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Sonos is a leading American audio technology company that is best known for pioneering wireless multiroom audio systems, which make it easy for listeners to stream music and other content throughout their homes. The company continues to innovate, creating wireless speakers, home theater systems, headphones, architectural components, and integrated home audio solutions that revolutionize how people listen and connect to sound.

When we created Sonos Arc, our goal was to push beyond the limits of what a soundbar could deliver. The Arc name has since become synonymous with an immersive home theater experience that renders every sound — from whip-fast dialogue to pulse-pounding explosions — with dramatic clarity and depth. But innovation never pauses at Sonos, and we’re excited to introduce the next chapter in cinematic sound. Meet Arc Ultra.

Arc Ultra is a complete reinvention of our best selling soundbar, with an all-new acoustic architecture that achieves immersive sound never before possible from a soundbar this sleek. Let’s explore the design and technological advancements that make Arc Ultra the new standard for home theater sound.

 extend even further than those of its predecessor, thanks to a total of 14 precisely-engineered speakers that span the full range of audio frequencies, from crisp highs to booming lows.

But these speakers don’t work all on their own. They’re nested within an entirely new acoustic architecture that makes Arc Ultra unlike any soundbar you’ve heard before. Let’s break it down.

 handle the full spectrum of higher-pitched sounds. Newly designed wave guides direct these high frequencies toward both sides of the room as well as upward to fill even more space in the room with sound. Six midwoofers contribute to a rich tapestry of mid-range and vocal frequencies, ensuring that dialogue cuts through the mix with crystal clarity, even at high volume levels.

Rounding out the array is a newly designed Sound Motion woofer, which marks a revolutionary leap forward for home theater sound. The use of Sound Motion technology in Arc Ultra is the key to unlocking the soundbar’s unique acoustic architecture, which delivers a bigger and more balanced sound experience in a slimmer design. The difference is especially prominent in Arc Ultra’s bass output, which far surpasses the previous generation while reducing the height and depth of the soundbar. This sleeker, smaller footprint is made possible by an innovative flat design featuring four distributed lightweight motors and voice coils with force-canceling dual cones in a single enclosure.

Here’s where you might stop to wonder about the furniture-rattling implications of a soundbar capable of such powerful bass response. But rest assured: the Sound Motion woofer unleashes its low frequencies with virtually no mechanical vibration, which keeps distortion to a minimum while contributing to a truly cinematic home theater experience.

We’ve completely updated the acoustic architecture while staying true to the beloved sleek design of Arc. In fact, Arc Ultra features an even sleeker footprint compared to its predecessor. All of the above speakers are precisely tuned to fit inside an slimmer enclosure that features an extended wraparound grille and a distinctive racetrack design that allows for sound to be fired across the room at all angles.

Every aspect of Arc Ultra is designed not just with looks, but also with sound in mind. Because the new enclosure fits more speakers — and positions these speakers in such a way that they accurately beam sound around the entire room — it renders a more complete 

 than has ever been available in a soundbar.

 and its ability to create an immersive, multidimensional soundstage. But it also owes to the unique design of Arc Ultra, which can render a 9.1.4 Dolby Atmos experience (nine ear-level channels, one subwoofer, and four height channels) without any additional speakers — a huge improvement from Arc’s already-impressive 5.0.2 experience. Add Arc Ultra to a setup that also features a pair of Sonos 

, and you have the ultimate in Dolby Atmos surround sound.

Finally, a note on size. Because space is at a premium in many home theater setups, we’ve also reduced the soundbar’s depth and height. A shallower depth makes for a more elegant and inconspicuous on-wall presence, which is more in line with newer television models. And a shorter height accounts for the ever-shrinking footprint of modern TV bezels, ensuring that a soundbar placed at the bottom of your screen doesn’t obstruct your view of the action.

