Pro-Ject Amp Box DS2 - Box Design by Pro

Pro-Ject Amp Box DS2
Dear music lover,
Thank you for purchasing an amplifier from Pro-Ject Audio Systems.
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
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 cord is
used to disconnect the unit from the mains. Make sure that the power cord is easily accessible at all
times. Never handle the device, the power cord/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.
Tubes produce heat. Proper ventilation has to be guaranteed all the time. The unit must not be stacked.
Make all connections whilst the amplifier 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.
The red speaker terminals carry the positive signal (+), the black speaker terminals the negative
signal (–). Make sure the polarity of the connection is correct at each end of the cables.
Only connect one loudspeaker with an impedance not less than 4 ohms per channel.
Never use any other power supply than the one supplied with the unit.
Connection to the preamplifier
The RCA/cinch sockets marked Left / Right In are for connecting the cables from your pre-amp or AV
processor. Sockets marked Left / Right Out are input bypass.
Connection to the speakers
The output terminals accept loudspeaker cables terminated with 4mm ∅ Banana plugs, spades connectors
or naked wire.
© Pro-Ject Audio Systems · Pro-Ject Amp Box DS2 (from SN: 17A004755) · Revision 2017.03.07
Mains power connection and methods to switch the unit on and off
Connect the low voltage plug from the power supply to the 2x48V= socket of the amplifier before
connecting the power supply to the mains. Amp Box DS2 can be switched on and off by using 2 different
1. Using front pushbutton to switch on or into standby
The pushbutton on the front panel of the unit alternately turns the power on or returns it to standby
mode. The blue LED on the front panel shows that the unit is powered on.
Please note: If a trigger signal is present Amp Box DS2 can’t be switched off by the pushbutton.
2. Remote power on - triggers
Amp Box DS2 can be switched on via other Box Design components when a 12V trigger voltage is present at
) in diverse lengths are
the 2.5mm socket marked Trigger Input. Special power-on cables (polarity
available as accessories. The remote power-on signal can be relayed to further units via the Trigger Output
socket. When the 12V trigger signal is switched off, Amp Box DS2 will also switch off.
Trigger cables may only be plugged into the sockets when the amplifier is disconnected from the
power supply and from the mains. Failure to do so may result in damage of the unit.
Technical specifications Pro-Ject Amp Box DS2
Power output
Frequency response:
Channel separation:
Noise floor:
Pre in
Input sensitivity
Input impedance
Speaker connectors:
Trigger in and out
Outboard power supply:
Power consumption:
Dimension (W x D x H):
Weight (without power supply):
2 x 100W/140W at 8ohm/4ohm (both channels driven)
10Hz - 50kHz (0dB, -3dB)
>40dB at 20kHz
<0.1% at 90W
2 pair RCA (bypass input-output)
550mV (100W, 4ohms)
4mm banana plugs
12V switching voltage
2-pole coaxial 2,5mm jack
+-48/2,5ADC, suitable for your countries mains supply
2,5A DC, <1W in standby
206 x 194 x 68 aluminium;
240 x 194 x 69 wood
1670g aluminium,
2130g wood
© Pro-Ject Audio Systems · Pro-Ject Amp Box DS2 (from SN17A004755): · Revision 2017.03.07
Should you encounter a problem which you are not able to alleviate or identify, please contact your dealer for
further advice. Only if the problem cannot be resolved there, the unit should be sent to the responsible
distributor in your country.
The manufacturer accepts no responsibility for damage caused by not adhering to these instructions
for use. Modification or changes 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, trademarks
Pro-Ject Audio Systems is a registered Trademark of
H. Lichtenegger.
This guide was produced by: Pro-Ject Audio Systems
Copyright © 2017. 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.
© Pro-Ject Audio Systems · Pro-Ject Amp Box DS2 (from SN: 17A004755) · Revision 2017.03.07
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