Feel the boom in your chest with this superb Sonos Sub 4 deal, perfect for any home cinema
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If you’re looking for a powerful subwoofer to bring that rich, deep bass when watching movies, the Sonos Sub 4 makes a great upgrade for compatible Sonos home-theater systems. It uses dual force-canceling woofers, a ported enclosure, and dedicated low-frequency processing to add significantly greater depth and physical impact than a soundbar can produce alone. Its wireless Wi-Fi connection, flexible vertical or horizontal placement, simple app-based configuration, and compatibility with Arc Ultra, Arc, and Beam make integration considerably easier than with a traditional wired subwoofer. It is most compelling for existing Sonos users who want more cinematic movie effects, stronger gaming impact, and fuller music reproduction without abandoning the simplicity of the Sonos ecosystem. Grab it now and save $140 off the MSRP!
The fundamental advantage of adding a dedicated subwoofer is driver size and acoustic specialization. Small speakers can reproduce some bass, but producing deep low frequencies requires moving relatively large quantities of air. A dedicated subwoofer uses larger drivers and an enclosure optimized specifically for this task, allowing it to reproduce bass with greater depth and output than compact speakers or soundbars.
Read below for more information on the various specifications we like, or see the boot of this page for alternative offers on soundbars and speakers.
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Prices correct as of October 9th, 2026.
What we like about this Sonos Sub 4
Dual force-canceling woofers
The Sonos Sub 4 uses two inward-facing, Sonos-engineered woofers arranged in a force-canceling configuration. By positioning the drivers opposite one another, much of the mechanical vibration generated by one woofer is counteracted by the other, helping the enclosure remain stable while reducing unwanted buzzing, rattling, and cabinet resonance.
Deep, dynamic low-frequency output
The Sub 4 is designed specifically to take over the lowest frequencies from a Sonos soundbar or speaker system. This gives films, games, and music greater physical impact while also reducing the bass workload placed on the main speakers, allowing them to concentrate more effectively on dialogue, effects, and midrange detail.
Ported enclosure design
Its ported cabinet is intended to reinforce low-frequency output and improve bass efficiency. Rather than relying solely on the movement of the drivers themselves, the enclosure and port system work together to increase acoustic output in the bass region.
Wireless Sonos integration
The Sub 4 connects to compatible Sonos products over Wi-Fi, avoiding the need to run a dedicated signal cable across the room. Only mains power is required at the subwoofer itself, giving users considerably more flexibility when choosing where to place it.
Broad soundbar compatibility
It can be paired with Sonos Arc Ultra, Arc, and Beam soundbars, making it suitable for both compact and high-end Sonos home-theater systems. Users can therefore add substantially deeper bass without replacing their existing soundbar.
Flexible upright or horizontal placement
The relatively slim enclosure can stand vertically in the room or be laid horizontally, allowing it to fit beneath certain sofas or other furniture. This flexibility is useful because subwoofer placement can have a significant effect on perceived bass response.
Dual-subwoofer expansion
Two Sub 4 units can be paired with compatible Arc-series systems for users who want more evenly distributed and more powerful low-frequency performance. Dual subs can be particularly beneficial in larger rooms where a single subwoofer creates noticeable differences in bass level between seating positions.
Who should buy this Sonos Sub 4 deal?
The Sonos Sub 4 is aimed at users who already own, or plan to build, a Sonos home-theater system and want substantially stronger bass than a soundbar can provide on its own. It is particularly appropriate for film and gaming setups using the Arc Ultra, Arc, or Beam. Explosions, vehicle engines, cinematic scores, and other low-frequency effects gain considerably more physical presence when reproduced by a dedicated subwoofer rather than small soundbar drivers. Music listeners can also benefit, especially with bass-heavy electronic, hip-hop, rock, and orchestral material. However, its greatest value comes from integration rather than operation as a conventional standalone subwoofer, so it makes the most sense inside the Sonos ecosystem.
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