirm the soundbar is selected and the TV speakers are off.
  • If you hear no sound, restart both devices, check that cables are fully seated, and verify the soundbar input is set to the port you plugged into.

Optical audio cable: the reliable backup

If your TV does not have HDMI ARC, or your soundbar lacks an HDMI input, use an optical audio cable (also called a Toslink cable). This thin cable with a square connector carries digital sound from your TV to the soundbar. It is slower to set up than HDMI ARC but works on almost any TV and soundbar made in the last fifteen years.

Locate the optical audio output port on your TV—it is usually on the back panel and labeled "Optical Out" or "Digital Audio Out." The port is a small square opening with a hinged plastic cover. Plug one end of the optical cable into this port and the other end into the optical input on your soundbar. Power on both devices.

After connecting, go to your TV's audio settings (usually under Sound or Audio in the main menu) and set the audio output to Optical. Then turn off the TV speakers so sound comes only from the soundbar. This step is important: if both the TV and soundbar are playing, the sound will be out of sync and confusing.

Bluetooth: wireless but with a catch

Bluetooth is the easiest to set up physically—no cables—but it introduces a half-second delay between what you see on screen and what you hear from the soundbar. This delay is noticeable during dialogue and makes watching TV uncomfortable. Use Bluetooth only if wired options are truly not available.

To connect via Bluetooth, put your soundbar in pairing mode (usually by holding a button on the remote or the soundbar itself for three seconds until a light blinks). Then go to your TV's Bluetooth settings, find the soundbar in the list of available devices, and select it. The two will pair and remember each other for future use.

If you do use Bluetooth, test it with a show or movie first. If the audio lag bothers you, switch to optical or HDMI ARC instead.

Checking your TV's audio output settings

After you plug in the cable, your TV may not automatically send sound to the soundbar. You need to tell it where to send audio. Go to your TV's main menu and look for Sound, Audio, or Speaker settings. The exact path varies by brand—Samsung calls it Sound Output, LG calls it Audio Out, and so on—but the concept is the same.

In that menu, you will see an option for audio output destination. Select the port you plugged the soundbar into (HDMI ARC, Optical, or Bluetooth). Then look for an option to turn off the TV speakers or set them to Off. If you leave the TV speakers on, you will hear audio from both the TV and the soundbar at slightly different times, which sounds wrong.

Save your changes and test by playing something with dialogue. You should hear sound only from the soundbar, and it should match what you see on screen.

What to do if you hear no sound

Start with the simplest fixes. Restart both the TV and soundbar by unplugging them for ten seconds, then plugging them back in. While they restart, check that the cable is fully seated in both the TV and soundbar—a loose connection is the most common cause of no sound.

Next, verify that the soundbar input is set to the correct port. If you plugged into HDMI 1, the soundbar's input selector should be set to HDMI 1 (not HDMI 2 or Optical). Check the soundbar's remote or front panel for an Input or Source button, and cycle through until you see the right one.

Then go back to your TV's audio settings and confirm the soundbar is selected as the output. If the TV still shows TV Speakers as the output, select the soundbar again and save. Finally, check the soundbar's volume—it may be muted or turned all the way down.

If you have tried all of these and still hear nothing, the cable may be faulty. Swap it for a different HDMI or optical cable if you have one available.

Why HDMI ARC is better than optical, and when it matters

HDMI ARC sends audio in both directions: your TV sends sound to the soundbar, but the soundbar can also send commands back to the TV. This two-way conversation means you can control the soundbar volume with your TV remote, and the TV knows when the soundbar is on or off. Optical audio is one-way only—your TV sends sound, but the soundbar cannot talk back—so you must use the soundbar's remote to adjust volume.

If your TV has HDMI ARC or eARC, use it. If not, optical is a solid second choice. The sound quality is identical; the difference is convenience.

Soundbars with multiple input options

Some soundbars have HDMI, optical, and Bluetooth all at once. If yours does, you can connect more than one device. For example, you might plug your TV into HDMI ARC and your gaming console into a second HDMI port. The soundbar will switch between inputs automatically when you switch what you are watching, or you can select the input manually with the soundbar's remote.

Check your soundbar's manual to see which inputs it has. If the manual is lost, look at the back panel: you will see the ports labeled. Most soundbars default to HDMI input, so if you also have an optical cable connected, make sure the soundbar is set to HDMI mode when you want to use the TV.

Frequently Asked Questions

Do I need a special HDMI cable for ARC?

No. Any standard HDMI cable works with ARC. You do not need to buy a cable labeled "ARC" or "Premium." A cable you already have will work fine. The ARC feature is built into the port on your TV and soundbar, not the cable itself.

Can I use both the TV speakers and the soundbar at the same time?

Technically yes, but you should not. If both are playing, the sound will be out of sync because the soundbar has a tiny delay. Turn off the TV speakers in the audio settings so only the soundbar plays.

My soundbar has no HDMI port, only optical. Will it still work?

Yes. Optical audio works just as well as HDMI for sound quality. Plug the optical cable from your TV into the soundbar's optical input, set your TV's audio output to Optical, and turn off the TV speakers. The only difference is you will need the soundbar's remote to change volume instead of using your TV remote.

Why does my soundbar keep disconnecting from Bluetooth?

Bluetooth is less stable than wired connections because it can be interrupted by other wireless devices or physical obstacles. If your soundbar keeps dropping the connection, switch to optical or HDMI ARC instead. If you must use Bluetooth, move the soundbar closer to the TV and away from other wireless devices like routers or cordless phones.

Can I connect a soundbar to a TV that is mounted on the wall?

Yes. Run the cable behind the TV or along the wall to the soundbar. HDMI and optical cables are thin enough to hide behind a mounted TV without much trouble. If you want to avoid cables entirely, use Bluetooth, but remember the audio delay will be noticeable.