Pro-Ject Audio Systems

Stereo Box S3 BT

The Pro-Ject Audio Systems Stereo Box S3 BT is an ultra-compact integrated amplifier with two RCA line-level inputs, Bluetooth 5.0 with aptX/aptX HD and A2DP support, and a variable 3.5 mm stereo output for a subwoofer, second-zone amplifier, or active speakers. It delivers 2 × 21 W into 8 ohms or 2 × 40 W into 4 ohms at 1% THD and uses an analogue volume control with a motor-driven potentiometer, isolated speaker outputs, and gold-plated RCA connectors. The unit has a rigid aluminium/metal casing, is handmade in Europe, and measures 103 × 37 × 115 (138) mm with sockets, weighing 450 g without its power supply.