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Although we generally raved about the performance of Sonos' Play:3 wireless HiFi speakers, one of our chief complaints rested in their slightly muddy bass output. Folks who've felt similarly should be pleased to know that the company has unveiled its first subwoofer, dubbed Sonos Sub. This $700 bass-dropper works wirelessly with your existing Sonos speakers, requiring a quick a setup within the app to ensure it's in-phase and putting out an adequate level of volume. You'll only find a single cable and switch for power on the outside, while looking through its center reveals a duo of "force-cancelling" drivers. Two internal air-ports also flow from top to bottom to aid in the unit's bass reproduction.

We gave a pre-production unit a very brief listen with a stereo array of Sonos Play:3s and came out fairly impressed. The speakers are no slouches on their own, but there's no denying the extra power a sub can add to the HiFi boxes. Measuring in at 15.8 x 6.2 x 15 inches (402 x 158 x 380mm) the Sub dwarf's even the larger Play:5, but a Sonos rep let us know it ensures it'll cover a range of spaces -- not mention folks using the Connect:Amp with their own HiFi speakers (Sonos' Connect, ZP90 and ZP80 aren't compatible, however). We got pleasing results from our unit planted on a table a few feet away from any walls, and the system didn't show any signs or shaking or rattling. The Sub can thankfully rest sideways for placement under some couches, but you'll likely want to "set it and forget it" since it weighs about 36 pounds. Our only displeasure rests in the glossy finish -- a magnet for fingerprints and dust -- but we're told a non-gloss version will be offered later for $100 less. You'll be able to pick up this wub-maker come June 19, so check out the video and press release after the break for more info in the meantime.

Gallery: Sonos Sub (eyes-on)