Audio format support

Wireless II is repeatedly credited with broad hi-res support including up to 24-bit/384kHz playback, plus DSD256 and MQA core decoding; several reviews note that speaker-to-speaker wireless linking can downsample and that wiring the pair unlocks higher inter-speaker resolution.

Supports a wide range of formats including Dolby Atmos and DTS:X, with common praise for how convincingly it renders immersive mixes.

Beyond standard Bluetooth playback, multiple reviews highlight USB-C wired playback supporting lossless or hi-res audio from compatible sources, making format support a notable strength when used wired.

Strong Dolby support is a headline feature, including Dolby Atmos; higher quality Atmos can depend on eARC and proper TV passthrough. Optical fallback is typically limited to non-Atmos formats, and DTS:X is not supported.

Over Wi-Fi and within the Sonos ecosystem it supports many streaming services and can deliver higher-quality audio than Bluetooth alone.

Audio format support is described as basic: Dolby Digital/Dolby Audio is referenced, while Dolby Atmos and DTS-family immersive/decoding features are repeatedly noted as missing.