The three ways to connect: HDMI, optical, or Bluetooth

A sound bar connects to your TV through one of three methods, and which one works depends on what ports your TV and sound bar have. HDMI is the fastest and best choice if both devices support it — it carries picture and sound through one cable and often lets the sound bar control your TV's volume with your remote. Optical (also called TOSLINK or S/PDIF) is older but still common; it sends sound only, not picture, through a thin cable that looks like a small square port. Bluetooth is wireless and works if your TV has it built in, but it can drop the connection and adds a slight delay between what you see and what you hear.

Start by looking at the back and sides of your TV and sound bar. Write down which ports you see. Most modern TVs have at least one HDMI port labeled "ARC" or "eARC" — this is the one you want if you are using HDMI. If your TV has no HDMI-ARC port, look for an optical port (a small square opening). If you see neither, Bluetooth is your fallback, though it is the least reliable of the three.

Key Takeaways

  • HDMI-ARC is the best connection method because it carries both sound and picture, lets you control volume from one remote, and works with most modern TVs and sound bars.
  • Optical cable is a solid second choice if your TV does not have HDMI-ARC, and it requires only a single thin cable with no setup beyond plugging it in.
  • Bluetooth works without cables but can drop the connection and causes a slight delay between picture and sound, so use it only if HDMI and optical are not available.
  • After you plug in the cable, you may need to change your TV's audio output setting to tell it to send sound to the sound bar instead of its built-in speakers.
  • If the sound bar does not turn on when you turn on the TV, check that the sound bar is plugged in and that you selected the correct input on the sound bar itself.

Connecting with HDMI-ARC (the easiest method)

Find the HDMI port on the back of your TV labeled "ARC" or "eARC" — if you have more than one HDMI port, only one will have this label. Plug one end of an HDMI cable into this port. Plug the other end into the HDMI port on the back of your sound bar (it will also be labeled ARC or eARC). Plug the sound bar into a power outlet using its power cord.

Turn on your TV and sound bar. On your TV remote, go to Settings, then Sound or Audio. Look for an option called "Sound Output," "Audio Output," or "Speaker." Change it from "TV Speaker" to "HDMI," "HDMI-ARC," "External Speaker," or the name of your sound bar — the exact wording depends on your TV brand. Once you make this change, sound from your TV should come through the sound bar instead of the TV's built-in speakers.

Test it by turning up the volume on your TV remote. If the sound bar volume goes up and down with your TV remote, the connection is working correctly. If nothing happens, go back to the Sound settings and make sure you selected the right output option. If the sound bar has its own remote, you can usually use either remote to control volume, though the TV remote is simpler.

Connecting with an optical cable (if HDMI-ARC is not available)

Look for the optical port on your TV — it is a small square opening, usually on the back, sometimes labeled "Optical," "TOSLINK," or "S/PDIF." Plug one end of an optical cable into this port. Plug the other end into the optical port on your sound bar. Plug the sound bar into power.

Turn on your TV and sound bar. Go to Settings, then Sound or Audio, and find the Sound Output or Audio Output option. Change it from "TV Speaker" to "Optical," "External Speaker," or "Sound Bar." The exact name varies by TV brand. Turn up the volume on your TV remote — if the sound bar gets louder, the connection is working.

One difference from HDMI: with optical, your TV remote may not control the sound bar's volume. If that happens, use the sound bar's own remote to adjust volume, or check your TV settings to see if there is an option to enable remote control over optical audio. Some TV brands offer this, others do not.

Connecting with Bluetooth (wireless, but less reliable)

Make sure your sound bar is plugged in and turned on. On your TV remote, go to Settings, then look for Bluetooth, Wireless, or Connected Devices. Select "Pair New Device" or "Add Device." Your TV will search for nearby Bluetooth devices. When your sound bar appears in the list, select it. Your TV and sound bar will pair — this usually takes a few seconds.

Go to Settings, then Sound or Audio, and change the Sound Output to "Bluetooth" or the name of your sound bar. Test the connection by turning up the volume on your TV remote. If the sound bar gets louder, pairing worked.