The software and processing power on Arc Ultra are just as impressive as the hardware components. Additional features designed to improve your listening experience include:

. It’s not just the speakers that matter — it’s the space, too. Arc Ultra’s built-in software can measure how sound reflects off the objects and surfaces in your room, then tunes the soundbar to accommodate the space. In previous iterations, this feature was called Trueplay. Arc Ultra marks the debut of a faster, easier version of home theater Trueplay called 

, which will now be available not only to iOS users, but to Android users as well.

. Our popular Speech Enhancement feature now comes with multiple levels of control. This is a win for everyone who enjoys a more cinematic experience, but especially for those with hearing difficulties who have been forced to rely on subtitles in the past.

Among the key differences between Arc Ultra and Arc, perhaps none is more audible than the addition of Sound Motion technology, which delivers clear, booming bass frequencies with virtually no mechanical vibration.

But it’s not just about the low end. Sound Motion helps Arc Ultra deliver bigger and better sound across the full audio spectrum while shrinking the size and weight of the hardware required. This space-saving technology was key to outfitting Arc Ultra with a more immersive acoustic architecture that does justice to the entire range of audible frequencies. The updated soundbar boasts three different types of transducers — each one dedicated to high, mid, or low frequencies — to create a more balanced, natural sound that isn’t too heavily weighted in one direction.

Transparent view of Arc Ultra displaying Sound Motion technology

Sometimes, less really is more. This was one of the guiding design principles behind Arc Ultra, which consumes an estimated 20% less power than its predecessor when idle. And this principle goes down as far as the packaging, which uses less plastic overall as well as paper elements certified by the Forest Stewardship Council.

Arc Ultra’s smaller design is a big part of our push toward sustainability — though in ways that may not be obvious on first glance. For example, smaller packaging allows us to fit 264 more units on a single shipping container. Everything down to the soundbar’s physical construction is designed with sustainability in mind, which is why Arc Ultra is built with halogen-free PCB material widely considered to be less toxic than halogenated alternatives.

Experience sound like never before with Arc Ultra

The original Arc set a high bar for soundbars, delivering the type of spatial audio experience you’d expect from the theater. The new Arc Ultra clears that bar and then some, redefining what’s possible in a soundbar with its innovative acoustic architecture.

Put simply, Arc Ultra delivers on the promise implicit in its name and now stands as the top-of-the-line soundbar option for audiophiles and home theater enthusiasts. With a more spacious soundstage, clearer dialogue, and deeper bass (even at high volumes), this is a soundbar that’s easy to get worked up about. If you’re interested in adding Arc Ultra to your home theater setup, get in touch with a Sonos expert by 

Sand erupting from a black Arc Ultra with Dune 2 graphics

Introducing Arc Ultra - Our Most Innovative Soundbar Yet

At Sonos, we believe in delivering the best sound experience — seamlessly and reliably. But we fell short when our new app release didn’t meet the standards we promised. Since then, we’ve spent time listening to our customers and employees, learning from our mistakes, and taking action. Today, we’re announcing new commitments to show our renewed focus on software quality, customer experience, and delivering the excellence you deserve from Sonos.

We’re working to ensure we don’t just fix our mistakes but actively build a better Sonos experience for everyone. Many of these initiatives are already underway and others will be implemented through the remainder of the year.

These commitments focus on addressing the root causes of the app release issues and regaining the trust of our customers.

To deliver the highest level of customer experience, we will always establish ambitious quality benchmarks at the start of product development. We will not launch products until they meet these criteria. We will also enhance the tools needed to measure and maintain the standards our customers expect. 

Unwavering Focus on Customer Experience

Our beta testing program will include a broader range of customers and more diverse setups, helping us diagnose and resolve issues faster before going to market.

Increasing the Stringency of Pre-Launch Testing

In contrast to the all-at-once automated app release we issued in May, any major change to the Sonos app will be released gradually, allowing customers to adjust and provide feedback before it becomes the default. We will also provide customers the ability to opt in to test new features.

Approaching Change with Humility

We are creating a new role: Quality Ombudsperson. This person will ensure employees have a clear path to raise concerns regarding quality and customer experience. The ombudsperson will report directly to executive leadership, publish reports twice a year, and present regularly to the Sonos board of directors.

