Sonos Sub 4 Wireless Subwoofer Review

There’s nothing quite as frustrating as settling down for a movie or your favourite album, only for the audio to fall flat, lacking the depth and punch that brings it to life. I used to face this exact issue, with my home entertainment system feeling incomplete, especially when it came to those crucial low frequencies. A truly immersive experience simply wasn’t possible without a robust bass foundation. This problem significantly diminished the impact of everything I watched or listened to, and it became clear that investing in a quality solution, specifically a powerful Sonos Sub 4 – Wireless Subwoofer – White, would dramatically elevate my entire setup.

Navigating the Soundscape: What to Consider Before Buying a Subwoofer

A dedicated subwoofer is the cornerstone of any truly engaging audio setup, designed to handle the lowest frequencies that most standard speakers struggle to reproduce. For anyone looking to transform their home cinema or music listening experience from merely audible to truly sensational, a subwoofer is essential. It fills out the sound, adding impact to explosions in movies and depth to basslines in music, pulling you deeper into the content.

The ideal customer for a premium subwoofer like the Sonos Sub 4 is someone who appreciates high-fidelity audio, already has or plans to invest in a quality soundbar or speaker system (especially a Sonos one), and desires that cinematic rumble and rich musical bass that standard setups simply cannot deliver. They likely value seamless integration, elegant design, and powerful, distortion-free performance. This product is perfect for movie enthusiasts, serious music lovers, and those building a comprehensive smart home audio ecosystem.

Conversely, if you’re someone who primarily listens to podcasts, prioritises absolute silence, or is highly sensitive to bass, a high-power subwoofer might be overkill. Similarly, if you live in a small flat with very close neighbours, you might find yourself constantly adjusting the volume to avoid complaints, making a less powerful, more compact solution or simply relying on a soundbar’s integrated bass a more suitable option. For those on a tight budget or not already invested in the Sonos ecosystem, alternative brands might offer more flexibility.

Before buying, consider:
* Connectivity: Do you need wired or wireless integration? Wireless offers more placement flexibility.
* Compatibility: Will it work seamlessly with your existing audio system? Some brands, like Sonos, operate within their own ecosystem.
* Size and Placement: Do you have the physical space for the subwoofer, and can it be positioned optimally in your room?
* Power and Room Size: Is the subwoofer powerful enough for your room, but not so overpowering that it causes rattles or disturbs others?
* Aesthetics: Does its design fit with your home décor?
* Budget: High-end subwoofers are an investment; ensure it aligns with what you’re willing to spend for the audio upgrade.

Unveiling the Sonos Sub 4: A Deep Dive

The Sonos Sub 4 – Wireless Subwoofer – White is Sonos’s latest offering in the premium subwoofer category, designed to deliver pulse-pounding bass and an immersive audio experience. It promises to fill every inch of your room with deep, precise sound, thanks to its all-new acoustic architecture with Sound Motion technology. When you purchase the Sub 4, you receive the wireless subwoofer itself and a power cable, ready for a straightforward setup. While Sonos has always been a leader in wireless home audio, the Sub 4 builds on the legacy of its predecessors, offering enhanced acoustics and a more refined design compared to the Sub 3, aiming to further cement Sonos’s position in the premium segment. It doesn’t necessarily compare to a singular “market leader” as much as it competes within the high-end wireless multi-room audio market, where Sonos itself is often seen as a benchmark.

This specific subwoofer is tailor-made for existing Sonos users looking to dramatically upgrade their home theatre or music setup. It’s particularly recommended for pairing with a Sonos soundbar like the Arc or Beam, or especially the new Arc Ultra, to unlock true spatial audio experiences. It’s for those who crave deep, undistorted bass and are willing to invest in a cohesive, high-performance audio ecosystem. It’s not for someone seeking a standalone subwoofer for a non-Sonos system, or for those who just need a basic bass boost without the premium features and integration offered by Sonos.

Here’s a quick rundown of its pros and cons:

Pros:
* Exceptional Bass Performance: Delivers deep, powerful, and clean bass with virtually no distortion.
* Seamless Sonos Integration: Effortlessly connects and works flawlessly within the Sonos ecosystem.
* Elegant and Versatile Design: Sleek, modern aesthetic with dual orientation (horizontal or vertical) to fit any room.
* Effortless Setup and Control: Simple plug-and-play setup via the Sonos app and intuitive control options.
* Vibration-Free Operation: Force-cancelling drivers ensure solid performance without cabinet rattle.

