INSTRUCTIONS FOR USE
Pro-Ject Stereo Box S2
© Pro-Ject Audio Systems · Pro-Ject Stereo Box S2 · Revision 2018.10.25
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Dear music lover,
thank you for purchasing this 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
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 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.
Connectors
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.
Never use any other power supply than the one supplied with the unit.
Inputs
Line level sources such as CD player radio or TV can be connected to the input RCA sockets marked In1, In2
and also to the stereo 3.5mm jack socket In3.
Connection to the speakers
The output terminals accept loudspeaker cables terminated with 4mm Banana plugs, spades connectors
or naked wire.
Variable output
A power amplifier or active loudspeakers can be connected to the output sockets marked Variable Out.
Mains power connection
Connect the low voltage plug from the power supply to the Power 20V DC socket of the amplifier before
connecting the power supply to the mains.
© Pro-Ject Audio Systems · Pro-Ject Stereo Box S2 · Revision 2018.10.25
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Front panel controls
To switch on from standby or to standby
The push button on the left hand side will toggle the phono amplifier between its fully operational status and
standby. The blue LED above the stand-by push button shows that the unit is switched on.
Input selector
Press the push button next to the 3 LEDs to switch between the inputs. Selected input number will be illuminated.
Volume
Adjust the volume to the desired level, using the large knob on the front panel.
Remote control
turns the unit on or back into standby (long press), mute (short)
and adjust the sound volume
and select the inputs
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.
© Pro-Ject Audio Systems · Pro-Ject Stereo Box S2 · Revision 2018.10.25
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Troubleshooting
No music from my speakers:
- make sure power cables, audio interconnects and speakers are correctly connected to Stereo Box S2
- make sure volume level is properly set
- make sure the correct input is selected
Technical specifications Pro-Ject Stereo Box S2
Output power: 2 x 25W / 37W @ 8 / 4 ohms (both channels driven)
Frequency response: 20Hz - 20kHz (+ 0dB, - 0,5dB)
Signal to noise ratio: >85dBA / >75dB (IEC -A)
THD: <0,1% at 20W / 4 Ohms; < 0,05% at 10W /8 Ohms
Gain: 32dB
Line level inputs: 2 pair RCA, 1 x 3.5mm jack
Input sensitivity: 350mV
Input impedance: 25k ohms
Variable out: 3.5mm jack
Speaker connectors: 4mm ∅ banana plugs, spades connectors or naked wire
Outboard power supply: 20V/3A DC, 100 - 240V, 50/60Hz
Power consumption: 3A 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 37 x 115 (125) mm
Weight: 422g without power supply
Service
Should you encounter a problem which you are not able to alleviate or identify despite the above information,
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.
Warranty
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.
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