Appointing a Quality Ombudsperson

In addition, we are also committing to the following to begin to regain your trust: 

To reflect our strong belief in the quality of our products, we will extend the manufacturer’s warranty by an additional year for all home theater and plug-in speaker products currently under 

Extending Our Home Speaker Warranties

We will continue to roll out updated mobile software versions every 2-4 weeks to optimize and enhance the app experience, even after the current issues are fully resolved.

Relentless App Improvement

We will form a Customer Advisory Board to ensure we never lose sight of our customers' voices. This board will provide feedback and insights from a customer perspective to help shape and improve our software and products before they are launched.

Establishing a Customer Advisory Board

As a demonstration of the significance of these commitments,

 the Sonos Executive Leadership Team will not accept any annual bonus payout for the October 2024 - September 2025 fiscal year unless the company succeeds in improving the quality of the app experience and rebuilding customer trust.

Sonos sign above plants at front reception desk of Sonos office

Since May, the Sonos team has been working diligently to release new software updates approximately every two weeks and rapidly roll out new features and meaningful improvements and fixes.

More than 80% of the app’s missing features have been reintroduced and the company expects to have almost 100% restored in the coming weeks.

share detailed notes on what we’ve addressed

 and what we are working on next through our 

. To track our progress, you can stay updated on specific improvements via the 

Sonos App Improvement and Bug Tracker on Trello

Sonos user holding their phone using the Sonos app to control a white Era 100 speaker

We are committed to making Sonos better than ever, and these commitments are just the beginning of that journey. Thank you for being a part of the Sonos community.

Sonos user in a yellow sweater lying on a blue blanket enjoying the sound of a Roam 2 portable speaker

Recommitting to Quality and Customer Experience

When shopping for a speaker or soundbar, you might encounter some words that sound more comical than technical. A tweeter? A woofer? What do birds and dogs have to do with producing a well-balanced sound experience?

As it turns out, these names are quite helpful in describing the function and sounds produced by the different components within a typical speaker enclosure. A tweeter is indeed like a bird, in the sense that it is small and designed to produce high-frequency sounds. Compare this to a woofer, which is bigger and produces deeper sound frequencies in the range of, say, a barking dog.

In this guide, we’ll focus on tweeters and the crisp, high end of the sonic range. These small but mighty pieces of hardware can fill a room with dazzling vocals, lead instruments, and other frequencies stretching toward the uppermost limits of audible sound.

In simplest terms, a tweeter is the part of a speaker responsible for producing higher-pitched sounds. Tweeters are specially designed to reproduce the higher frequencies of an electrical audio signal — and the higher the frequency, the higher the pitch you hear in your music.

Though different types of tweeters can be tuned to produce narrower ranges of audio frequencies, tweeters as a group typically produce frequencies within the range of 

. Hertz refers to the number of vibrations that occur in one second, and faster vibration speeds correspond to higher-frequency sounds. High-pitched vocals, crashing cymbals, and guitar solos are examples of sounds that fall within the lower end of a tweeter’s range (2,000 Hz). The higher end of the range (20,000 Hz) is associated with sounds that are barely even audible to humans, like dog whistles.

Tweeters are almost always the smallest speakers in an audio setup. Their small size is an important quality, as it correlates with the types of sounds they can accurately produce. Why? Because to produce these high-frequency noises, a speaker must be able to vibrate at rapid speeds. This is an easier job for smaller speakers like tweeters, which have a smaller surface area, lower mass, and other physical characteristics that allow the tweeter to move back and forth more freely. This back-and-forth vibration is essentially what produces sound, and faster vibrations translate to higher-pitched sounds.

