The Sub Mini is a product that Sonos users and fans have waited for a long time. It's a compact and good-looking subwoofer, which can be wirelessly paired with every speaker and soundbar from Sonos' current offering, except for the company's two portable speakers, Roam and Move. Thanks to the form factor and cylindrical shape, the Sub Mini seamlessly integrates into just about any space you might want to add it to, although it openly aims toward small and medium-sized rooms. For larger rooms, Sonos still wants you to opt for the $750/€850 Sub, more so if you plan to combine it with the Sonos Five speaker or the Arc soundbar.

The Sub Mini performs well. Its sturdy construction and force-canceling speaker driver layout make its enclosure pretty much dead silent in terms of rattle, buzzing, or other anomalies that can occur when a large amount of air is being moved through a compact subwoofer. It's a straightforward improvement to the low-end prowess and overall sound quality of any Sonos product you decide to pair it to, especially those that aren't bass monsters, such as the Ray and Beam Gen 2 soundbars, and the One/One SL/SYMFONISK speaker lineup.

The Sub Mini's main issue is its price, which Sonos has set at $429/€499. This is a tough pill to swallow, especially if we keep in mind that the Sub Mini was not only supposed to be a more compact but also a drastically more affordable alternative to the "regular" Sub. Sure, coming in at $750/€850, the Sub is even steeper, but that doesn't change the fact that the Sub Mini is simply too expensive to present a reasonable pairing with the Ray ($280/€300) or the One ($220/€230 per unit) and One SL ($200/€199 per unit). It's not even easy to digest as an upgrade for the Beam Gen 2 ($450/€500), a soundbar it pairs beautifully with. On the other hand, it's easy to understand why Sonos can afford to sell it at such a price: for owners of the company's speakers and soundbars, there is no cheaper alternative. And that's exactly why you currently can't even buy one; the demand is so high that it's already on backorder, and you'll have to wait at least a month to get your hands on it.