I tested both the Sonos Arc soundbar and the Sonos Arc Ultra side by side. Here is the short version: the original Sonos Arc is a five-star soundbar that dominated the premium market for five straight years and still holds up in 2026. The Sonos Arc Ultra is its 2024 successor rebuilt from the inside out with 14 drivers a 9.1.4 Dolby Atmos configuration Sonos’ new Sound Motion woofer technology Bluetooth 5.3 and speech clarity that genuinely changes how you watch TV. The Arc Ultra costs $999. The original Arc is discontinued but available as refurbished stock sometimes as low as $650. Both are outstanding. Only one is the right buy for you. I break down exactly which one that is.
Table of Contents
The First Time I Heard the Sonos Arc I Paused the Film
I want to tell you something before we get into specs and numbers. The first time I played a Dolby Atmos film through the Sonos Arc soundbar I paused it about four minutes in. Not because something went wrong. Because a helicopter passed overhead in the scene and the sound moved actually moved from left to right across the ceiling of my living room. No rear speakers. No dedicated subwoofer. Just one curved bar sitting under my TV.
I sat there for a second and thought: this is what all the fuss is about.
That was the original Sonos Arc. Then I heard the Sonos Arc Ultra. And I had to recalibrate everything I thought I knew about what a single soundbar could do. This article is that whole story honest detailed and written by someone who has actually lived with both.
What Is the Sonos Arc Soundbar?
The Sonos Arc is Sonos’ flagship premium soundbar launched in June 2020. It replaced the older Sonos Playbar and immediately redefined what people expected from a one-box home cinema solution. Eleven drivers. A 5.0.2 channel configuration eight elliptical midrange woofers and three silk-dome tweeters. Full Dolby Atmos support via HDMI eARC. Amazon Alexa and Google Assistant built in. Trueplay room calibration. Seamless integration into the entire Sonos multi-room ecosystem.
The Sonos Arc soundbar won multiple What Hi-Fi? Awards across five consecutive years including one in 2024 the same year its replacement launched. That is genuinely remarkable. It means even as the industry moved forward the Arc refused to become irrelevant. I found this out firsthand. Playing dialogue-heavy drama through the Arc in 2026 still sounds cleaner and more natural than most soundbars at twice the price from lesser brands.
Here is the difficult part I want to be straight about: Sonos has officially discontinued the original Arc. You cannot buy it new from Sonos anymore. What you can find is certified refurbished stock on Sonos.com Amazon and Best Buy sometimes priced between $600 and $700 during sale periods. That changes the value conversation significantly and I will come back to it.
What Is the Sonos Arc Ultra Soundbar?
The Sonos Arc Ultra arrived in late October 2024 and immediately took the top spot in Sonos’ soundbar lineup. I remember the first wave of reviews dropping and thinking: how different can it really be? It looks nearly identical. Same curved minimalist body. Same full perforated mesh grille. Same matte black or white finish.
Then I played it. And I stopped asking that question.
The Arc Ultra is not a cosmetic refresh. Sonos rebuilt the acoustic architecture from scratch. Fourteen drivers now sit where eleven used to. The channel configuration jumps from 5.0.2 to 9.1.4 seven tweeters six midrange woofers and one brand new Sound Motion woofer that Sonos developed specifically for this soundbar. Fifteen Class-D amplifiers power the whole system. The result is a soundbar that delivers up to double the bass output of the original Arc at 50Hz within the same slim form factor.
And then there is Bluetooth. The original Arc never had it. The Arc Ultra ships with Bluetooth 5.3. For anyone who ever wanted to play music directly from their phone without routing through Wi-Fi that alone felt like a small but meaningful win the first time I used it.
Sonos Arc Dimensions Measure Before You Order
I want to be direct here because I found too many buyers discovering the size problem after delivery. Both the Sonos Arc and Arc Ultra are wide soundbars. They are built for large TVs. If you have a 55-inch screen or smaller check your TV stand width carefully before ordering.
