Soundbar Dolby Vision Passthrough: What to Verify

What 'Dolby Vision passthrough' names on a listing

A soundbar with an HDMI input and an HDMI output can sit between a video source, such as a streaming device, a disc player, or a game console, and the TV. When a listing says the bar offers Dolby Vision passthrough, it means the bar forwards a Dolby Vision video signal from its input to its output without processing the picture. The bar's job is audio; the video goes through it to the TV.

Dolby Vision is a high dynamic range (HDR) video format that carries picture information beyond the signal range used by standard video. The set of devices connected by HDMI must all handle the signal: the source must send it, the soundbar must pass it, and the TV must accept it. A listing that names 'Dolby Vision passthrough' is telling you the middle step is covered.

The HDMI input and output on a soundbar

Passthrough needs two HDMI connections on the bar: an input for the source and an output for the TV. Listings name these as '1 HDMI input', '1 in and 1 out', and 'HDMI output with eARC' or 'HDMI output with ARC'. The HDMI specification page describes eARC as a feature that 'simplifies connectivity, provides greater ease of use, and supports the most advanced audio formats and highest audio quality.' HDMI ARC and eARC compared explains how the two return channels differ as listing terms.

The same HDMI output carries the video signal from the bar to the TV and carries the audio return from the TV to the bar. The output port must support ARC or eARC for sound to reach the bar when the TV is the source of audio. A bar with only an HDMI output and no input, a common layout on 2.0 and 2.1 bars, cannot sit between a source and the TV. To use passthrough, the bar needs an input as well as an output.

Read the listing for both port names before you count on passthrough. The bulk of the bar's job is audio; the video path is a stated connection detail, and it is listed in the connection section of the listing rather than the audio section.

How to verify a passthrough path

Start with the listing title. The words 'Dolby Vision passthrough' or 'HDR passthrough' may appear near the model name. Then read the bullet list: look for 'HDMI input', 'HDMI output', 'eARC', and a note on the bar's video support. A title that names only 'HDMI ARC' does not tell you whether the input accepts Dolby Vision. What to check for on HDMI inputs walks through the input terms a listing can state.

Next, check the maker's page for the bar. The model name on the listing should match a model on the maker's page, and the page usually lists the port names next to the connections. If the maker's page shows a video input labeled for HDR or Dolby Vision and an output labeled eARC, you have the two halves of a passthrough path.

The HDMI specification also describes cables by bandwidth. The HDMI page names the Ultra High Speed HDMI Cable and the newer Ultra96 cable as the cable types that support the highest bandwidth applications. The listing may not name the cable in the box; read what the seller states and check with the maker if the cable type matters for your source and TV. The HDMI cable requirements guide explains how cables are named on listings.

• Read the title for the words 'Dolby Vision passthrough' or 'HDR passthrough'.
• Read the bullet list for 'HDMI input', 'HDMI output', and 'eARC'.
• Match the model name on the listing to the maker's page and read the port labels there.
• Check what the seller states about the cable in the box.

When a listing doesn't name Dolby Vision passthrough

Most soundbar listings do not name every video format the bar can pass through. A bar with an HDMI input and an eARC output may still pass Dolby Vision even if the title leaves the format out, but the listing alone cannot confirm it. The maker's page is the place to look for the words 'Dolby Vision passthrough' or a video compatibility note. What a passthrough listing leaves out looks at the same question for 4K and HDR signals.

There is a second way to build the connection that does not depend on the bar's passthrough at all: connect the source directly to the TV's HDMI input, and connect the TV's eARC or ARC output to the bar. The source's video goes straight to the TV, and the TV sends audio back to the bar. This works when the TV has eARC or ARC and the bar has an HDMI output with the matching return channel. Check both the TV and the soundbar connections before buying.

What to read next on a listing

A listing is a product sheet, not a picture assessment. It can tell you whether a bar has the ports and the format words; it cannot tell you how the video looks on your TV. This site has no data on which TVs or soundbars accept Dolby Vision, or how a bar handles the signal once it is in the chain. Read the listing's stated details and the maker's page, and once the bar is connected, switch on a Dolby Vision program on the TV to see the path for yourself.

The site's guides compare soundbars on stated details such as channel layout, subwoofer, and connections. The best HDMI ARC soundbar guide and the general soundbar guide list bars with HDMI outputs; the Dolby Atmos guide lists bars that name Atmos, and the premium guide includes bars that name HDR passthrough.

What to pick for your situation

Questions

Does a soundbar change the Dolby Vision picture?

A soundbar's listed job is audio. 'Dolby Vision passthrough' means the bar forwards the video signal from its HDMI input to its HDMI output without processing the picture. The TV is the device that decodes and displays the video.

What if my soundbar's listing doesn't name Dolby Vision passthrough?

Connect the source directly to the TV's HDMI input and use the TV's eARC or ARC output to send audio back to the bar. That path does not depend on the bar passing video.

Do I need a special HDMI cable for passthrough?

The HDMI specification describes cable types by bandwidth, including the Ultra High Speed HDMI Cable for the highest bandwidth applications. Read the listing for what the box contains and check the maker's page if the cable type matters for your source and TV.

What does eARC have to do with passthrough?

The bar's HDMI output carries the video signal to the TV and carries audio back from the TV to the bar. eARC is the feature on the output that supports advanced audio formats, and the eARC audio formats guide lists what eARC can carry. Passthrough is the input-to-output video path; eARC is the output's audio return.

Do the source and the TV both need Dolby Vision?

Yes. A Dolby Vision signal travels from the source through the bar to the TV, so the source must send it, the bar must pass it, and the TV must accept it. Read the listing and the maker's page for each device.