Modern TVs are beautifully thin — and that's exactly why they sound weak. There's simply no room for real speakers. A soundbar is the easiest upgrade you can make: one box under the TV, one cable, and suddenly dialogue is clear and movies feel big.
But the numbers on the box — 2.1, 3.1, 5.1.2 — can be confusing. Here's what they mean and how to choose.
What the numbers mean
A soundbar is described by three numbers:
- First number: main speaker channels (left, center, right, surrounds)
- Second number: subwoofer (1 = has one)
- Third number: upward-firing "height" speakers for Dolby Atmos
So a 5.1.2 soundbar has five main channels, a subwoofer and two height speakers.
Which setup is right for you?
2.0 / 2.1 — simple upgrade Left and right speakers, maybe with a subwoofer. Much better than TV speakers, great for bedrooms and small rooms.
3.1 — best for dialogue Adds a dedicated center channel, which is where voices come from. If you're always turning on subtitles, this is the biggest single improvement.
5.1 — surround sound Adds surround speakers (often small rear speakers) so sound moves around you. Great for movies and games.
5.1.2 and up — Dolby Atmos Height speakers bounce sound off the ceiling for a 3D effect — rain overhead, helicopters flying past. Works best with a flat ceiling around 8–10 feet high.
Do you need a subwoofer?
A subwoofer handles deep bass — explosions, music, the rumble of a stadium. Most people love having one. Skip it only if you live in an apartment with thin walls or a very small room. Many soundbars include a wireless sub you can place anywhere near a power outlet.
Connect it the right way: HDMI eARC
The best connection is HDMI eARC (or ARC on older TVs):
- Plug the soundbar into the TV's HDMI port labeled eARC or ARC.
- Turn on HDMI-CEC in the TV settings (brands call it Anynet+, Simplink, Bravia Sync and so on).
- Set the TV's audio output to the soundbar or "receiver."
Now your TV remote controls the soundbar volume, and every app, antenna channel and game console plays through it. Optical cable works too, but it doesn't carry the best Dolby Atmos formats.
Features worth paying for
- Dialogue or voice mode — lifts voices above background music
- Night mode — keeps loud scenes quieter late at night
- Room calibration — tunes the sound to your room using a microphone
- Wi-Fi streaming — plays music from your phone or smart speaker
- Expandability — lets you add rear speakers or a bigger sub later
Size and placement
- Choose a soundbar about as wide as your TV or a little smaller.
- Make sure it doesn't block the TV's remote sensor or bottom edge.
- If you wall-mount the TV, mount the soundbar just below it.
- Keep Atmos soundbars in the open — not inside a cabinet.
Our quick picks by need
- "I can't hear the dialogue": a 3.1 soundbar with a voice mode
- Small room or bedroom: a compact 2.0 or 2.1 bar
- Movie night every weekend: 5.1 with a wireless sub
- Home-theater feel: 5.1.2 or higher with Atmos
Pairing a new soundbar with a new TV? Our OLED vs QLED vs Mini-LED guide helps you choose the screen.
Frequently asked questions
Is a soundbar better than TV speakers?
Almost always. Even an entry-level soundbar has larger drivers and more power than the tiny speakers inside a thin TV, so voices are clearer and music is fuller.
What is HDMI eARC and do I need it?
eARC lets the TV send high-quality audio, including Dolby Atmos, to the soundbar over one HDMI cable, and lets your TV remote control the volume. It's the best way to connect.
Is Dolby Atmos worth it?
In a room with a flat, standard-height ceiling, Atmos adds a real sense of height and space. If you mainly watch news and sitcoms, a good 3.1 bar may be all you need.
Can I add rear speakers later?
Many soundbars let you add wireless rear speakers and a subwoofer later. Check that the model you buy supports it.