Cons:
* Premium Price Point: It’s a significant investment, making it inaccessible for some budgets.
* Sonos Ecosystem Locked: Only compatible with other Sonos devices, limiting its use with non-Sonos gear.
* Potential Overkill for Smaller Spaces: Its immense power might be excessive in very small rooms or for sensitive neighbours.
* Arc Ultra’s Already Strong Bass: For some, the Arc Ultra’s native bass might already be sufficient, making the Sub 4 a harder sell.

Key Attributes and Their Advantages

Having spent considerable time with the Sonos Sub 4 – Wireless Subwoofer – White, I can confidently say it’s more than just an add-on; it’s a transformative component for any Sonos home audio system. Let’s delve into the features that truly make it shine.

All-New Acoustic Architecture with Sound Motion Technology
This isn’t just a fancy phrase; it’s the core of what makes the Sonos Sub 4 so impressive. From the moment I first hooked it up, the difference was palpable. The acoustic architecture, combined with Sound Motion technology, truly delivers on its promise to fill every inch of the room. Instead of just hearing bass from a specific direction, the low frequencies seem to emanate from all around you, creating a truly immersive envelope of sound. This precise placement of sounds is crucial for both movies and music, ensuring that explosions have a visceral impact and basslines are not just heard, but felt throughout the room. The benefit here is a more cohesive and natural soundstage, where the subwoofer seamlessly integrates with your other Sonos speakers rather than standing out as a separate component.

Unparalleled 9.1.4 Spatial Audio Experience with Dolby Atmos
While the Sub 4 is a subwoofer, its contribution to a full 9.1.4 spatial audio experience, especially when paired with a compatible soundbar like the Sonos Arc Ultra, is immense. Dolby Atmos content truly shines. The deep, rumbling bass anchors the entire sound field, allowing the overhead and surround effects to feel more distinct and impactful. I’ve re-watched several action films and concert videos, and the sense of depth and scale that the Sonos Sub 4 – Wireless Subwoofer – White adds to Dolby Atmos tracks is astounding. It’s not just about loudness; it’s about the texture and detail in the low end that brings a new layer of realism to the spatial audio.

Ultraclear Dialogue and Speech Enhancement
You might wonder how a subwoofer contributes to dialogue clarity. It’s all about balance. With the Sub 4 handling the dedicated low frequencies, your soundbar (like the Arc Ultra) can focus its power on mid-range and high-end reproduction, which includes dialogue. This separation of duties prevents the soundbar from being overworked, allowing it to deliver voices with greater precision. Furthermore, the Sub 4’s ability to provide a clean, undistorted bass foundation means that the low-end doesn’t bleed into or muddy the vocal frequencies. The result is consistently clear dialogue, even during the most chaotic action sequences, which is invaluable for enjoying movies and TV shows without constantly reaching for the remote.

Elegant Design and Versatile Placement
Visually, the Sub 4 is a triumph. Its elegant, minimalist design means it looks great in any home environment and, crucially, won’t distract from your entertainment. The smooth, matte white finish (or black, depending on your choice) feels premium and blends in beautifully. What I particularly appreciate is its dual orientation capability – you can stand it upright or lay it on its side, making it incredibly versatile for placement under a sofa, next to a TV console, or tucked away in a corner. This flexibility ensures you can find the optimal position for both aesthetics and acoustic performance without compromise. The plastic material, while not metal, feels robust and well-constructed, contributing to its premium feel and solid build quality.

Multiple Control Options for Ultimate Convenience
Sonos has always excelled at user experience, and the Sub 4 continues this tradition. Controlling the subwoofer is incredibly convenient. I can adjust its volume and bass levels directly through the Sonos app, which offers granular control over the sound profile. It also responds to your TV remote, eliminating the need for multiple controllers. For quick adjustments, the touch controls on the unit itself are responsive and discreet. Furthermore, integration with Sonos Voice Control and Amazon Alexa² means you can simply use your voice to command your audio, adding another layer of effortless interaction. This multi-faceted control system ensures that adjusting your bass experience is always quick and intuitive.

Effortless Setup with HDMI eARC and Sonos App Guidance
Setting up the Sonos Sub 4 is remarkably simple, living up to the Sonos promise of ease of use. It involves a single HDMI eARC connection to your TV (when paired with a compatible soundbar), and then the Sonos app takes over with step-by-step guidance. Seriously, it’s plug-and-play in the truest sense. I’ve had experiences with other audio systems where setup felt like a chore, but with the Sub 4, it was genuinely effortless. The app guides you through pairing it with your existing Sonos system, and within minutes, you’re ready to experience enhanced audio. This simplicity means less time fiddling with wires and settings, and more time enjoying your content.

