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Feature：

1.All in One HiFi Streamer:
The S3 combines digital transport, DAC & preamp in one chassis. The flagship AKM4493SEQ DAC supports PCM up to 32bit/768kHz with THD+N ≤0.00018% and SNR ≥120dB—delivering reference-grade sound for serious home audio systems

2.WiFi 6 & Bluetooth 5.3:
Dual-band (2.4/5GHz) Wi-Fi and Bluetooth ensure wider coverage and faster wireless connections. Supports AirPlay 2, Spotify Connect, TIDAL Connect, Google Cast, and DLNA. Stream music from NAS or online services with ease

3：Balanced Circuit with Premium Components:
Isolated analog/digital architecture, Japan ELNA capacitors, ultra-low-noise LDO power supply. Dual op-amp differential amplification with XLR balanced outputs, engineered for greater separation and a wider soundstage

4：Intelligent Control & Home Theater Ready:
Easy setup with the Fosi Audio App to control playback and fine-tune the sound via EQ. With HDMI eARC and a dedicated SUB OUT, you can connect to your TV and active subwoofer to build an immersive 2.1 home theater

5：Reliable Streaming Amplifier with Smart Protection:
12V trigger sync, overcurrent/overvoltage safeguards, bottom heat dissipation. Compact 6.81" design—integrated amp companion with audiophile performance

Specifications

Chipset：Amlogic A113X + AKM 4493SEQ + OPA1612
Network：802.11a/b/g/n/ac/ax Dual-Band Wi-Fi
(2.4 GHz and 5 GHz)
10/100M Ethernet port
Bluetooth Version：Bluetooth 5.3
Bluetooth Protocols:A2DP、AVRCP、BTLE
Bluetooth Audio Codecs：SBC、AAC
Remote Control：Bluetooth connectivity with
a range of over 15 meters
Power：DC 12V 1.5A

MAX Sampling Rate：
OPT PCM 24bit/192kHz
Bluetooth PCM 24bit/48kHz
Google Cast PCM 24bit/96kHz
Airplay2 PCM 16bit/48kHz
HDMI PCM 24bit/192kHz
Roon Ready PCM 32bit/384kHz
Wi-Fi PCM 24bit/384kHz
LAN PCM: 32bit/768kHz

Streaming Protocols：Google Cast、AirPlay 2、DLNA、Roon Ready、Spotify Connect、TIDAL Connect 、Qobuz Connect

Fosi Audio App Upgrade Plan

May 2026
All-New Interaction Design: streamlined menus and a redesigned bottom navigation for a more intuitive, fluid experience
Customizable Home Screen: tailor the interface to your preferences
Streamlined Features: refined and consolidated functions for greater efficiency
Enhanced Visual Design: refreshed UI with improved balance, clarity, and overall comfort

Note: This roadmap applies globally. Please refer to official announcements for release timing.

TIPS：

The S3 now supports 10-band EQ adjustment and Qobuz Connect.

Q: What is the maximum PCM sampling rate supported by the Fosi Audio S3?

A: The S3 is equipped with the AK4493SEQ DAC chip, which natively supports PCM decoding up to 32‑bit / 768 kHz, delivering outstanding resolution. However, due to wireless bandwidth limitations, streaming over Wi‑Fi (2.4GHz/5GHz) is capped at 384 kHz to ensure stable, buffer‑free playback. To experience the full 768 kHz high‑resolution audio, we recommend connecting the S3 to your router via the LAN (Ethernet) port, which provides ample bandwidth for stable support of up to 768 kHz. For other input methods (such as HDMI eARC, optical, coaxial, USB, etc.), the actual sampling rate depends on the output capability of the source device; the DAC will support the highest rate permitted by the corresponding input standard.