Sonos has slowly built an empire of loyal users who not only value the quality of the company's wireless speaker lineup, but the ease of use of the system as a whole. For many of these people, the Sonos Sub represents the last piece of the puzzle—you don't start with this speaker, obviously, but it's the component that might just take your enjoyment of the entire system to the next level. At $699, the Sub isn't even remotely cheap. But there's no denying it adds an excellent low-frequency depth, ranging from subtle bass anchoring to serious deep bass thunder, and the Sonos app lets you easily adjust bass levels without leaving your seat. So while the price is high, the results are undeniably excellent. Design Available in glossy black or white models, the 15.3-by-15.8-by-6.2-inch Sub has an interesting shape with a little window (the "acoustic slot") through the middle of its body. It almost resembles a blocky, display font version of the letter O. The size is similar to plenty of...

The Sonos Sub, an expensive wireless subwoofer that's easy to adjust via app, isn't how you start a Sonos system, but it's a terrific addition to complete one.

Powerful, thunderous bass at highest levels; Subtle low-frequency anchoring at more modest volumes; User-controllable bass levels; Attractive design; Can sit vertically or be laid flat; Easy integration into existing Sonos systems

Expensive; Large; Only works with Sonos speakers, cannot be physically connected to a subwoofer output

VERY BEST SOUND.

Works really well with movies.

The Sonos Sub, an expensive wireless subwoofer that's easy to adjust via app, isn't how you start a Sonos system, but it's a terrific addition to complete one.

Powerful, thunderous bass at highest levels; Subtle low-frequency anchoring at more modest volumes; User-controllable bass levels; Attractive design; Can sit vertically or be laid flat; Easy integration into existing Sonos systems.

Expensive; Large; Only works with Sonos speakers, cannot be physically connected to a subwoofer output.

I bought this alongside the Sonos playbar and 2 Sonos One as part of a 5.1 setup. It cost a bit more than I usually spend but the ease of setup and quality audio is well worth it. By far the best system I've ever had, great for watching films as the clarity of highs can still be picked out with the...

This sub is really good for its size. The way it is designed you can place it almost anywhere because it is so small and slender. When connected to the Sonos PlayBar it rumbles out some good solid Bass.

Good solid Bass; Takes up very little real-estate; look good

None so far

We bought the final piece of our Sonos system to add the extra kick, having already purchased the Beam some months before and being given an One; it was super simply to add to the group and adds some omph in action movies and bass in late night beats

We own two sonos bars, two subs, a Play 1 and a Play 5. We loved them for about two years, then sonos released an update that took the sonos app off of the lock screen for everyone, and now songs played from the phone don't finish, they get part way in and skip to the next song.

Sub is great.

I already have a few Sonos products, started with a play 1, added a play five then the sound bar and finally THIS...it's a serious piece of kit. Finished off tv sound perfectly and adds an element of club like base to any dance track. It also enhances every element of audio for the better.