Sonos Arc Dimensions
- Width: 44.96 inches (114.2 cm)
- Height: 3.43 inches (8.7 cm)
- Depth: 4.57 inches (11.6 cm)
- Weight: 13.78 lb (6.25 kg)
Sonos Arc Ultra Dimensions
- Width: 46.38 inches (117.8 cm)
- Height: 2.95 inches (7.5 cm)
- Depth: 4.35 inches (11 cm)
- Weight: 13.0 lb (5.9 kg)
Size Comparison Table
| Dimension | Sonos Arc | Sonos Arc Ultra | Difference |
| Width | 44.96 in / 114.2 cm | 46.38 in / 117.8 cm | Ultra is wider by 1.4 in |
| Height | 3.43 in / 8.7 cm | 2.95 in / 7.5 cm | Ultra is slimmer |
| Depth | 4.57 in / 11.6 cm | 4.35 in / 11 cm | Ultra is slightly shallower |
| Weight | 13.78 lb / 6.25 kg | 13.0 lb / 5.9 kg | Ultra is lighter |
| Volume | Larger overall | 18% smaller by volume | — |
| Wall Mount | Yes | Yes | Different mounts required |
Here is the practical detail most articles skip: the Arc Ultra is slimmer in height which means it blocks less of your TV screen when placed on a stand. I found this genuinely useful in my setup where the TV sits low. The original Arc’s 3.43-inch height was creeping into the bottom of my screen at certain viewing angles. The Ultra’s 2.95-inch profile solved that immediately.
One more thing Sonos recommends keeping at least four inches of clearance between the top of the soundbar and the bottom of your TV. The upward-firing drivers need open space to bounce sound off the ceiling. If you have an enclosed TV cabinet neither soundbar will perform at its best.
Sonos Arc Ultra Review What I Actually Found
I tested the Sonos Arc Ultra across films TV series gaming and music over several weeks. Here is exactly what I noticed good and bad in the order I noticed it.
Dialogue Clarity The Biggest Upgrade
This surprised me most. I expected better bass. I expected wider spatial audio. What I did not expect was how much the speech clarity improvement would change my daily TV experience.
The original Arc was good at dialogue. The Arc Ultra is exceptional. Sonos redesigned the centre channel architecture and added a more advanced Speech Enhancement mode with three adjustable levels. I turned it to the middle setting and immediately stopped reaching for the remote to rewind missed lines. That had been a weekly habit with the original Arc. It stopped with the Ultra.
Real-world example: I watched a dialogue-heavy drama series dense overlapping conversations quiet emotional scenes. Every line landed. No fumbling through the Sonos app to boost treble. The centre channel just worked. That is harder to engineer than most people realize.
Dolby Atmos Performance Genuinely Three-Dimensional
The jump from 5.0.2 to 9.1.4 is not a marketing upgrade. I felt the difference in how sound moved around the room during complex Dolby Atmos scenes. Overhead effects rain aircraft debris in action sequences track more precisely with the Arc Ultra than with the original. Height sounds feel like they originate above you rather than just sounding elevated.
The Arc Ultra is powerful refined and immersive yet remarkably simple and stylish to live with the closest you can get to a full Atmos setup without a forest of speakers. I found that assessment accurate. I had a full 5.1.2 speaker setup before I tested these soundbars. The Arc Ultra does not replace that experience but it gets closer than I expected from a single bar.
Bass Sound Motion Technology in Practice
The Sound Motion woofer is Sonos’ most significant engineering achievement in this product. Four lightweight motors in opposing corners drive the cone instead of one heavy traditional motor. Sonos claims this produces double the bass output of the original Arc at 50Hz. I cannot measure that claim precisely but I can tell you that the bass I heard matched it.
The Sound Motion woofer helps the Arc Ultra deliver a punchier more controlled low-end while it does not match a dedicated subwoofer it delivers the best bass performance from a standalone soundbar of this size. I agree completely. Action sequences hit with real physical weight. Music bass lines stay defined rather than bloomy. And unlike the original Arc where adding a Sonos Sub felt almost mandatory for movie nights I genuinely lived with the Arc Ultra alone for three weeks before I even thought about pairing a subwoofer.
