Manual
© Audio Trade GmbH · Pro-Ject Amp Box S · Revision 2013.1.15
3
Remote power on 
The amplifier can be switched on & off via a special connection from the Pro-Ject Pre Box via the 2,5mm 
socket marked Trigger In. 
A 45cm long power-on cable (polarity 
+
) is supplied for this purpose. Longer cables are available as 
accessories. The remote power-on signal can be relayed to further units via the Trigger Out socket. 
To switch on from standby or to standby 
The push button on the front panel of the unit alternately turns the power on or returns it to standby mode. The 
blue LED above the stand-by push button shows that the unit is switched on. 
Technical specifications Pro-Ject Amp Box S 
Power output:  2 x 25W/35W at 8 ohms/4 ohms (both channels driven) 
Frequency response:  5Hz - 20kHz (+ 0dB, - 0,5dB) 
Channel separation:  >40dB at 20kHz 
Noise floor:  >-100dB (A weighted) 
THD:  <0,05% at 10W 
Gain: 22dB 
Pre in:  1 pair RCA/phono sockets 
Input sensitivity:  1V 
Input impedance:  47kohms 
Speaker connectors:  4mm  banana plugs, spades connectors or naked wire 
Trigger:  12V DC switching voltage 
Trigger in and out:  2-pole co-axial  2,5mm co-axial jack 
Outboard power supply:  20V/3A DC (peak 7A DC), suitable for your country's mains supply 
Power consumption:  3A DC, <1W in standby 
Dimensions W x H x D (D with sockets):  103 x 36 x 104 (122)mm 
Weight:  670g without power supply 
Service 
Should you encounter a problem which you are not able to alleviate or identify, please contact your dealer for 
further advice. Only when the problem cannot be resolved there should the unit be sent to the responsible 
distributor in your country. 
Warranty 
The manufacturer accepts no responsibility for damage caused by not adhering to these instructions 
for use. Modification or change to any part of the product by unauthorized persons release the 
manufacturer from any liability over and above the lawful rights of the customer. 
Copyright 
PRO-JECT is a Registered Trademark of H. Lichtenegger.
This guide was produced by: Audio Trade GmbH 
Copyright 
©
 2012. All rights reserved. 
The information was correct at the time of going to 
press. The manufacturer reserves the right to make 
changes to the technical specification without prior 
notice as deemed necessary to uphold the ongoing 
process of technical development. 



