Main trade-off
Sony BRAVIA Theater Bar 9
The subwoofer and rear speakers are separate purchases.
Head-to-head
Sony BRAVIA Theater Bar 9 vs Sonos Arc Ultra: Sony accepts a console directly, Sonos needs enough source inputs on the TV
The short answer
Choose the Sony Bar 9 when one console or disc player needs a direct HDMI connection. Choose Arc Ultra if your sources already fit on the TV and you want Sonos music and expansion. The Sony is wider, and neither standard package includes a subwoofer or rear speakers.
Before you choose
The reasoning and the trade-offs
A direct input can bypass an audio-format bottleneck
A player connected to Sony can send supported audio to the bar without first asking the TV to pass it through.
What this is based on
The source format must still be supported by the bar, and video mode support must be checked. Arc Ultra receives source audio through the TV, so TV passthrough remains part of that chain.
Main trade-off
Sonos Arc Ultra
There are no separate HDMI inputs for a console or disc player.
Sony BRAVIA Theater Bar 9
- Choose it for
- You need one direct 4K 120 Hz HDMI input.
- You want a disc player to send supported audio straight to the bar.
- Main trade-off
- The subwoofer and rear speakers are separate purchases.
Sonos Arc Ultra
- Choose it for
- Your video sources can all connect to the TV.
- A 51.18-inch-wide cabinet will not fit but 46.38 inches will.
- Main trade-off
- There are no separate HDMI inputs for a console or disc player.
About this comparison
Compare Sony Bar 9 and Sonos Arc Ultra by HDMI routing, cabinet width, TV compatibility and the extra cost of subwoofers and rear speakers.
The Sony changes where one HDMI source can connect. The Sonos needs the TV to switch every video source.
Winner by situation
Start with what you need it to do
One console through the bar at 4K 120 Hz
Sony has a source input and Sonos does not.
- Sony BRAVIA Theater Bar 9
- Better fit
- Sonos Arc Ultra
- Not suitable
A 49-inch-wide soundbar position
Cabinet width only, before acoustic clearance.
- Sony BRAVIA Theater Bar 9
- Not suitable
- Sonos Arc Ultra
- Better fit
A 2.7-inch screen gap
Sony is lower despite being wider.
- Sony BRAVIA Theater Bar 9
- Better fit
- Sonos Arc Ultra
- Caution
An existing Sonos household
Existing music controls can simplify ownership.
- Sony BRAVIA Theater Bar 9
- Depends
- Sonos Arc Ultra
- Better fit
What matters in practice
The differences that matter
A direct input can bypass an audio-format bottleneck
A player connected to Sony can send supported audio to the bar without first asking the TV to pass it through.
How we reached this conclusion
The source format must still be supported by the bar, and video mode support must be checked. Arc Ultra receives source audio through the TV, so TV passthrough remains part of that chain.
Neither model is smaller in every direction
Arc Ultra saves 4.8 inches of width, while Sony saves 0.43 inch of cabinet height.
How we reached this conclusion
A 49-inch-wide position favors Sonos. A 2.7-inch screen gap favors Sony. A setup with both constraints may fit neither without moving the TV.
A full surround comparison needs two full shopping lists
Both listed ASINs are standalone bars.
How we reached this conclusion
Add each brand’s compatible subwoofer and rear speakers before comparing the final system cost. Comparing one bar against another brand’s complete bundle hides the largest purchase difference.
Try your real numbers
Will the soundbar fit under your TV?
Measure the clear space in front of your TV. Count devices you want to plug into the soundbar, not devices already connected to the TV. The numbers below are examples until you enter yours.
Sony BRAVIA Theater Bar 9
Does not meet these checksIt needs 51.18 inches of width, more than your 48 inches.
Sonos Arc Ultra
Does not meet these checks0 separate HDMI source inputs cannot take the 1 device you want to connect to the bar.
Use an open top surface, not an enclosed cubby. Detachable speakers are counted in the docked width. Allow extra depth for cables and the TV stand. This checks physical dimensions and port counts, not Dolby Atmos, 4K/120Hz passthrough or your TV’s audio-format support.
Choice A
Sony, HT-A9000
Sony BRAVIA Theater Bar 9
The Bar 9 is for a wide TV setup where you want a direct high-refresh HDMI connection and plan to choose the subwoofer and rear speakers separately. Measure the cabinet first. The bar itself is just over 51 inches wide.
- Best matched use
- A wide TV stand with one high-refresh HDMI source
Checked facts
- Bar measures 1,300 × 64 × 113 mm.
- One HDMI source input and one HDMI eARC TV connection.
- Manufacturer confirms 4K 120 Hz and VRR passthrough.
- Thirteen speaker units include upward-firing drivers.
- Wi-Fi music and phone-guided Sound Field Optimization are supported.
Choice B
Sonos, Arc Ultra
Sonos Arc Ultra
Choose the Arc Ultra when you want a single bar now and the option to add a Sonos subwoofer and rear speakers later. It needs nearly 47 inches of cabinet width and uses your TV for source switching.
- Best matched use
- A spacious TV stand and a surround system you can build in stages
Checked facts
- Cabinet measures 46.38 × 2.95 × 4.35 inches.
- HDMI eARC or ARC connection, with no separate HDMI source inputs.
- Upward-firing drivers provide height output for compatible Dolby Atmos content.
- Wi-Fi music, Bluetooth audio, Speech Enhancement and Night Sound are supported.
- Trueplay tuning works with supported iOS and Android devices.
Meaningful differences
What changes the fit
| What changes | Sony BRAVIA Theater Bar 9 | Sonos Arc Ultra | Why it matters |
|---|---|---|---|
| HDMI source inputs | 1 with 4K 120 Hz and VRR | 0 | Sony can receive audio directly from one source before sending its video to the TV. |
| Cabinet width | 51.18 inches | 46.38 inches | Sonos saves 4.8 inches of stand width. |
| Cabinet height | 2.52 inches | 2.95 inches | Sony is wider but lower. Measure both dimensions. |
| Included external speakers | None | None | Both require extra purchases for physical rear speakers and a separate subwoofer. |
| TV-brand extras | Selected features need compatible BRAVIA TV | Core operation is not tied to a TV brand | Check the exact TV requirements rather than treating every HDMI connection as equivalent. |
What you give up
Every choice has a cost
If you choose Sony BRAVIA Theater Bar 9
- Only one separate HDMI source input is available.
If you choose Sonos Arc Ultra
- A subwoofer and rear speakers cost extra.
What matters in practice
Before you choose
What this comparison cannot tell you
- This comparison uses manufacturer specifications and package contents, not a controlled listening test. Room shape, placement and source content affect the result.
What the facts say
What the comparison shows
Useful conclusions from the current soundbars comparison, followed by the checked facts used to reach them.
Compared set
Only 9 of 31 models checked match every need here: “My TV is running out of HDMI ports” and “I will add rear speakers later”.
9 matching models from 31 checkedSee the checked facts and calculation notes
Match countThe count uses the current product-to-need assignments for “My TV is running out of HDMI ports” and “I will add rear speakers later”. A need with no documented match does not count.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Sony BRAVIA Theater Bar 9 |
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| Sonos Arc Ultra |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Sony BRAVIA Theater Bar 9
You need one direct 4K 120 Hz HDMI input.
See price & reviews on AmazonSonos Arc Ultra
Your video sources can all connect to the TV.
See price & reviews on AmazonLinks open in a new tab.