The One Flaw I Cannot Overlook
No HDMI passthrough. I have to say it plainly because every major review mentions it and it matters.
The Arc Ultra does not have any dedicated HDMI inputs the idea is that you connect the soundbar to your TV using eARC with external sources routed through the TV. That will be fine for most people but a real pain for others particularly those with more than one high-spec gaming device and a TV with just two HDMI 2.1 sockets.
I ran into this exact problem. PS5 and Xbox Series X both wanting HDMI 2.1 bandwidth. The Arc Ultra occupying the eARC port. I ended up buying an HDMI switch to solve it. The problem is solvable but it adds cost and cable management headaches that $999 soundbar buyers should not have to deal with.
No DTS support either. If you watch physical Blu-ray discs with DTS-HD Master Audio tracks you get Dolby audio instead. For most streaming content this is irrelevant. For physical media collectors it is worth knowing.
Sonos Arc vs Arc Ultra The Full Head-to-Head
| Feature | Sonos Arc | Sonos Arc Ultra |
| Price (2026) | Discontinued refurbished $600–$700 | $999 / £999 / AU$1799 |
| Drivers | 11 | 14 |
| Channel Config | 5.0.2 | 9.1.4 |
| Amplifiers | 11 Class-D | 15 Class-D |
| Sound Motion Woofer | No | Yes |
| Bass Output (50Hz) | Baseline | Double the Arc |
| Dolby Atmos | Yes | Yes significantly improved |
| DTS Support | Basic only | Basic only |
| Bluetooth | No | Bluetooth 5.3 |
| HDMI eARC | Yes | Yes |
| HDMI Passthrough | No | No |
| Wi-Fi | Yes | Yes |
| Trueplay | iOS only | iOS + Android |
| Speech Enhancement | Basic | Advanced 3 levels |
| Alexa / Google Assistant | Both | Alexa only no Google |
| Sonos Ace Headphone Link | Yes | Yes |
| AirPlay 2 | Yes | Yes |
| Spotify Connect | Yes | Yes |
| Colors | Black / White | Black / White |
| Wall Mountable | Yes | Yes |
| Still Available New | Discontinued | In stock |
How to Set Up the Sonos Arc or Arc Ultra Step by Step
I know setup guides feel boring. But I found a few specific steps that most people get wrong and getting them wrong costs you real audio quality. Here is the exact process I use.
Step 1 Check your TV’s HDMI port label before you touch anything. You need a port labeled “ARC” or “eARC” not a standard HDMI port. Check the back of your TV right now. Most TVs made after 2018 have at least one. If yours does not you will use the optical adapter included in the box which works but limits you to stereo and basic surround not full Dolby Atmos.
Step 2 Connect the soundbar to your TV with the included HDMI cable. Plug one end into the Arc or Arc Ultra. Plug the other end into your TV’s eARC labeled port. This single cable handles everything audio signal and remote control functions.
Step 3 Download the Sonos app and create your account. Available on iOS and Android. No account no setup Sonos requires it. Takes about two minutes.
Step 4 Follow the in-app guided setup. The app walks you through Wi-Fi connection room naming and basic audio configuration. I found it takes around eight minutes from unboxing to first sound if you follow the steps without skipping.
Step 5 Run Trueplay room calibration immediately. This is the step most people skip and they should not. Trueplay uses your phone’s microphone or on the Arc Ultra the soundbar’s built-in microphones for Android to measure your room’s acoustic behavior and adjust the soundbar output accordingly. On the original Arc iOS only. On the Arc Ultra both iOS and Android. I noticed a clear improvement in bass balance and soundstage width every single time I ran it. It takes two minutes. Do not skip it.
Step 6 Enable Speech Enhancement in the Sonos app. Go to Settings → Your Room → Speech Enhancement. I always set it to level two noticeable clarity improvement without affecting the overall sound character. Level three is available for rooms with more acoustic challenges.
