Sonos Arc Ultra vs Sonos Arc: how do the Dolby Atmos soundbars compare?
The Arc Ultra's 9.1.4 channel configuration, compared to the Arc's 5.0.2, suggests a more expansive soundstage and potentially more precise spatial audio. The new Sound Motion woofer also promises up to twice the bass of the original Arc, which could result in a more impactful low-end performance.