Pro-Ject Uni Box S3 Universal Integrated Amplifier Black

Pro-Ject Uni Box S3 Integrated Streaming Amplifier – Analogue Meets Streaming, Seamlessly

Discover a new benchmark in all-in-one Hi-Fi performance with the Pro-Ject Uni Box S3, a compact streaming amplifier that unites the warmth of analogue sound with the freedom of modern wireless listening. Designed for those who refuse to compromise audio integrity for convenience, it delivers true high-fidelity performance while offering full access to today’s most popular streaming platforms.

Key Features

• All-in-one Hi-Fi system: amplifier, streamer, DAC, and MM phono stage
• HDMI ARC for effortless TV integration
• WiiM OS streaming: Spotify, TIDAL Connect, AirPlay 2, and more
• High-quality Cirrus Logic CS4344 DAC with 24-bit/192kHz support
• Built-in MM phono stage for direct turntable connection
• Multi-room playback to compatible Pro-Ject streaming devices
• Hi-Res audio compatibility including FLAC, WAV, and AIFF
• Premium European construction with a hand-assembled aluminium chassis

Analogue Purity with Modern Streaming Convenience

Unlike many streaming amplifiers that rely heavily on software control, the Uni Box S3 retains a fully analogue preamp and power amp design. This ensures that vinyl, CDs, and other classic sources maintain their dynamic, natural character. Powered by the intuitive WiiM OS, the system enables simple, reliable access to all major streaming platforms through the Pro-Ject Home app, offering the best of both worlds—analogue performance with digital ease.

Elegant, Compact, and Thoughtfully Engineered

Crafted from solid aluminium, the Uni Box S3 offers excellent rigidity and effective shielding from electromagnetic interference. Its minimalist aesthetic is matched by practical functionality: the front Stream button allows quick pairing and Wi-Fi resets, while the supplied remote keeps everyday operation simple. Despite its compact footprint, the amplifier delivers robust, room-filling performance suitable for a wide range of speakers.

Versatile Connectivity for Vinyl, TV, Digital, and More

Whether you’re spinning records or streaming playlists, the Uni Box S3 is built to accommodate every source in your system.

• MM Phono Input – Direct turntable connection
• 2 × RCA Line Inputs – Ideal for CD players or legacy components
• Optical & Coaxial Inputs – Use the internal DAC for digital sources
• HDMI ARC – Instant, high-quality TV audio integration
• Banana-compatible Speaker Terminals – Secure, high-performance connection
• Headphone Output & RCA Subwoofer Pre-Out – For private listening or enhanced bass

A Future-Ready Hub for Whole-Home Music

With true multi-room capability, the Uni Box S3 can distribute any connected analogue or digital source to other compatible Pro-Ject devices throughout your home. Full interoperability with the forthcoming Stream Box S3, Stream Box E, and Wireless Box E (expected late 2025) makes this amplifier a long-term investment in whole-home audio.

Why Choose the Pro-Ject Uni Box S3?

• No ongoing app dependency for core operation
• Compact design that fits seamlessly into any living space
• Audiophile-level clarity with DSP-tuned performance
• Crafted in Europe using precision-engineered, eco-conscious components

The Ultimate Hybrid: Analogue Performance with Digital Freedom

The Pro-Ject Uni Box S3 redefines what an integrated streaming amplifier can be. It combines the soul of classic Hi-Fi with the efficiency of modern streaming, wrapped in a beautifully engineered, space-saving design. For listeners who appreciate authenticity and convenience in equal measure, this is the ideal all-in-one solution.