Though you may have been unaware of their existence until just a moment ago, tweeters play an important role in most speaker setups. They’re built into the enclosures of many 

, where they’re responsible for reproducing the mid- and high-frequency sounds that cut through the audio mix — think vocals, lead instruments, and stirring string arrangements. In a home theater speaker, tweeters handle many of the audio frequencies associated with 

And, just as birds often sing in chorus, tweeters often work together to reproduce a particularly rich composition of higher frequencies. A speaker enclosure may house multiple tweeters, each of which serves a different role. Sometimes, the role a tweeter plays in a speaker configuration will determine its shape. A classical dome-shaped tweeter can produce a wide- and well-balanced range of sounds, while a directional horn-shaped tweeter can fire sounds into specific parts of a room to bring 

White Arc Ultra wall mounted underneath a television

Person putting a record on a turntable, placed next to a white Era 300

How many tweeters should I look for in a speaker?

There’s no “magic number” of tweeters that translates to 

. The number of tweeters in a speaker depends on the type of speaker, its shape, and its intended use.

 includes four tweeters that work together to produce high and mid-range frequencies. A forward-firing dome-shaped tweeter creates a round and smooth center image, while two side-firing tweeters create stereo separation. A fourth, horn-shaped tweeter is tilted upward to fire sound off the ceiling while playing 

 — ​​adding the extra dimension of height.

Other speakers can achieve a similarly impressive performance with a different configuration. A cluster of seven tweeters in 

, for example, projects high frequencies toward the listener, the sides of the room, and ceiling for a beyond immersive home theater experience.

In any case, keep in mind that the number of tweeters isn’t the only factor to consider. Other factors — like the shape and size of the tweeter and how it’s angled relative to the speaker’s other components — also play a role.

Of course, a speaker setup should be able to reproduce sound evenly across a wide band of audio frequencies — not just the mids and highs. For the spectrum of frequencies below 2,000 Hz, tweeters won’t cut it. Such frequencies require larger components designed to handle lower speeds of vibration.

Speakers that handle the broad middle range of audio frequencies (typically between 20 Hz and 2,000 Hz) are called 

. Woofers are generally at least several inches larger than tweeters, and their bigger size corresponds with deeper and heavier sounds.

Unlike tweeters, woofers often require a large-ish external housing. This has to do with the nature of producing lower frequency sounds, which requires moving a larger volume of air back and forth. Without more space to displace air efficiently, the sound waves a woofer produces can be compressed and distorted.

 comprises both tweeters and woofers, which work in a synchronized fashion to reproduce sound as clearly and as accurately as possible. Reproducing sounds on the lowest end of the audible frequency spectrum — around 20 Hz to 120 Hz — typically requires a third type of speaker known as a 

 are often housed in separate enclosures better suited to limiting distortion and enhancing the depth and richness of bass sounds.

Experience higher highs and lower lows with Sonos

A Sonos sound system can faithfully reproduce sounds across the entire band of human hearing — from the booming low end of an explosion to the crisp pop of a snare drum. 

 speakers feature precision-tuned speaker configurations that seamlessly blend high, mid, and low frequencies into a unified sound experience. And woofers such as 

 bring bold bass to your home theater setup in a size that won’t crowd out your other components. If you have any questions or need help selecting a speaker, get in touch with a Sonos expert by 

Person lounging while listening to a black Five & Sub

What Are Speaker Tweeters (And What Do They Do?)

No one will ever accuse a subwoofer of being too shy. Designed to handle the lowest frequencies of audio in movies and music, these loudspeakers literally make their presence felt with every bass-filled rumble and roar. Even so, few subwoofers have ever packed a punch in such a style as of the latest upgrade to the Sonos home theater experience: Sub 4.

If you’re chasing a more cinematic sound experience that does real justice to the rumbles and roars sitting at the lowest end of the audio mix, our newest subwoofer is the fastest way to get there. It has everything fans loved about its best-selling predecessor, 

 — with a few subtle updates. Most notably, Sub 4 better complements with our current portfolio’s blend of peak performance and attractive design, thanks to its improved processing power and a matte finish that it now shares with the other speakers in our lineup.

Fans of Sonos subwoofers will appreciate that Sub 4 still delivers bass you can feel in your entire body. What’s more, it’s as easy as ever to set up and use, with the option to stand it upright or lay it on its side depending on your desired aesthetic configuration.

