How Many HDMI Ports Does a Soundbar Need?

HDMI ports on a soundbar: inputs and passthrough

HDMI ports on a soundbar are not complicated once you separate the two roles. The first role is the connection back to your television. Most soundbars include an HDMI output labeled ARC or eARC, and that port carries audio from the TV back to the soundbar. The second role is an input for source devices. An HDMI input accepts a streaming player, cable box, game console, or Blu-ray player, and the soundbar can send that source's video on to the TV while it plays the audio. That video path is called passthrough.

Before choosing a soundbar, check where your devices are going to plug in. If the television is the center of the setup, the soundbar is just an audio destination and needs only the HDMI output. If you plan to connect a source directly to the soundbar, you need an HDMI input. You can learn more in the soundbar HDMI connections guide.

One HDMI input is enough for most living rooms

For most homes, one HDMI input on a soundbar is enough. The common layout is simple: every source plugs into the TV, and the TV sends audio back to the soundbar using its HDMI ARC or eARC port. With that arrangement, the soundbar does not have to sit between the source and the TV, and switching between a streaming app, game console, and cable box happens on the TV.

Using the TV as the hub has a practical advantage: the soundbar does not need to pass video through, so you avoid questions about passthrough latency or HDR handling. The only requirement is that your TV has HDMI ARC or eARC, and that the soundbar's HDMI output matches it. For an explanation of the difference, see HDMI ARC vs eARC.

If you have a single extra device that does not have its own TV port, the one HDMI input on a soundbar is useful. Put that one device into the soundbar, leave everything else on the TV, and you have a clean two-path setup: the soundbar handles one source directly and receives all other audio through ARC or eARC.

When two HDMI inputs make sense

A soundbar with two HDMI inputs starts to make sense when the number of source devices is close to the number of ports on your television. Modern TVs often have only a few HDMI ports, but a living room can collect a cable box, streaming stick, game console, and disc player. If your TV ports run out, an extra HDMI input on the soundbar gives you one more place to connect a device.

Two inputs are also useful when your television is older and does not have ARC or eARC. In this situation, you can connect a source directly to the soundbar's input and then use the soundbar's HDMI output to send video to the TV. The soundbar now generates the sound for that source instead of depending on the TV to send audio back.

Home theater buyers sometimes prefer two HDMI inputs even when the TV has ports. Running a console or Blu-ray player through the soundbar can simplify the system and keep the video path close to the audio processor. If you play games, compare how each soundbar handles HDMI passthrough and modern gaming features; you can read more in soundbar HDMI input passthrough latency and soundbar HDMI 2.1 features.

HDMI versus the other ways to connect

HDMI is the primary cable connection for modern soundbars because one cable carries both high-resolution video and audio. The HDMI specification continues to evolve; the HDMI Forum has released the HDMI 2.2 specification, which raises bandwidth to 96Gbps and adds next-generation Fixed Rate Link technology for a wide range of applications. Newer HDMI versions also add gaming features such as Variable Refresh Rate and Auto Low Latency Mode.

Other connections have smaller roles. Optical audio can carry digital sound on older TVs and is often the only digital audio option when HDMI is unavailable, but it cannot carry the same high-bandwidth object-based audio formats. Bluetooth is useful for playing music from a phone; the Bluetooth Classic radio is designed mainly for wireless audio streaming, but it is not the main path from a TV to a soundbar for film and broadcast sound. For a fuller comparison, see soundbar optical vs HDMI and soundbar TV audio output formats.

If your TV lacks ARC or eARC, the connection path changes. You can connect a source to the soundbar's HDMI input and then pass video to the TV, which is better than relying on an analog connection. Industry groups such as the Consumer Technology Association also develop standards that help audio and video products work together, but the HDMI port specification itself comes from the HDMI Forum.

How to choose the right HDMI port setup

When you compare soundbars, look at the port labels instead of the total number of ports. HDMI IN ports accept source devices. HDMI OUT with ARC or eARC connects to the TV. Some soundbars offer only eARC with no extra inputs; that is fine if your TV has enough ports for everything. If you want to keep options open, choose a soundbar with at least one HDMI input. For the best matches, browse the best HDMI ARC soundbars and think about whether your future setup will run more than one source through the bar.

• TV manages all switching: choose a soundbar with HDMI ARC or eARC and no extra inputs.
• TV is older or lacks ARC/eARC: choose a soundbar with at least one HDMI input.
• Multiple devices and limited TV ports: choose a soundbar with two HDMI inputs.
• You want the simplest possible soundbar: one HDMI output is enough.

What to pick for your use

Questions

Is one HDMI port on a soundbar enough?

For most people, yes. If your television has HDMI ARC or eARC and enough inputs for your devices, the soundbar only needs its HDMI output. One input is enough for a secondary device if you want direct connection.

What does HDMI passthrough do on a soundbar?

HDMI passthrough lets a source device connect to the soundbar's input. The soundbar plays the audio and sends the video through its HDMI output to the television. This is helpful when the TV has limited ports or no ARC/eARC.

Does the number of HDMI inputs affect sound quality?

The input count itself does not determine sound quality. The connected formats matter more. HDMI can carry high-bandwidth audio and video, and the soundbar's decoding and speaker system determine what you hear.

Do I need HDMI 2.1 ports on a soundbar for gaming?

If you play games, look for HDMI inputs that support the features you need, such as high frame rate video passthrough. The HDMI Forum's newer specifications include enhanced gaming features like Variable Refresh Rate and Auto Low Latency Mode.

Can I use a soundbar without an HDMI cable?

Yes, but you will give up some audio formats. Optical and analog connections are alternatives on older TVs. Bluetooth can stream music, but television audio and object-based formats usually need HDMI.