Follow ZDNET:  Add us as a preferred source  on Google. Sonos has perhaps been the most recognized name in the home speaker market for some time, but Denon has something to say about that. The company recently launched its lineup of second-generation home speakers: the Denon Home 200, Home 400, and Home 600. The Denon Home 400 is the mid-tier option in the lineup, and it's designed to go head-to-head with the Sonos Era 300 . It has a similar, larger form factor, up-firing Dolby Atmos speakers, and a slew of smart streaming features. It's also built on the company's HEOS multi-room audio platform, for integration with speakers from other HEOS-compatible lineups. Also:  I replaced my Sonos Era speakers with an unlikely alternative - and didn't miss a beat Sonos has spent years refining its smart speaker offerings, and the Era 300 is an excellent example of where it's landed. Can Denon truly take on the likes of Sonos with competitive alternatives? I've been using the Denon Home 400 to find out.…