Uni Box S3 - Streaming amplifier
black - Pro-Ject

• Uni Box S3 - Streaming amplifier - black - Pro-Ject

Pro-Ject Uni Box S3 - Compact streaming amplifier with true hi-fi aspirations
The Pro-Ject Uni Box S3 combines the best of two worlds: uncompromising analog technology and modern streaming versatility. Hidden in an elegant, compact aluminum housing is a fully-fledged hi-fi amplifier that combines the highest sound quality with contemporary ease of use - ideal for music lovers who want to enjoy vinyl, CD and streaming in equal measure.
While many all-in-one solutions process their signals completely digitally, the Uni Box S3 remains consistently in the analog signal path for analog sources - such as a record player. The result: a natural, dynamic sound image with impressive spatiality and fine detail, free from digital artifacts.

Thanks to the integrated WiiM OS, the Uni Box S3 also offers state-of-the-art streaming technologies and seamless multi-room functionality. Whether Spotify Connect, Tidal Connect, Qobuz or local music sources - your entire music collection is always available in audiophile quality.

Sound meets convenience
The Pro-Ject Uni Box S3 is more than just a compact amplifier - it is a central control point for your entire music system.
The integrated MM phono input allows direct connection of a turntable, while two additional line inputs, digital interfaces (coax, Toslink, TV eARC) and Bluetooth 5.1 guarantee maximum flexibility.
A high-quality Cirrus Logic CS4344 DAC (24 bit / 192 kHz) ensures precise, detailed conversion of digital signals. The analog dual-mono amplifier design delivers 2 × 40 watts into 4 ohms - enough power to drive even the most demanding speakers with ease.
The system can be expanded as required via the variable subwoofer output. A 6.3 mm headphone output also offers uncompromising listening pleasure for private music moments.
The Uni Box S3 is conveniently controlled via the Pro-Ject Home app or the remote control supplied.

Highlights & features

• Powerful analog dual mono amplifier with 2 × 40 watts at 4 ohms
• Analog inputs: 2 × line RCA, 1 × MM phono (46 dB, extremely low-noise)
• Digital inputs: Coaxial, 2 × Toslink, TV eARC
• High-quality DAC: Cirrus Logic CS4344 (24 bit / 192 kHz)
• WiiM OS streaming platform with multi-room function
• Supports Spotify Connect, Tidal Connect, Qobuz and many more
• Streaming of all inputs in the home network (e.g. to other Pro-Ject devices)
• Bluetooth 5.1 & WLAN (2.4 / 5 GHz) for stable connection
• 6.3 mm headphone output and variable output for subwoofer or second amplifier
• Control via Pro-Ject Home App or included remote control
• Solid aluminum housing - available in black or silver
• Developed & manufactured in Europe

Technical specifications

• Output power: 2 × 40 W at 4 Ω
• Analog inputs: 2 × line RCA, 1 × MM phono
• Digital inputs: Coax, 2 × Toslink, HDMI eARC
• DAC: Cirrus Logic CS4344, 24 bit / 192 kHz
• Connectivity: WLAN (2.4 / 5 GHz), Bluetooth 5.1
• Outputs: 6.3 mm headphones, variable subwoofer/pre-out
• Dimensions (W × H × D): 206 × 55 × 153 mm
• Weight: 1.1 kg
• Power supply: External power supply unit (included in the scope of delivery)
• Scope of delivery: Uni Box S3, remote control, power supply unit, manual

The Pro-Ject Uni Box S3 shows that real hi-fi sound and modern streaming are not a contradiction in terms. It combines analog musicality with digital convenience - precise, elegant and compact.
Whether as the central element of a minimalist system or as a high-quality solution in the living room: this all-in-one component brings music in its most beautiful form - authentic, versatile and audiophile.