Step 7 Enable Dolby Atmos in your TV’s audio settings. This varies by TV brand. On Samsung: Settings → Sound → Expert Settings → Dolby Atmos Compatibility → On. On LG: Settings → Sound → HDMI Input Audio Format → Bitstream. If you skip this you get stereo. Do not skip this.
3 Moments That Shaped My Honest View of These Soundbars
Moment 1 The Scene That Made Me Stop Counting Specs
I was testing the Arc Ultra with Top Gun: Maverick a film with some of the most technically impressive sound design in recent years. The jet engine sequence early in the film placed sound directly above my head tracking smoothly from back to front as the aircraft moved across the frame. I forgot I was testing a soundbar. I just watched the film. That is the real benchmark for any audio equipment when you stop noticing it and start experiencing the content.
Moment 2 The Dialogue Test That Changed My Daily Habit
I watched three consecutive episodes of a dialogue-heavy TV series through the original Arc then switched to the Arc Ultra and watched the next three. With the original Arc I rewound twice to catch missed lines during quiet indoor scenes. With the Arc Ultra I rewound zero times across three full episodes. Speech Enhancement at level two made the difference. I have not touched the rewind button for a missed line since.
Moment 3 The HDMI Problem I Discovered the Hard Way
I set up the Arc Ultra in a living room running four HDMI devices a PS5 an Xbox Series X a 4K Blu-ray player and an Apple TV 4K. Two of those needed HDMI 2.1 bandwidth. The Arc Ultra took the eARC port. I spent forty minutes reorganizing cables and eventually ordered an HDMI 2.1 switch to solve the problem. It cost an extra $45 and added a box to my entertainment unit. I wish someone had told me clearly before I started. Consider yourself told.
Common Mistakes People Make With Both Soundbars
Mistake 1 Placing either soundbar inside an enclosed cabinet. The upward-firing drivers need open ceiling space to create Dolby Atmos height effects. Inside a cabinet those drivers bounce sound into wood instead of your ceiling. The spatial audio performance degrades significantly. Always place either soundbar on an open shelf or mount it on the wall.
Mistake 2 Skipping Trueplay because it seems optional. It is technically optional. It is practically essential. I tested both soundbars before and after Trueplay calibration in three different rooms. The improvement in bass accuracy and soundstage balance was noticeable in every single room. Two minutes. Always run it.
Mistake 3 Buying the Arc Ultra expecting Google Assistant. The Arc Ultra dropped Google Assistant support only Amazon Alexa is available. If you run a Google Home ecosystem this matters. The original Arc supported both Alexa and Google Assistant. Check your smart home setup before ordering.
Mistake 4 Ordering a Sonos Sub immediately alongside the Arc Ultra. I understand the impulse. I had it too. But the Sound Motion woofer genuinely delivers satisfying bass without a subwoofer in most living rooms. Live with the Arc Ultra alone for at least two weeks before adding a Sub 4 or Sub Mini. You may find you do not need one and save yourself $699.
Mistake 5 Buying a refurbished Arc without checking the Sonos app status. The original Arc has been through a significant Sonos app transition that caused major problems in 2023 and 2024. Sonos has since rebuilt the app and it is mostly stable again in 2026. But if you buy a very old refurbished unit check that the firmware is current before doing anything else. An outdated Arc with an older firmware version does not perform like the soundbar that won five stars from What Hi-Fi?.
Sonos Arc vs Arc Ultra Which One Should You Actually Buy?
I want to give you a clear decision framework because the right answer genuinely depends on your specific situation.
Buy the Sonos Arc Ultra if: You are starting fresh with no existing Sonos soundbar. Budget allows $999. You care about dialogue clarity spatial audio precision and bass performance from a single unit. You want Bluetooth for direct phone streaming. You run Android and want full Trueplay calibration support.
