Pro-Ject Audio Systems Box Design Pre Box DS User manual

INSTRUCTIONS FOR USE
Pro-Ject Pre Box DS

© Audio Trade GmbH · Pro-Ject Pre Box DS · Revision 2013.1.15
2
Dear music lover,
thank you for purchasing a PRO-JECT AUDIO preamplifier.
In order to achieve maximum performance and reliability you should study these instructions for use carefully.
!
Warning of a hazard for the user, the unit or possible misuse.
Important notice.
Connectors
18V
!
Make all connections whilst the preamplifier is disconnected from the power supply.
Take care to connect the left and right channels correctly. The right channel is usually marked red, the
left channel black or white.
Never use any other power supply than the one supplied with the unit.
Pre Out
A power amplifier or active loudspeakers can be connected to the output sockets marked Pre Out.
Subwoofer output
An active subwoofer can be connected to the output sockets marked Sub.
Record output, connecting a headphone amplifier
Out connects an analogue record device ore a Pro-Ject Head Box headphone amplifier.
Out provides a fixed output level.
Inputs
Line level sources such as CD player radio or TV can be connected to the input sockets marked 1- 4.
Remote power-on, switching voltage
The socket marked Trigger provides a 12V DC switched output voltage for remote power-on of units with this
facility (such as the Pro-Ject Amp Box DS or Pro-Ject Amp Box DS Mono), which corresponds to the position of
the stand-by switch (on/off) on the front panel.
A 45cm remote power-on cable (polarity
+
) is supplied with the Pro-Ject amplifiers for connecting the
remote-switched power socket to the Pro-Ject Pre Box DS. Longer cables are available from your Pro-Ject dealer.
Do not use this trigger output for any other connections for which it is not designed.
Mains power connection
Connect the low voltage plug from the power supply to the Power 18V "socket before connecting the power
supply to the mains.

© Audio Trade GmbH · Pro-Ject Pre Box DS · Revision 2013.1.15
3
Remote control
1
ON/OFF
short press turns the unit on, long press takes it back into standby.
Powered on, a short press activates and deactivates mute
0
_
VOL
and
0+
VOL
adjust the sound volume
CH+
CH-
VOL+
VOL-
ON/OFF
0
_
CH
and
0+
CH
select the inputs
Front panel controls
+
-
Pre Box DS
To switch on from standby or to standby
turns the unit on or back into standby (press and hold to switch into standby mode). The display shows
STANDBY when the unit is in standby.
While switching off, the unit saves the settings for input, volume and mute, to be set automatically after next
power on.
Dimming the display
Press and hold the buttons and will change the display brightness - full, half and one third.
Input selector
Pressing the buttons and repeatedly selects the inputs 1- 4in turns. The selected input will be shown in the
display.
Volume
Adjust the volume (63 steps) to the desired level using the buttons and . The volume level will be shown in
the display. -63dB indicates min., 00dB max..
Mute
While the unit is powered on, 0
ON/OFF
activates and deactivates mute .

© Audio Trade GmbH · Pro-Ject Pre Box DS · Revision 2013.1.15
4
Replacing batteries
Proceed as follows:
 Unlock and slide open the battery case cover
 Replace the battery.
Make sure the battery is the right way round !
 Close the battery case cover
Battery type: 1 x CR2032 / 3V or 1 x CR2025 / 3V
Do not dispose the batteries as ordinary domestic refuse. Please dispose your exhausted batteries at
the appropriate collection sites - usually located at supermarkets and drugstores.
Technical specifications Pro-Ject Pre Box DS
Frequency response: 20Hz - 20kHz (-0,3/-0,01dB)
Noise floor: -95dB (A weighted)
THD: 0,0035%
Gain: 13dB
Pre out: 1 pair RCA/phono sockets
Output voltage typically: 1V at 1kHz
Record and subwoofer out: RCA/phono sockets
Line-level inputs: 4 pairs RCA/phono sockets
Input impedance: 10kohms
Trigger: 12V DC switching voltage
Trigger output: 2-pole 2,5mm co-axial jack
Outboard power supply: 18V/500mA DC, suitable for your country's mains supply
Power consumption: 220mA DC, <1W in standby
Replacement battery remote control: 1 x CR2032 / 3V or 1 x CR2025 / 3V
Dimensions W x H x D (D with sockets): 103 x 72 x 144 (150)mm
Weight: 1.100g 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.
Safety instructions
!
AC outlet voltages vary from country to country. Before connecting to the mains, make sure that the
voltage in your area meets the voltage requirements printed on the power supply.
The power supply is used to disconnect the unit from the mains. Make sure that the power supply is easily
accessible at all times. Never handle the device, the power supply while your hands are wet or damp.
Avoid letting liquids enter the device or the power supply. Never place any item containing liquid,
such as a flower vase on or near the device. Never spill any liquid on the device or the power supply.
Never place any naked flame sources, such as lighted candles on or near the device. The product shall not
be used in damp or wet locations, next to a bathtub, sink, swimming pool or any other similar conditions.
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.