Pro-Ject Stereo Box DS2 Instructions

Pro-Ject Stereo Box DS2

Dear music lover,Thank you for purchasing an integrated 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

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 connect/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.


  1. Make all connections except the connection to the headphone and USB whilst the unit is disconnected from the mains.
  2. Never connect or disconnect the power supply to or from the unit whilst the power supply is connected to the mains. Never use any other power supply than the supplied one, with the exception of dedicated Power Boxes which can replace original power supplies.
  3. Take care to connect the left and right channels of RCA inputs correctly. The right channel is usually marked red, the left channel black or white.
  4. Speaker connections for the left speaker are located on the right hand side of rear view above, connections to right speaker are located on the left side. Speaker connectors marked red represent + according indicators on speaker terminal.

Mains power connection and methods to switch the unit on and offConnect the low voltage plug from the power supply to the Power 36V DC socket of the unit before connecting the power supply to the mains. Stereo Box DS2 can be switched on and off by using 2 different methods which are equal in priorities.

  1. Using front pushbutton to switch on or into standbyThe 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. If a trigger signal is present Stereo Box DS2 can’t be switched off by the pushbutton.
  2. Remote power on – triggersStereo Box DS2 can be switched on via other Box Design components when a 12V trigger voltage is present at the 2.5mm socket marked Trigger Input. Special power-on cables (polarity ) in diverse lengths are 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, Stereo 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.

Line outputA power amplifier or active loudspeakers can be connected to the output sockets marked Var Output.

Record output, connecting a headphone amplifierFix Output connects an analogue record device or a Pro-Ject Head Box headphone amplifier.

Connection to the speakersThe output terminals accept loudspeaker cables terminated with 4mm Banana plugs, spades connectors or naked wire.

Phono inputConnect the tonearm signal lead to the Phono input of the amplifier. The MM/MC switch on the back panel allows to adapt to connected cartridge type. The earthing wire may be connected to the screw terminal if you encounter hum problems when using the turntable.

Line inputsLine level sources such as CD player, radio or TV can be connected to the input sockets marked In2, In3 or In4.

Remote control

Front panel controls

Input selectorAfter the unit is powered on, pressing the buttons and next to the LEDs inputs indicators select desired input.

VolumeAdjust the volume to the desired level, using the large knob on the front panel.

Connecting a headphoneConnect the headphones to the ¼“ (6,3mm) jack socket on the front of the unit. Once headphone jack is connected into the socket, rear panel outputs are muted.+6dB buttongain of the preamplifier for all inputs is increased by 6dB if pressed

BT connection

Make sure the antenna is attached to its connector In5 BT on the back panel prior using BT. If the Pair LED is on, active audio connection with BT device is established.

Pairing with Android devicesOpen Settings and tap on BT. Turn on BT and tap on Scan. Searched devices will show up. Tap on Stereo Box DS2 and confirm presented pairing code on your Android device. Then press Pair button on MaiA DS(alternatively Blank button on remote control) when the blue Pair LED starts blinking. When paired with Stereo Box DS2, your Android device will show “Connected to media Audio”. Now you can play music from your Android device over BT to Stereo Box DS2.

Older devices may request a pairing code. Enter “0000” and confirm. No more confirmation on Stereo Box DS2 is then needed.

BT pairing with Apple devicesTap on Settings, tap on BT, turn on BT. Your device will automatically start searching for available devices. Tap on Stereo Box DS2 and confirm by pressing Pair button on Stereo Box DS2 (alternatively Blank button on remote control) when the blue Pair LED of is blinking.

A new connection is only possible if the Pair LED is off (it indicates that no device is connected).

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 Stereo Box DS2

Power Output @ THD+N=1%:                2 x 135W/4 ohms and 2 x 80W/8 ohmsChannel separation:                                                    > 65dB at 10kHzNoise floor:                                                    > -85dB (20Hz – 20kHz)THD+N:                                                            < 0,03% @ 3WGain:                                                                 32 dB (measured via line level input),Frequency response:                                 20Hz – 25kHz (max. deviation -0,1dB +0,2dB)

Headphone amp

Power Output @ THD+N=1%:                200mW (into 300ohms)Signal to noise ratio                                                      -110dBTHD +N                                                            < 0,05%Gain                                                                  11dBCrosstalk                                                         65dBFrequency response       20Hz – 80kHz (+- 0,2dB

Line level inputs:                                          3 pairs RCA cinch connectorsLine input sensitivity:                                 320mV(78W/8 Ohms)Line input sensitivity + 6 dB:                          160mV (78W/8 Ohms)Line input impedance:                                                   50kohmsPhono input:                                                 1 pair RCAPhono input sensitivity:                            suitable for MM, MI and MC cartridgesPhono input impedance:                                        MM 47k ohms / MC 100 ohmsPhono input gain:                                        MM 42 dB/ MC 58 dBVariable line level output:                        1 pair RCABT range:                                                        10 meters in direct visibility between source and receiverTrigger input:                                                 12V on/off detectorTigger output:                                               12VOutboard power supply:                          36V/5,5A DC, suitable for your country’s mains supplyReplacement battery remote control: 1 x CR2032 / 3V or 1 x CR2025 / 3VDimension (W x D x H):                            206 x 240 x 71 aluminium; 240 x 240 x 72 woodWeight (without power supply):         1 770 g aluminium, 2000 g wood

ServiceShould 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.

WarrantyThe 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 © 2019. 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.

Windows®, Windows XP®, Windows Vista®, Windows 7®, Windows 8®, Windows 10® are trademarks of the Microsoft group of companies. Mac® and Mac OS® are trademarks of Apple Inc., registered in the U.S. and other countries. TOSlink® is a registered trademark of Toshiba corporation. DSD and the DSD logo are trademarks of Sony Corporation.

© Pro-Ject Audio Systems · Pro-Ject Stereo Box

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