Manual
© Pro-Ject Audio Systems · Pro-Ject Pre Box RS (from S/N D16273) · Revision 2014.10.27 
3
Inputs 
The  inputs  In1  (RCA/phono  sockets)  and  In  4  (XLR  sockets)  provide  higher  gain.  They  are  dedicated  to 
sources with low level output signal, e.g. phono preamplifier, tape deck, or FM tuner. The inputs In 2 and In 
3 (RCA/phono sockets) as well as In 5 and In 6 (XLR sockets) are suited to high level output sources like CD 
player, D/A converter, or streamer. 
Mains power connection 
Connect the low voltage plug from the power  supply  to  the  Power 18-20V 
 socket before connecting  the 
power supply to the mains. 
Remote control 
 turns the unit on or back into standby 
 and   adjust the sound volume 
 and   select the inputs 
Front panel controls 
To switch on from standby or to standby 
The switch on the left hand side of the front panel turns the unit on or back into standby. The blue LED above 
the stand-by switch shows that the unit is switched on. 
After  switching on,  the  tubes  need  a  short  time  to  reach the  correct operating  temperature. During 
warm up the blue LED above the stand-by switch is blinking. 
We recommend to set the volume control to 0, prior to switching on. 
Input selector 
After the unit is powered on, operating the switch next to the six LEDs selects the inputs. The selected input 
will be shown by the corresponding LED. 
Volume 
Adjust the volume to the desired level, using the large knob on the front panel. 
CH+
CH-
VOL+
VOL-
ON/OFF
1
ON/OFF
0
VOL
0
+
VOL
0
CH
0
+
CH
!