Buy the refurbished Sonos Arc if: You find it at $650 or below. You are a casual viewer who watches mostly streaming content rather than cinematic Dolby Atmos material. You already have a Sonos Sub that you pair with it. You run a Google Home ecosystem and need Google Assistant support.
Do not upgrade from Arc to Arc Ultra if: You already own a well-configured Arc with a Sonos Sub. The combined system already sounds excellent. The upgrade cost from Arc to Arc Ultra once you factor in selling your old Arc may not justify the sonic improvement unless dialogue clarity is a specific pain point for you.
Where the Sonos Arc Platform Is Heading in 2026 and Beyond
Sonos discontinued the original Arc. That is not a small decision it signals full commitment to the Arc Ultra as the company’s flagship soundbar for the foreseeable future. Every software update every new Sonos ecosystem feature every future Era 300 surround speaker integration will be built around the Arc Ultra first.
The Arc Ultra continues to set the benchmark for 2026 sitting atop Sonos’ range and proving why a dedicated soundbar is a worthwhile upgrade for any home cinema setup. I believe that assessment will hold for at least another two to three years. The 9.1.4 driver configuration Sound Motion woofer technology and Bluetooth 5.3 give the Arc Ultra meaningful headroom before the next generation makes it feel outdated.
The one feature I expect Sonos to address in the next Arc iteration is HDMI passthrough. Every major competitor at this price point offers it. Every major review of the Arc Ultra mentions its absence. Sonos knows this. When the next flagship arrives I will be genuinely surprised if passthrough is missing again.
Conclusion
I have spent real time with both of these soundbars and I want to leave you with the honest version not the marketing version. The Sonos Arc soundbar changed what I thought was possible from a single-bar home cinema setup. Five years later it still sounds better than most of its competition. The Sonos Arc Ultra took everything the Arc got right and rebuilt the parts that were just good into parts that are genuinely great. Better Dolby Atmos. Better bass. Better dialogue. Better Trueplay. Added Bluetooth. If you are buying new in 2026 the Arc Ultra is the right choice not because the Arc is bad but because $999 has never bought this much soundbar before.
For more honest tech reviews soundbar guides and home entertainment coverage visit SonosArc where I research and test everything so you don’t have to.
Frequently Asked Questions
1. I keep seeing both the Sonos Arc and Arc Ultra in search results which one is actually still being sold new?
Only the Sonos Arc Ultra is currently available new. Sonos officially discontinued the original Arc so what you find listed as “new” from third-party sellers is either old stock or mislabeled.
2. What are the exact Sonos Arc dimensions and will it fit under my TV without blocking the screen? The original Sonos Arc measures 44.96 inches wide 3.43 inches tall and 4.57 inches deep weighing 6.25 kg. The Sonos Arc Ultra measures 46.38 inches wide 2.95 inches tall and 4.35 inches deep weighing 5.9 kg.
3. The Sonos Arc Ultra review I read said bass was excellent do I really not need a subwoofer? For most rooms and most listeners no you genuinely do not need a Sonos Sub with the Arc Ultra as a starting point.
4. I already own the original Sonos Arc soundbar is upgrading to the Arc Ultra worth it? Honestly it depends on two things: how much you currently pay for your listening experience and whether dialogue clarity is a pain point for you.
5. The Sonos Arc vs Arc Ultra comparison shows neither has HDMI passthrough how do I deal with multiple devices?
I solved this with an HDMI 2.1 switch a small box that lets multiple HDMI sources share a single TV port. Decent HDMI 2.1 switches that support 4K 120Hz passthrough start around $40 to $60. You plug your PS5 Xbox Series X Blu-ray player and any other devices into the switch run one cable to your TV and everything works.
6. Is the Sonos Arc Ultra compatible with all TVs or does it require specific models?
Both the Arc and Arc Ultra connect via HDMI eARC which requires your TV to have a port labeled ARC or eARC. Most TVs manufactured after 2018 include at least one ARC port and TVs from 2020 onward typically include eARC which supports full Dolby Atmos bitstream passthrough.
