Every audio product Sonos has delivered so far has worked on the assumption that you would never need anything else after you bought it, whether it's linking to a sound system you already owned or an all-in-one system that Sonos built itself, like the Play:3 or Play:5 (born as the S5). The newly released Sub, by its nature, is entirely dependent on having one of the two Play speakers, and shows the company is becoming more of a traditional audio brand with a full ecosystem. A primary Sonos component can now be just the first step in a growing collection that improves as you expand it -- much as you'd buy a basic stereo, then better speakers, then more at a high-end audio shop. The Sub's $699 price certainly catapults any Sonos system into high-end territory, however, and sets some decidedly lofty expectations for how it will perform. We'll find out after the break if the sheer power and a few clever tricks are enough for the Sub to be an essential ingredient of a wireless home audio setup.

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Sonos Sub review originally appeared on Engadget on Tue, 19 Jun 2012 09:00:00 EDT. Please see our terms for use of feeds.