Sonos Sub 4 Review 2026 | Price, Specs & Verdict | ProAudio Video

⭐ Expert Review 2026

Sonos Sub 4 Wireless Subwoofer (Black)

★★★★☆

₹74,900

Deep, distortion-free bass down to 25 Hz with force-cancelling drivers and Wi-Fi 6, built to supercharge any Sonos home theatre in India.

🛒 Buy Now — Best Price in India

The Sonos Sub 4 is a premium wireless subwoofer designed to add deep, room-filling, distortion-free bass to a Sonos home theatre system, and in India it sells for ₹74,900. It is the fourth-generation version of Sonos’s flagship subwoofer, built around two force-cancelling drivers that fire inward towards each other to eliminate cabinet rattle and vibration while pushing clean low frequencies down to 25 Hz. For this generation Sonos has kept the acclaimed acoustic design intact and focused on future-proofing the electronics, adding a faster quad-core processor, double the memory and a new Wi-Fi 6 radio for more reliable wireless performance. The result is a subwoofer that pairs effortlessly with Sonos soundbars like the Arc and Beam, or with Sonos speakers, to deliver cinematic impact for movies and physical, textured bass for music. For anyone building a serious Sonos setup in India in 2026, the Sub 4 is the definitive low-end upgrade.

This subwoofer is aimed at home-cinema enthusiasts and music lovers who already own or plan to own a Sonos soundbar or speaker and want to feel their content, not just hear it. If you value clean, powerful, well-controlled bass, a striking sculptural design and the simplicity of the Sonos app, the Sub 4 makes a compelling case. It is a particularly smart pick for Indian buyers investing in a long-term wireless home theatre, because the upgraded processor and Wi-Fi 6 radio help keep it compatible and reliable for years to come.

Sound Quality & Performance

Bass performance is the entire point of the Sonos Sub 4, and it delivers with authority. The heart of the design is a pair of force-cancelling drivers — two elliptical woofers mounted face-to-face inside the sealed cabinet so their opposing motion cancels out vibration. In practice this means the Sub 4 can move a lot of air and hit hard without the box buzzing, shifting on the floor or muddying the sound. Low-frequency extension reaches down to 25 Hz, so explosions, rumbles and cinematic effects land with genuine physical weight you feel in your chest, while music bass lines stay tight, tuneful and textured rather than boomy. Driven by dual Class-D digital amplifiers and tuned automatically when it joins your Sonos system, the Sub 4 blends seamlessly with a soundbar such as the Sonos Arc or Beam, taking the strain off the smaller speakers so the whole system sounds cleaner and louder. Sonos also lets you fine-tune the subwoofer level in the app, and Trueplay tuning (on supported devices) adapts the output to your room. For movies, gaming and bass-heavy music in a medium-to-large Indian living room, the Sub 4 is superb.

Build Quality & Design

The Sonos Sub 4 is as much a design object as an audio component. Its instantly recognisable sculptural form — a solid slab with an open central cut-out where the force-cancelling drivers face each other — looks unlike any conventional subwoofer and works standing upright or lying flat to slide under furniture. The finish on this Black variant is a clean matte that resists fingerprints and blends into a modern living space. Build quality is excellent and appropriately substantial: at roughly 16.5 kg the Sub 4 feels dense and inert, which is exactly what you want from a subwoofer, since that mass and rigidity help keep the cabinet silent while the drivers do their work. There are no fiddly controls on the unit itself; everything is handled wirelessly through the Sonos app, keeping the exterior clean. The only physical connections are a power inlet and an Ethernet port for a wired network option. It is a premium, beautifully engineered piece of hardware that justifies its shelf presence.

Features & Connectivity

The Sub 4’s headline changes over the previous generation are all about connectivity and longevity. It adds a Wi-Fi 6 radio for a more robust, lower-latency wireless link to the rest of your Sonos system, along with a faster quad-core processor and double the onboard memory (512MB), which helps ensure the subwoofer keeps receiving software features and updates well into the future. Setup is genuinely effortless: you add the Sub 4 to your Sonos app, bond it to a compatible soundbar or speaker, and the system handles crossover and tuning automatically. It also draws up to 50% less power at idle than earlier models, a welcome efficiency gain for a device that stays powered all day. The trade-off, and it is an important one, is that the Sub 4 is strictly a Sonos-ecosystem product: it has no line-in and cannot be used as a standalone subwoofer with a non-Sonos amplifier or AV receiver. You will need a Sonos soundbar (Arc, Arc Ultra, Beam, Ray) or supported Sonos speakers for it to work. Within that world, though, the experience is polished and reliable, backed by a 1-year warranty in India.

Value for Money in India 2026

At ₹74,900 the Sonos Sub 4 is a premium purchase, and its value depends entirely on your setup. If you already own or are building a Sonos home theatre, it is the best and most seamless way to add serious, cinema-grade bass, and the upgraded Wi-Fi 6 electronics make it the smarter long-term buy over the outgoing Sub (Gen 3). If you want to spend less, the smaller Sonos Sub Mini (around ₹48,999) covers compact rooms and speaker pairings at a lower price, though it cannot match the Sub 4’s output or extension. Buyers outside the Sonos ecosystem can find traditional powered subwoofers with a line-in for less money, but they lose the wireless simplicity and automatic tuning that make the Sub 4 special. For committed Sonos owners in India in 2026 who want the definitive low end, the Sub 4 earns its price.

Full Technical Specifications

Who Should Buy the Sonos Sub 4?

✅ Buy it if you: already own or are building a Sonos home theatre with a soundbar like the Arc or Beam; want deep, clean, cinema-grade bass down to 25 Hz; value effortless wireless setup and app tuning; and want the most future-proof Sonos subwoofer thanks to Wi-Fi 6 and a faster processor.

❌ Skip it if you: do not use Sonos and want a standalone subwoofer with a line-in; already own the Sub (Gen 3), which sounds virtually identical; or have a small room where the more affordable Sub Mini would be plenty.