Pro-Ject Stereo Box S3 BT Integrated Amplifier with BluetoothSome setups make the use of big amplifiers impossible, but with the new Stereo Box S3 BT you have a big sound in an ultra compact casing. It features two line level RCA inputs and a AptX HD capable BT input to easily connect all your sources. The Stereo Box S3 BT features enough power to drive your favourite speakers with a fantastic sound quality. The 3. 5mm jack variable output can be connected to an additional amplifier, active speakers or a