Sub 4 features a more powerful CPU than the previous generation. This allows it to communicate efficiently and effectively with the other components in your 

 — and, ultimately, to deliver an incredible sense of depth and dimension across the lowest frequency sounds in an audio mix.

Of course, we built Sub 4 with not only power but also longevity in mind. Rest assured that it will be capable of receiving the latest software updates and features from Sonos for years to come.

At first glance, the visual updates to Sub 4 may appear subtle. The biggest update is an all-new matte finish available in both black and white. This stands in contrast to the high-gloss finish of the previous generation, which was unique in the Sonos lineup and may have disrupted the aesthetic continuity of a full speaker setup. In any case, you’ll likely find Sub 4 to be a slightly more understated addition to your home theater system.

Black Five placed on a table with a black Sub 4 placed on the floor next to it

As noted above, Sub 4 combines the best of the old and new. Some things made sense to carry over from Sub Gen 3. Industry-leading bass? Check. Iconic design? Check. Perhaps the most relevant continuation is the overall acoustic architecture, which is part of what allows for Sub 4’s backwards compatibility with previous subwoofer generations.

But Sub 4 isn’t only interested in looking backwards. On the contrary, its considerably upgraded processing power and evolving design puts a firm focus on the future. If you’re interested in comparing our latest subwoofer generation with previous iterations, check out our 

 for a more detailed breakdown of tech specs.

Experience bass like never before with Sub 4

Is there such a thing as a surround sound system without a premium subwoofer to handle the pulse-pounding bass frequencies? Technically, yes, but nothing can add oomph to your 

 quite like Sub 4. If you’re interested in adding Sub 4 to your home theater setup, get in touch with a Sonos expert by 

White Sub 4 placed on the floor underneath a wall mounted white Arc Ultra

Introducing Sub 4 - Our Latest Subwoofer

If you’re ready to create a pitch-perfect vibe for your business, 

 can help you get there — and sooner than you might think. A Sonos Pro subscription comes with everything your business needs to sound great, even if your existing sound system isn’t outfitted with Sonos wireless speakers.

You can make virtually any sound system Sonos-compatible in just a few steps. If you don’t have Sonos wireless speakers, or if your system mixes and matches Sonos speakers with wired audio equipment, you’ll need to add 

 to connect all of your components. Once you’re set up, you can easily expand your sound system by adding new Sonos hardware.

Does Sonos Pro work with a non-Sonos sound system?

Sonos Pro requires a Sonos-compatible system to work, but this is easier to achieve than you might think. It certainly does 

 require replacing all of your existing speakers and audio equipment with Sonos hardware. All you’ll need is a system that can be connected with the Sonos app.

There are a few ways to make your sound system Sonos-compatible.

 to the Sonos app directly over WiFi. If you have multiple Sonos speakers or components, you can create a system by grouping them all together in the app.

You can also connect a non-Sonos amplifier or receiver to the Sonos app via 

, a device that allows you to seamlessly incorporate wired speakers into your Sonos system. For business owners who want to get started with Sonos Pro right away but lack existing Sonos hardware, this is an easy and cost-effective option.

Is Port the only Sonos device I need to set up Sonos Pro?

In most cases, yes. Port connects directly to the wired amplifier or receiver that powers your existing sound system. Once you’ve connected Port, you can create a new Sonos system over WiFi and — boom — you’re ready to get started with Sonos Pro.

One caveat: Port cannot power audio equipment on its own. This shouldn’t be a problem if you’re connecting Port to your existing sound system, which should already include a 

 or receiver. But if you’re creating a system and only have 

, such as in-wall or in-ceiling speakers, you’ll need 

Amp basically works the same way as Port, but, as an amplifier, it can power your audio equipment.

