The Sonos Premium Immersive Set combines Arc Ultra, Sub 4 and two Era 100 speakers to create a powerful wireless Dolby Atmos home cinema system. Arc Ultra delivers expansive spatial audio, exceptional dialogue clarity and impressive bass using advanced Sound Motion™ technology, while Sub 4 adds deep, distortion-free low-frequency impact. Two Era 100 speakers provide dedicated rear surround channels for greater depth and direction across movies, TV, gaming and music. With Trueplay room tuning, Wi-Fi connectivity and effortless control through the Sonos app, this premium surround sound bundle delivers a refined cinematic experience for larger entertainment spaces.