Where did you get this information from? From a tech site or from Qobuz directly? Not doubting you, just interested in more information about this.
I had come across the same discrepancy which I found confusing.
This article may throw some light on the issue.
https://darko.audio/2021/03/hi-res-streaming-comes-to-sonos-via-qobuz-sort-of/
Neibrad thanks for the article, I hadn’t come across that.
Hi Melvimbe, you can find this information here: https://support.sonos.com/s/article/1782?language=en_US
Sonos Amp has been measured to have about 93db SINAD, which isn’t even 16 bits (96.33 db). So there’s really no point in 24-bit streaming to Sonos, or the vast majority of amps out there, until you get to Mola-Mola or Benchmark products. Highly unlikely anyone is going to hear a difference in the noise level, especially considering the noise floor of most listening rooms is MUCH higher than the noise floor of a properly engineered 16-bit recording.
https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-sonos-amp.6957/
https://www.techhive.com/article/3612690/sonos-drops-the-needle-on-high-resolution-music-streaming-via-qobuz.html
This techhive article goes into more detail regarding the expected 24-bit compatibility of each Sonos S2 component. Apparently, even though they are S2 compatible, the Play:1, Play:3 and Sub (Gen 1 and Gen 2) will not be able to live stream 24-bit.
“Two Sonos S2-compatible devices that won’t support 24-bit streaming are the discontinued Play:1 and Play:3 speakers, although they continue to support 16-bit streaming via Qobuz. The first- and second generations of the Sonos Sub are also limited to 16-bit/48kHz streams; fortunately, however, Sonos has confirmed that having older S2-compatible components on your network will not force your entire system to drop to 16-bit resolution. The hardware that’s capable of handling a 24-bit stream will do just that, while the gear that isn’t will play a 16-bit stream. For the record, the third-generation Sonos Sub is capable of decoding a 24/48 stream.”
Hopefully, 24-bit streaming from Amazon Music HD is in the works...