If your soundbar feels a little thin on low end, this Sub 4 Amazon deal could be the upgrade worth making
Updated: May 26, 2026 12:32 pm
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Sonos makes great soundbars, but to get that full home-theater rumble, you need a proper subwoofer. The Sub 4 is the company’s latest wireless sub, and right now Amazon has it marked down to one of its better prices. The normal price is $899, but you can pick it up for $759 on Amazon and save $140.
Prices and savings subject to change. Click through to get the current deal prices.
SAVE 16% NOW!
Sonos Sub 4 – Wireless Subwoofer – Black
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The Sub 4 is a wireless subwoofer that pairs with any modern Sonos speaker or soundbar. It uses dual inward-facing elliptical woofers to generate deep, punchy bass without any cabinet buzz or rattle. It also includes Wi-Fi 6, a faster processor, and a new matte finish that matches the rest of Sonos’s current lineup. For movies, music, or games, this sub adds a physical dimension that standalone soundbars simply cannot match.
Why we like this Sonos Sub 4 deal
Deep, distortion-free bass down to 25 Hz
The Sub 4 houses two custom 5-inch by 8-inch elliptical woofers facing inward toward each other. This force-canceling design means the cabinet itself doesn’t vibrate or walk across the floor, even at high volumes. The ported enclosure and dual Class-D amplifiers push the frequency response down to 25 Hz, which is well below what most soundbars can manage. That extra low end makes explosions feel physical and basslines feel weighty, without any muddiness or distortion.
Wi-Fi 6, faster processor, and Trueplay tuning
Inside, the Sub 4 has a faster 1.9 GHz quad-core processor, 512MB of DDR4 RAM, and improved Wi-Fi 6 radios for smoother communication with the rest of your Sonos system. The Sonos app guides you through setup in minutes, and Trueplay tuning automatically calibrates the sub to your room’s acoustics. You can stand the Sub 4 upright or lay it flat, and at just 6.2 inches deep, it can slide under a couch or fit neatly beside an entertainment center.
Pairs with any modern Sonos system
The Sub 4 works with Arc Ultra, Arc, Beam (Gen 2), and most S2-compatible Sonos speakers. Once paired, the sub seamlessly handles low frequencies while your soundbar focuses on mids and highs, resulting in clearer dialogue and less strain on the main speakers. You can even pair two Sub 4s for truly massive bass, or mix a Sub 4 with an older Sub (Gen 3) if you already own one. The matte finish in black or white resists fingerprints and blends in with modern decor.
Prices and savings subject to change. Click through to get the current deal prices.
SAVE 16% NOW!
Sonos Sub 4 – Wireless Subwoofer – Black
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What to consider before you buy
The Sub 4 is a significant investment, and it only works within the Sonos ecosystem – you cannot use it with non-Sonos speakers. If you already own a Sub (Gen 3), the Sub 4 offers only incremental upgrades: a matte finish, slightly lighter weight, and faster internals, but the core bass performance is very similar.
That said, if you have a Sonos Arc or Beam soundbar and want to add deep, room-filling bass for movies and music, this discount makes the Sub 4 significantly more affordable.
Prices and savings subject to change. Click through to get the current deal prices.
SAVE 16% NOW!
Sonos Sub 4 – Wireless Subwoofer – Black
SAVE 20% NOW!
Sonos Sub Mini – White – Compact Wireless Subwoofer
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