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Free Shipping
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36 Instalments
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2 Years Warranty
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Free Shipping
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36 Instalments
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2 Years Warranty
Analogue amplifier with modern streaming
The Pro-Ject Uni Box S3 is a compact stereo amplifier that brings analogue sound and modern streaming together. Analogue sources such as a turntable are never digitised, so they keep their natural character. It delivers 2 × 23 W into 8 Ω and 2 × 40 W into 4 Ω from an aluminium case just 206 mm wide.
Streaming is powered by WiiM OS and controlled with the Pro-Ject Home app. With an MM phono stage, HDMI ARC for the TV and Bluetooth, it can be the heart of a complete system. Winner of the EISA Best Value Streaming Amplifier 2026-2027 award.
Streaming with WiiM OS
Streaming comes from WiiM and WiiM OS, with a Cirrus Logic CS4344 DAC up to 24-bit / 192 kHz. The Pro-Ject Home app finds the unit automatically and guides you through the Wi-Fi setup. You can even send the sound of your turntable, CD player or TV to other compatible Pro-Ject streamers.
The heart of your system
Eight inputs cover every source: two analogue RCA, MM phono, coaxial, two optical, HDMI ARC and streaming over Wi-Fi and Bluetooth 5.0. It pairs perfectly with the CD Box S3, Tuner Box and a Pro-Ject turntable for a compact, tidy system.
Analogue amplification
The pre- and power amplifier stages are analogue designs, with a Texas Instruments TPA3221 power amplifier. Analogue signals stay analogue from input to speakers, for punchy, precise sound. All core functions work without an app or software updates.
Features
- Type: Stereo streaming amplifier
- Power: 2 × 23 W (8 Ω), 2 × 40 W (4 Ω)
- Signal-to-noise ratio: 94 dB
- Power amplifier: Texas Instruments TPA3221
- DAC: Cirrus Logic CS4344, 24-bit / 192 kHz
- Analogue inputs: 2 × RCA line, 1 × MM phono
- Digital inputs: 1 × coaxial, 2 × optical, HDMI ARC
- Wireless: Wi-Fi 5 (WiiM OS), Bluetooth 5.0 SBC/AAC
- Outputs: 1 × variable RCA, headphones (70 mW / 32 Ω)
- App: Pro-Ject Home
- Power supply: 20 V / 3 A DC
- Dimensions (W × H × D): 206 × 55 × 153 mm
- Weight: 1.1 kg (without power supply)
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