Description

The Fosi Audio S3 is a versatile all-in-one HiFi component / hub that combines a network music streamer, high-resolution DAC and analog preamplifier into a single compact unit. Powered by the AKM4493SEQ DAC and OPA1612 op-amps, it delivers exceptionally clean sound with ultra-low distortion and high dynamic range. The S3 supports Wi-Fi 6, Bluetooth 5.3 and Ethernet streaming, providing seamless access to modern digital music sources. With balanced XLR and RCA pre-outputs, HDMI eARC and a dedicated subwoofer output, it integrates easily with HiFi systems, active speakers and even TVs. All of these features make it a powerful and necessary centre-piece for both music listening and home entertainment setups.

ALL-IN-ONE HIFI CONTROL HUB

The Fosi Audio S3 is designed to serve as the central command center of your modern HiFi audio setup. By combining a network music streamer, high-resolution digital-to-analog converter (DAC), and precision analog preamplifier into a single compact unit, the S3 eliminates the need for multiple separate devices and complex signal chains. With its integrated balanced architecture, the S3 allows you to stream music directly from your network, process digital audio with high-precision DAC conversion and control volume and signal output before sending it to your power amplifier or active speakers. This streamlined approach not only simplifies your system but also reduces potential signal degradation that can occur when using multiple external components.

FLAGSHIP AKM DAC & OP-AMPS ARCHITECTURE

At the heart of the Fosi Audio S3 lies the premium AKM4493SEQ DAC chipset, a highly regarded digital-to-analog converter known for its natural tonality, low distortion and exceptional resolution. This advanced DAC architecture is paired with OPA1612 audiophile-grade operational amplifiers, forming a carefully engineered balanced signal path that ensures highly accurate and transparent audio reproduction. This high-performance design allows the S3 to achieve extremely low distortion levels, with THD+N as low as 0.00018% and a signal-to-noise ratio of up to 120 dB. Such performance ensures that even the most subtle details in your music are reproduced with remarkable clarity, dynamic range and precision.

ADVANCED AMLOGIC A133X STREAMING PLATFORM

The Fosi Audio S3 is powered by the Amlogic A113X streaming processor, a capable platform designed to handle high-resolution audio streaming with stability and efficiency. This advanced processing engine enables seamless integration with modern digital music ecosystems while ensuring smooth playback and responsive performance. For connectivity, the S3 supports Wi-Fi 6 for fast and reliable wireless streaming, along with Bluetooth 5.3 for convenient device pairing and playback from smartphones, tablets and laptops. For users who prefer maximum stability and bandwidth, the Ethernet LAN connection provides a reliable wired network option for uninterrupted high-quality streaming. Whether you’re streaming music from online services, playing local network libraries, or connecting wireless devices, the S3 offers a flexible and modern streaming experience designed for today’s digital music environments.

VERSATILE AUDIO SYSTEM INTEGRATION

Designed with versatility in mind, the Fosi Audio S3 offers both balanced XLR outputs and traditional RCA pre-outputs, allowing it to integrate effortlessly with a wide variety of HiFi systems. This makes the S3 compatible with power amplifiers, integrated amplifiers and active speakers, giving users the freedom to build the system that best suits their listening preferences. The balanced XLR output stage plays a crucial role in maintaining signal integrity, particularly in high-performance audio setups. Balanced connections help reduce electrical noise and interference while improving channel separation, resulting in a cleaner audio signal, lower noise floor and a more expansive soundstage.

APP-BASED CONTROL & 5 BAND EQ SUPPORT

The Fosi Audio S3 can be conveniently controlled using the Fosi Audio companion app, providing users with a modern and intuitive way to manage their audio system. Through the app interface, users can easily control playback, switch between input sources, adjust volume levels and manage streaming functions directly from their smartphone or tablet. The app also features a built-in 5-band precision equalizer, allowing users to fine-tune the sound signature according to their personal listening preferences, headphones, speakers or room acoustics. This level of control enables users to tailor their system’s tonal balance, enhancing bass response, improving vocal clarity or adjusting overall sound presentation.

