The Era 300 is one of the most impressive music speakers Sonos has released in years, with loud bass, detailed highs and excellent clarity. It also supports spatial audio, but that experience is hit-or-miss. Not all Dolby Atmos mixes are necessarily better. Even the best spatial audio tracks are subtle improvements over the originals. Still this speaker sounds great regardless of what music format you’re playing – as it should, considering its high price.