Hi Fosiphiles,
We’re thrilled to kick off this thread with exciting news: S3, Fosi Audio’s first-ever network streamer, is officially in development!
Inspired by your feedback and built for music lovers who crave high-quality streaming, the S3 aims to be the perfect digital bridge between your favorite services and your Hi-Fi system. Whether you’re using Wi-Fi, Ethernet, or Bluetooth, the S3 will keep your setup flexible and future-ready.
We’re planning support for Roon Ready, TIDAL Connect, Spotify Connect, AirPlay2, GOOGLECAST, and more — all in a compact design that complements the Fosi family.
In this thread, we’ll share key updates as development progresses: hardware design, app integration, certifications, and, of course, plenty of sneak peeks.
As always, we’d love to hear your thoughts, ideas, and suggestions. Let’s build the S3 together!
Here is the rendering sketch of the S3:

Basic Specs
We’re thrilled to kick off this thread with exciting news: S3, Fosi Audio’s first-ever network streamer, is officially in development!
Inspired by your feedback and built for music lovers who crave high-quality streaming, the S3 aims to be the perfect digital bridge between your favorite services and your Hi-Fi system. Whether you’re using Wi-Fi, Ethernet, or Bluetooth, the S3 will keep your setup flexible and future-ready.
We’re planning support for Roon Ready, TIDAL Connect, Spotify Connect, AirPlay2, GOOGLECAST, and more — all in a compact design that complements the Fosi family.
In this thread, we’ll share key updates as development progresses: hardware design, app integration, certifications, and, of course, plenty of sneak peeks.
As always, we’d love to hear your thoughts, ideas, and suggestions. Let’s build the S3 together!
Here is the rendering sketch of the S3:

Basic Specs
Input: | WiFi/Ethernet, Optical, RCA, HDMI Earc with CEC, Bluetooth |
Output | RCA, XLR, OPT, Sub-Out |
Trigger | Out |
In-Built DAC | AKM AK4493S |
APP | Download the Fosi Audio app to connect and control the S3. |