What Size Soundbar Should You Get for Your TV?

Start with your TV's width

The diagonal screen size on a TV spec sheet tells you little about its actual width. A 55-inch TV from one brand can be several inches wider than another, depending on the bezel. Measure the width of the screen itself, or look up the TV's width in its user manual. Your soundbar should roughly match that measurement.

Most soundbars list their width in inches. A bar that is a few inches narrower or wider than the TV screen will still work, but if it is much wider, it can extend past the edges of the TV and look unbalanced. It can also block the TV's infrared receiver for the remote. If that happens, you may need to place the soundbar lower or use a wall mount.

Before buying, measure the space on your TV stand or cabinet. The soundbar needs to sit flat and have a few inches of clearance on each side for ventilation.

Match the speaker layout to your room

The number of channels determines the speaker layout: 2.0 has left and right, 2.1 adds a subwoofer, 3.1 adds a center channel, and 5.1 adds rear surround speakers. More channels do not automatically mean better sound in every room.

In a small bedroom or office, a 2.0 or 2.1 soundbar can fill the space without overwhelming it. In a larger living room, a 3.1 soundbar with a center channel improves dialogue clarity, while a 5.1 setup with rear speakers creates a more convincing surround effect. For the most immersive experience, consider a Dolby Atmos model with up-firing drivers. See our best Dolby Atmos soundbars guide for options.

Think about where you sit. If your seating is against a wall, rear speakers have less space to work, so a 3.1 might be a better choice. If you have open space behind the seating, rear speakers can shine. Read our guide to soundbar channel numbers for a deeper explanation.

Measure your space

Measure the width of the surface where the soundbar will sit. If it goes inside a cabinet, also measure the depth and make sure the back has room for cables. A soundbar that is too long for the cabinet can stick out and block ventilation.

If you plan to mount the soundbar on the wall, check the mounting pattern and weight. Most soundbars come with a template or bracket, but you need a wall that can support the weight. Also consider the height: the soundbar should be at ear level when you are seated, or aimed toward the listening position.

Keep the soundbar away from direct obstructions like shelf edges or picture frames. The front-facing speakers need an open path to the room. See our soundbar placement guidance for more tips.

Connections and wireless options

HDMI ARC or eARC is the most capable audio connection from a TV to a soundbar. It carries high-resolution audio and supports CEC so the TV remote controls the soundbar. The HDMI Forum defines these specifications; you can check the HDMI website for details. If your TV lacks HDMI ARC, an optical cable can work but may not support the latest formats. For more on the difference, see our HDMI ARC vs eARC explainer.

Bluetooth is convenient for streaming music from your phone or tablet without a cable. The Bluetooth Classic radio handles audio streaming and is used in most speakers. Your soundbar will list its Bluetooth version; newer versions often support better quality and range, but all common versions work for typical listening.

For a permanent setup, use HDMI for the TV connection and Bluetooth only for occasional streaming. That way you get the best quality and reliable control.

Keep volume at safe levels

Your soundbar can get loud, but that doesn't mean it should. The National Institute on Deafness and Other Communication Disorders warns that long or repeated exposure to sounds at or above 85 dBA can cause hearing loss. Movie theaters often hit 74-104 dBA, so you don't need to match that at home.

Use dialogue enhancement features to raise speech clarity without turning up the whole volume. Many soundbars have a night mode that compresses dynamics for quieter listening. If you're frequently at maximum volume, consider a more powerful soundbar or a subwoofer to handle the bass, rather than cranking the bar. Learn about dialogue enhancement to improve clarity at lower levels.

Subwoofers and rear speakers

A subwoofer adds depth to music and action scenes, but placement matters. A wireless subwoofer gives you flexibility to place it in a corner or near a wall. Rear speakers add a true surround effect, but they need space on either side of your seating.

If you have a compact room, a 2.1 soundbar with a wireless subwoofer can provide enough bass without extra speakers. For a large room, a 5.1 setup with rear speakers spreads the soundstage. For the most immersive experience, consider a Dolby Atmos system with up-firing drivers.

Check our guides for the best soundbars with subwoofers and soundbars with rear speakers to see what fits your space.

What to pick for your use

Questions

Do I need a soundbar that is wider than my TV?

No. A soundbar roughly the width of the TV screen looks balanced and fits on most stands. If it is much wider, it may block the TV's remote sensor or stick out awkwardly.

Can I wall-mount a soundbar with my TV?

Yes, many soundbars have keyholes or brackets. Check the weight and mounting pattern, and ensure the wall is strong enough. The soundbar should be placed at ear level or angled toward the listener. See our mounting options guide for more.

Does more channels mean better sound?

Not always. The room size, placement, and quality of drivers matter. A 3.1 soundbar in a small room can sound better than a 5.1 arranged poorly. Choose based on your space and seating.

Should I use HDMI or optical for my TV?

HDMI ARC or eARC is recommended because it supports higher-resolution audio and control features. If your TV only has optical, that can still work, but you may miss out on some formats. Learn more in our HDMI ARC vs eARC comparison.

How many watts do I need?

Wattage is not a reliable indicator of performance. Instead, consider the size of the room and whether you need extra speakers for immersion. A higher wattage doesn't always mean louder or better sound.