Black One on a shelf above a coffee machine

Person using a tablet to play music on a black Five

How to make your existing sound system compatible with Sonos Pro

In this step-by-step guide, we’ll assume that you already have existing speakers and hardware that fit your retail situation. If you don’t, you can get in touch with a Sonos expert by 

. We can help you select the wireless speakers and hardware you need to 

set up a Sonos system in your retail store

1. Connect Sonos Port to your existing audio equipment

Port is the easiest way to connect your hardwired audio components to a Sonos system. If you need help with installation, you can 

If you have multiple business locations, you’ll need a separate Port for each business location. This allows you to connect your local speakers to Port via a wired connection. Then, once you’re 

 all of your locations from a single dashboard.

Alternatively, you can create a Sonos system with a wireless speaker such as 

. These options will sound great on their own or paired with other Sonos speakers, but they won’t connect to your existing hardware.

You’re now ready to get started with Sonos Pro. We designed Sonos Pro to scale with your business. With 

 to choose from, you can focus on improving your customer experience and boosting productivity or fine-tuning your brand across a wide range of locations.

 ($35/month per location) includes everything you need to get started, from 

 by independent artists to priority support whenever you need it. Other features include scheduled and automated playlists, volume limits, admin and access control, and the ability to curate your own approved music library.

 ($70/month per location) takes the brand experience to the next level. It includes everything you get with Essential, plus hundreds of stations with commercially licensed music by the top artists you know and love.

 and get started with Sonos Pro. Once you’re connected, you’ll be ready to stream and manage the music at all of your business locations from a single dashboard.

3. Add Sonos wireless speakers to your system over time

Now that you’re set up with Sonos Pro, you can add new Sonos speakers to your system as your business grows and needs evolve. It’s easy to add new Sonos hardware to your system via the 

 In fact, it’s the same way you initially set up Port — simply go to the 

This flexibility may prove especially useful as you expand your business to new stores or locations. With our 

, you can pick out Sonos products that fit the specific layout and requirements of your new locations.

Person preparing food below a white, wall-mounted One

Sonos Pro is a sound solution that scales with your business

If you’ve been unsure of whether you have the components necessary to get started with Sonos Pro, we hope we’ve set your mind at ease. With just one additional device, you can make your system Sonos-compatible and elevate your business’s sound experience today.

But our support doesn’t stop with setting up your Sonos Pro subscription. On top of music and controls that deliver a 

 across all of your locations, you’ll get access to priority support that can help you ensure best-in-class experience that will keep your customers coming back for more.

 to get started. If you’re not sure which plan is best, your business might benefit from a more custom Sonos Pro solution. 

Submit your information via our online form

, and a Sonos expert will get in touch to guide you through the process.

*Sonos Pro is only available in certain territories.

Two people using the Sonos app on a tablet to play music on a wall mounted black Five

Music for Business: How To Upgrade Any Speaker Into a Sonos System for Sonos Pro

Though some listeners prefer their shelves of vinyl and stacks of CDs, most music libraries now exist in digital file formats that are more convenient to store and easier to access on the go. But it’s not particularly helpful to simply describe an audio file format as “digital” because that can mean different things — and different levels of sound quality. Audio files in fact come in multiple formats, and not all of these formats are made equal.

Introducing Arc Ultra - Our Most Innovative Soundbar Yet

Recommitting to Quality and Customer Experience

What Are Speaker Tweeters (And What Do They Do?)

Introducing Sub 4 - Our Latest Subwoofer

Music for Business: How To Upgrade Any Speaker Into a Sonos System for Sonos Pro

Beginner's Guide to Audio File Types (And Which to Use)

What Is Lossless Audio — And How To Stream It at Home

Update on the Sonos app from Patrick

What Is a Speaker Amplifier (And Do You Need One)?

How to Hear Dialogue Better When Watching TV Shows and Movies

The Ultimate Guide to Wearing Headphones

Things To Consider When Choosing New Headphones

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Introducing Arc Ultra - Our Most Innovative Soundbar Yet

.css-4c3m2r{color:#ffffff;-webkit-text-decoration:none;text-decoration:none;}What Are Speaker Tweeters (And What Do They Do?)

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