Fosi S3 Music Streamer / DAC / Balanced Preamplifier

The Fosi Audio S3 is a Balanced Hi-Fi music streamer, DAC, and preamplifier powered by the Amlogic A113X processor and featuring the flagship AK4493SEQ DAC chip with OPA1612 op-amps. With Wi-Fi 6, Bluetooth 5.3, and wired Ethernet connectivity, the S3 streams seamlessly from Spotify Lossless and TIDAL Connect, with Roon Ready certification coming soon. The device offers comprehensive connectivity including HDMI eARC for TV integration, optical inputs, and XLR balanced plus RCA pre-outs for flexible system integration. A dedicated subwoofer output and intuitive Fosi Audio app provide complete control over your audio setup. Designed as an all-in-one solution, the S3 combines modern streaming capabilities with audiophile-grade components for superior sound quality.

Supports wide range of streaming services such as TIDAL Connect and Spotify Lossless. You can stream music directly from your music Apps to the S3 for seamless playback.  Capable of up to Roon PCM 32bit/384kHz lossless audio, it delivers wired-grade sound quality with the convenience of wireless control. 

The S3 is easy to set up and use with the Fosi Audio App, allowing you to control playback and effortlessly switch input/output modes. The app’s built-in 5-band precision EQ lets you fine-tune the sound to match your preferences.

The S3 is easy to set up and use with the Fosi Audio App, allowing you to control playback and effortlessly switch input/output modes. The app’s built-in 5-band precision EQ lets you fine-tune the sound to match your preferences.

S3 is powered by the Amlogic A113X streaming platform and a flagship AKM DAC, with OPA1612 op-amps in a balanced design. With THD+N as low as 0.00018% and a SNR up to 120dB, it ensures a clean, accurate signal at the source—laying a solid sonic foundation for your HiFi system.

The S3 features an independent AKM4493SEQ DAC with dual op-amp differential amplification and XLR balanced outputs, engineered for high-fidelity home audio. We recommend pairing it with the ZD3 and ZA3 to build a balanced system, which will bring a cleaner background, clearer layering, and a more expansive soundstage.

Carefully selected top-tier components like Japanese ELNA Capacitors and Ultra-Low-Noise LDOs ensure lower noise and a cleaner signal path, delivering purer, more refined sound with every listen.

Equipped with high-bandwidth HDMI eARC, it delivers lossless audio from your TV with exceptional clarity and detail. With a dedicated SUB OUT, you can easily connect an active subwoofer and build a powerful 2.1 system for a truly immersive cinematic experience.

Connect your mobile devices to the S3 and stream your favorite content. Whether you're a casual listener or an audiophile, the S3 makes high-quality listening simple and accessible. With stable wireless streaming, lossless music is no longer limited by cables.

Features

• All-in-One Balanced Hi-Fi Streamer, DAC and Preamplifier
• Amlogic A113X streaming platform
• Flagship AK4493SEQ DAC chip paired with OPA1612 op-amps for clean, detailed sound with THD+N as low as 0.00018% and a SNR up to 120dB
• Wi-Fi 6 and Bluetooth 5.3 for stable wireless streaming, alongside a wired Ethernet port.
• 1 x HDMI eARC for TV integration
• 1 x Analog Input, 1 x Optical Input 
• 1 x Optical Out (use with AVR, Soundbar or External DAC)
• XLR balanced and RCA pre-outs, plus a dedicated subwoofer output.
• Multi-Room Playback 
• 12v Trigger Out
• Overcurrent and Over-voltage protection
• Bluetooth Remote Control

Specifications

Includes

• Fosi Audio S3
• Bluetooth Remote Control
• Quick Guide
• DC Power Adapter
• Optical Cable

Awards & Reviews

About

Fosi Audio, established in Shenzhen in 2017 by Ryan Huang, has emerged as a pioneering force in democratizing high-fidelity sound. Guided by four core tenets—Foresight, Openness, Sincerity, and Innovation—the brand has cultivated a distinguished presence across 150+ nations. Renowned for exceptional sonic value and community-driven engineering, Fosi integrates premium components from industry leaders like Texas Instruments. Their philosophy transcends conventional audio retail, offering both refined finished products and bespoke DIY solutions for the discerning enthusiast seeking uncompromised quality without premium pricing.