Pro-Ject Uni Box S3: Revolutionizing Analog and Streaming Audio

The amplifier operates on a dual-mono design and features a fully analog pre-amplifier and power amplifier circuit, delivering up to 23 watts per channel into 8 Ohms or 40 watts per channel into 4 Ohms. Its Texas Instruments TPA3221DDV chip handles amplification duties, promising dynamic precision and clarity, especially with nearfield monitors or efficient loudspeakers. A motorized analog volume attenuator further ensures smooth control and sonic fidelity.

Pro-Ject has also infused modern digital capabilities into the Uni Box S3, with four hardwired digital inputs — including Toslink, coaxial, and HDMI ARC — that feed a Cirrus Logic CS4344 DAC capable of processing signals up to 24bit/192kHz. Complementing this digital arsenal is wireless connectivity powered by WiiM OS, bringing Spotify Connect and Tidal Connect seamlessly into the ecosystem alongside a dedicated Pro-Ject Home app for broader streaming service access. Bluetooth 5.1 further expands compatibility for mobile devices, while future-proofing with dual-band Wi-Fi ensures stable connectivity.

There's a notable feature allowing users to stream connected analog devices like turntables or CD players to other zones. However, this functionality introduces digitization to the analog inputs at the streaming stage, raising technical curiosity about whether Pro-Ject might eventually allow users to toggle digital processing for features such as room correction within the primary listening zone.

Other highlights include a front-panel headphone jack delivering 70mW into 32 Ohms and an analog variable output for attaching a subwoofer, leaving crossover management in the hands of the listener. The amplifier is compact, housed in aluminum chassis available in silver or black finishes, and powered through an external supply unit. With a price tag of €799, Pro-Ject's Uni Box S3 balances analog mastery and digital innovation within a refined yet user-centered design.