Quickly Fine-Tuning Sound with Trueplay
Once setup, the Trueplay tuning feature is a game-changer. Every room has unique acoustic properties, and Trueplay uses your phone’s microphone to analyse how sound reflects off surfaces in your room. It then customises the EQ settings of the Sub 4 (and your entire Sonos system) to ensure the sound is perfectly optimised for your specific environment. The process is quick and makes a noticeable difference, eliminating boomy spots or weak bass, and instead delivering a balanced and refined sound profile. This intelligent calibration ensures you’re always getting the best possible performance from your wireless subwoofer.

Versatile Music Streaming Capabilities
Beyond its home theatre prowess, the Sonos Sub 4 also significantly enhances your music listening experience. With built-in WiFi, Bluetooth, Apple AirPlay 2, and Spotify Connect, it offers a multitude of ways to stream your favourite tunes. The deep, rich bass it provides makes music sound incredibly full and dynamic. Whether it’s the thumping beat of an electronic track or the subtle resonance of a double bass in jazz, the Sub 4 renders it with superb clarity and impact. The wireless connectivity ensures a stable connection for high-quality audio streaming from any compatible device, turning your living room into a concert hall.

Expanding Your Sonos Home System
The true power of Sonos lies in its expandability, and the Sonos Sub 4 – Wireless Subwoofer – White is a perfect example of this. You can easily add more Sonos speakers to other rooms to create a whole-home audio system. For the ultimate surround sound experience with Dolby Atmos, Sonos recommends pairing the Sub 4 with the Arc Ultra soundbar and a pair of Era 300 rear speakers. I can attest to this combination delivering an unparalleled, cinematic audio experience that truly blurs the line between home and professional theatre. The ability to build out your system over time, adding components as your needs or budget allow, is a significant benefit.

Robust Wireless Connectivity
The Sub 4 relies primarily on Wi-Fi connectivity, supporting 5GHz for a stable and high-bandwidth connection. Unlike some previous Sonos devices or even my initial Arc Ultra setup which had some minor hiccups during connection, the Sub 4 connected flawlessly on the first attempt. This reliable wireless performance is crucial for maintaining synchronisation with other speakers and ensuring an uninterrupted audio stream, whether for movies or music. The absence of a tangle of cables is a huge bonus, contributing to the clean aesthetic and flexible placement options.

In conclusion, every feature of the Sonos Sub 4 is designed to enhance your audio experience, from its groundbreaking acoustic design to its seamless integration within the Sonos ecosystem. It’s a premium product that justifies its price through exceptional performance, thoughtful design, and unparalleled user convenience.

Voices from the Community: User Experiences

Having scoured the internet, I’ve found that many users echo my positive sentiments regarding this device. Owners consistently praise the impressive performance of the wireless subwoofer. Many highlight its powerful yet incredibly stable bass output, noting that it delivers a cinematic “rumble and effects” without any unwanted vibrations or distortion. The easy, almost instantaneous setup via the Sonos app is frequently mentioned as a major plus. There’s a strong consensus that when paired with a Sonos Arc Ultra, the system creates a truly premium home cinema experience, making explosions and low-end effects feel genuinely impactful, transforming regular movie nights into something spectacular. While some acknowledge the investment, the general feeling is that the improved sound quality and seamless integration make the Sonos Sub 4 a worthwhile upgrade for discerning audio enthusiasts.

Final Verdict: Elevating Your Home Entertainment

The problem of flat, unengaging home audio systems is a common one, leaving many feeling disconnected from their movies and music. Without that foundational bass, content lacks the emotional impact and immersive depth it deserves, leading to a less satisfying entertainment experience overall. The Sonos Sub 4 – Wireless Subwoofer – White is an exceptional solution to this problem. Its all-new acoustic architecture fills the room with precise, deep bass, making every explosion felt and every musical note resonate. Furthermore, its seamless integration into the Sonos ecosystem means effortless setup and control, ensuring a premium experience without any hassle. Finally, the elegant design and vibration-free performance mean you get powerful audio without compromising on aesthetics or worrying about distracting rattles. To truly transform your home audio, you won’t regret adding this remarkable subwoofer. Click here to check the Sonos Sub 4 out and elevate your entertainment.