Pro-Ject Pre Box S2 Analogue forforstærker SortAudiophile pre amplifier with 3 line inputs and remote control! Pre Box S2 Analogue features three line level inputs, two pairs of RCA sockets as well as one separate 3. 5 millimeter input. Three individual analogue signals can be passed on to a power amplifier, such as Amp Box S2 or other Pro Ject Box Design power amplifiers, via the RCA pre output! The 3. 5mm fixed line level output can pass the signal on to an additional amplifier, such as a Head