TV AUDIO & HOME THEATER READY

Beyond music streaming, the Fosi Audio S3 also integrates seamlessly into modern home entertainment systems. With HDMI eARC support, the S3 can receive high-quality audio signals directly from your television, making it easy to upgrade your TV sound with true HiFi audio performance. This feature allows the S3 to function as a high-quality audio processor for movies, shows, and gaming, delivering clearer dialogue, improved dynamics and more immersive sound compared to standard TV speakers. Additionally, the dedicated subwoofer output allows users to easily build a 2.1 channel audio setup, adding powerful low-frequency performance for a richer and more cinematic listening experience. Whether used for music or home entertainment, the S3 provides a flexible solution for enhancing your overall audio system.

MULTI ROOM PLAYBACK AND REMOTE OPERATION

The Fosi Audio S3 also supports convenient multi-room audio playback, allowing you to stream music across multiple compatible devices throughout your home. This feature makes it easy to create a synchronized listening experience where the same music can play in different rooms simultaneously, or different audio streams can be assigned to separate zones based on your preference. Whether you're hosting guests, moving between rooms or simply enjoying music throughout your living space, multi-room playback ensures seamless audio coverage.
For added convenience, the S3 includes both app-based and physical remote-control options, giving you flexible control over your system. Using the companion mobile app, you can manage playback, switch inputs, adjust volume and control streaming functions directly from your smartphone or tablet. Additionally, the included remote control allows quick and effortless adjustments from across the room, making everyday operation simple and intuitive. Together, these control options provide a smooth and user-friendly experience for managing your entire audio setup.

Specifications

Brand
Fosi Audio
Model
S3
Streaming Chip
Amlogic A113X
DAC Chipset
AKM AK4493SEQ
Amp Chipset
OPA1612
Power
DC 12V / 1.5A
Network
802.11 a/b/g/n/ac/ax Dual-Band Wi-Fi (2.4GHz & 5GHz), 10/100M Ethernet
Bluetooth
Bluetooth 5.3, A2DP, AVRCP, BTLE; SBC & AAC
Remote Control
Bluetooth Remote (Range over 15m)
Streaming Protocols
Google Cast, AirPlay 2, DLNA, Roon Ready, Spotify Connect, Tidal Connect
App
Fosi Audio App (Google Play & Apple App Store)
Dimensions
17.3 × 17.3 × 4.7 cm (6.81 × 6.81 × 1.85 in)
OPT Input
PCM 24bit / 192kHz
Bluetooth Input
PCM 24bit / 48kHz
Google Cast
PCM 24bit / 96kHz
AirPlay 2
PCM 16bit / 48kHz
HDMI
PCM 24bit / 192kHz
Roon Ready
PCM 32bit / 384kHz

Box Content

    What will you get
  • 1x Fosi Audio S3
  • 1x DC Power Adapter
  • 1x Remote Control
  • 1x Optical Cable
  • 1x Quick Guide

Warranty

1 YEAR WARRANTY

Don't worry, Fosi Audio S3 comes with a 1 Year warranty against manufacturing defects. We guarantee that every product on Concept Kart is genuine and backed by the Manufacturer's warranty.

Read more about Concept Kart's warranty policy.

Shipping Policy

FREE SHIPPING ON ALL PREPAID ORDERS

We usually ship orders on same day if ordered before 2 pm or within 24 hours if ordered later (except on holidays/sunday, where processing times may be higher) from one of our domestic warehouses based out of Delhi. It normally takes around 1 to 5 business days for delivery. We use premium service partners such as Blue dart, DTDC and Delivery for faster and reliable service. A tracking number will be provided upon shipment.

In very rare cases when order is not received after 10 business days of shipment (extended by number of days when the govt. Restricts movement of goods due to factors such as coronavirus pandemic), please contact us and we will provide you a support.