Integrated amplifiers — Pro-Ject Uni Box S3

The Uni Box S3 is an integrated amplifier with modern streaming functionality from Pro-Ject, built with a convenient dedicated MM phono input in a remarkably compact chassis. The Uni Box S3 brings Pro-Ject's considered engineering to a space-efficient, feature-rich integrated format.

Key specs that matter

Two single-ended inputs plus a dedicated MM phono input are provided. Output power is 23W into 8 ohms, rising to 40W into 4 ohms. Frequency response spans 20Hz to 20,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 94dB, with total harmonic distortion plus noise under 0.05%. At a remarkably compact 206 x 55 x 153mm and 1.1kg, the Uni Box S3 maintains a space-efficient, feature-complete integrated amplifier chassis.

Sound and use context

Expect an accessible, dependable amplification character reflecting the strong 94dB signal-to-noise figure, with the built-in streaming functionality and phono input covering both digital and analogue vinyl sources directly.

Pairing

The built-in streaming functionality and MM phono input cover both digital and analogue vinyl sources directly without needing separate outboard devices.

Alternatives

Pro-Ject's own Stereo Box S3 BT offers a related model with Bluetooth connectivity instead of a phono input within the same broader catalogue.