Sonos vs Denon: settlement reached, Denon HEOS continues 'unchanged'

The legal battle between Sonos and Denon, over patent infringements by Denon’s HEOS wireless multi-room product line, appears to have been resolved.

In October 2014, Sonos took action against D&M Holdings (then owner of Denon, before it was bought in 2017 by Sound United), claiming that Denon's HEOS products infringed ‘at least four’ patents.

That lawsuit has now reached a resolution, with Sonos and Sound United signing an agreement to end the ongoing dispute, including dropping an upcoming case filed against Sonos by Denon.

In a blog post, Sonos notes that the “litigation against Denon brought validation to our beliefs – most notably in a December 2017 jury trial, during which the jury affirmed the validity of three of our foundational patents. When presented with overwhelming evidence of Denon’s intentional and blatant copying, the jury also found that Denon wilfully infringed our patents.”

However, Sonos says it was subsequently approached with "what we believed was a fair and favourable resolution”.

The terms of the agreement are confidential, however Kevin Duffy, CEO of Sound United, says that Denon's "direction with HEOS is unchanged".


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Becky Roberts

Becky is the managing editor of What Hi-Fi? and, since her recent move to Melbourne, also the editor of Australian Hi-Fi magazine. During her 10 years in the hi-fi industry, she has been fortunate enough to travel the world to report on the biggest and most exciting brands in hi-fi and consumer tech (and has had the jetlag and hangovers to remember them by). In her spare time, Becky can often be found running, watching Liverpool FC and horror movies, and hunting for gluten-free cake.