Costco Is Quietly Selling a Specialty Sonos Speaker Way Below Its Retail Price

Thanks to this rare deal, Sonos listeners can upgrade their home theater setups for a true fraction of the cost.

White Sonos subwoofer speaker on wooden floor next to wooden sideboard with white bookshelf speakers and decorative items.

Add Gear Patrol as a Preferred Source on Google

Published December 19, 2025

·

If you buy from a link, we may earn a commission. Learn more

Sonos makes hi-fi easy. But there’s always room for crisper highs, more accurate vocals and deeper bass, especially when it comes to building out a respectable home theater.

That’s why some Sonos shoppers don’t stop at small speakers and soundbars, eventually upgrading to the final puzzle piece of the setup: the sub.

Though a Sonos subwoofer can be prohibitively expensive for entry-level shoppers, those that upgrade to the specialist speaker (yes, subwoofers are types of speakers) rarely look back.

Couple sitting on a mustard yellow sofa watching a jet fighter on a wall-mounted TV in a modern living room. — Subwoofers, like those made by Sonos, shoulder the burden of producing bass and thus allow other components to focus on mid- and high-end frequencies.

Subwoofers shoulder the burden of producing bass, leaving one’s other components to focus on the high- and mid-range frequencies. The result: better overall sound at every level of a rig.

Sonos has dabbled in subwoofers for over a decade, culminating in the release of the Sub 4 in late 2024.

But for listeners looking for a deal, Costco is selling the previous generation at a price that competes with the refurbished version listed on the brand’s own website.

White Sonos subwoofer speaker on wooden floor next to green couch with pillows and a potted plant. — The Sonos Sub 3 (pictured) came out in 2020.

How do the Sub 3 and Sub 4 compare?

From afar, both the Sub 3 and Sub 4 actually look, and function, similarly, featuring two inward-facing force-canceling drivers to minimize distortion.

The Sub 4 features increased processing power, more memory and new Wi-Fi radios, however, the changes mostly affect its ability to connect to a larger ecosystem, not its sound.

White Sonos subwoofer speaker on a wooden floor next to a beige rug and a wall-mounted Sonos soundbar. — The Sub 4 (pictured), released in 2024, brought internal changes to Sonos’s subwoofer line but the sound is virtually identical to the Sub 3.

Importantly, the Sub 4 is only compatible with Sonos’s newer speakers and soundbars. In other words, the Sub 3 is actually the optimal choice for anyone with a Play:1, Play:3, Play:5 (Gen 2) or Ikea Symfonisk speaker.

Wooden sideboard with white bookshelf speakers, chess set, framed artwork, and ceramic vases in a living room. — The Sub 3 (left) is compatible with both newer and older Sonos speakers, unlike the Sub 4.

The best part, of course, is that the Sub 3 is significantly cheaper, too.

Thanks to Costco’s current deal, the Sonos Sub 3 is going for $500 — a $300 discount compared to its previous MSRP. The Sub 4, meanwhile, retails for $899 at full price.

How’s that sound?

Black Sonos subwoofer speaker with rectangular cutout in the center on a white background.

Sonos Sub 3

$500 at Costco

About the Author:

Jack Seemer is the executive editor at Gear Patrol, with over a decade of experience in product journalism. He currently reports on a wide range of topics, including footwear, watches, EDC, cookware and more.

Want to stay up to date on the latest product news and releases? Add Gear Patrol as a preferred source to ensure our independent journalism makes it to the top of your Google search results.