Bluetooth is convenient because there are no cables, but it has two drawbacks. First, the connection can drop if your TV and sound bar move too far apart or if other wireless devices interfere. Second, there is usually a slight delay — you may see a character's lips move before you hear them speak. If this delay bothers you, switch to HDMI or optical instead.

What to do if the sound bar does not turn on

Check that the sound bar is plugged into a working power outlet. Plug a lamp or phone charger into the same outlet to confirm it has power. If the outlet works but the sound bar does not turn on, press the power button on the sound bar itself — some sound bars do not turn on automatically when you turn on the TV.

If the sound bar is on but you hear no sound, check that you selected the correct input on the sound bar. Most sound bars have a button labeled "Input" or "Source" on the remote or the device itself. Press it and cycle through the options (HDMI, Optical, Bluetooth) until you reach the one you plugged the cable into. The sound bar's display or a light on the device will show which input is active.

If you still hear nothing, go back to your TV's Sound settings and confirm that the Sound Output is set to the sound bar, not the TV speaker. If it is already set correctly, try unplugging the sound bar for 10 seconds, then plugging it back in. This resets the connection and often fixes temporary glitches.

Turning off the TV's built-in speakers

Once your sound bar is connected and working, you may want to turn off your TV's built-in speakers so sound comes only from the sound bar. Go to Settings, then Sound or Audio. Look for an option called "Speaker," "Internal Speaker," "TV Speaker," or "Audio Out." Change it to "Off" or "Disabled." This prevents sound from coming out of both the TV and the sound bar at the same time, which can sound hollow or echo.

If you cannot find this option in your TV's settings, it is usually fine to leave the TV speakers on — they will straightforward play at a very low volume while the sound bar handles most of the sound. The important thing is that your Sound Output is set to the sound bar, not the TV speaker.

Controlling volume and switching inputs

With HDMI-ARC, your TV remote usually controls both the TV and the sound bar volume at the same time. With optical or Bluetooth, you may need to use the sound bar's remote to adjust volume. Check your sound bar's manual to see if it has a "TV control" or "CEC" setting that lets your TV remote work with it — some brands offer this, others do not.

If you have multiple devices plugged into your sound bar (a TV, a gaming console, a streaming device), you will need to switch the sound bar's input to match whichever device you want to use. Press the Input or Source button on the sound bar's remote and select the port you need. Most sound bars remember which input you last used, so you may not have to switch every time.

Frequently Asked Questions

Can I use a regular HDMI cable, or do I need a special one?

A regular HDMI cable works fine for connecting a sound bar to a TV. You do not need an expensive "premium" cable. Any HDMI cable rated for your TV's resolution (usually 4K if your TV is newer) will work. The same is true for optical cables — they are all the same, and price does not matter.

What if my TV has HDMI ports but none are labeled ARC?

If your TV is older, it may not have an ARC port. In that case, use an optical cable instead — almost all TVs have an optical port. If your TV has neither HDMI-ARC nor optical, Bluetooth is your only option, though it is less stable than the other two methods.

Why is there a delay between the picture and sound with Bluetooth?

Bluetooth adds a small processing delay as it compresses and sends the audio wirelessly. This delay is usually 100 to 200 milliseconds, which is noticeable when watching movies or playing games. HDMI and optical have almost no delay, which is why they are better for video content.

Do I need to pair the sound bar every time I turn on my TV?

No. Once you pair a Bluetooth sound bar to your TV, they remember each other. The next time you turn on both devices, they should connect automatically. If they do not, unpair them and pair again — go to your TV's Bluetooth settings, find the sound bar, and select "Forget" or "Remove," then pair it again from scratch.

Can I connect a sound bar to a TV that does not have any of these ports?

If your TV has no HDMI-ARC, optical, or Bluetooth, you can use a converter box or adapter, but this adds complexity and cost. A better option is to connect the sound bar directly to your streaming device (like a Roku, Apple TV, or gaming console) instead of the TV. Most of these devices have HDMI-ARC or optical ports and can send sound to the sound bar while the TV displays the picture.