Pro-Ject Audio Systems Pre Box S2 Digital User manual

INSTRUCTIONS FOR USE

Pro-Ject Pre Box S2 Digital

Dear music lover,

thank you for purchasing a Pro-Ject Audio Systems 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

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 or 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 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.

Mains power connection

The unit offers 2 possibilties:

1. USB input is not used: Connect the low voltage plug from the power supply to the micro-USB socket Power

5V DC before connecting the power supply to the mains.

2. USB input is in use: Unit can be powered directly from computer via USB input. In this case is highly

recommended to disconnect Power 5V DC cable from the unit - power disturbances from two power supplies

could affect sound performance.

Outputs

The unit is equipped by a pair of analogue output RCA sockets on the back panel and a headphone output

connector (Jack 6,3mm) on the front panel. Connect the Output RCA socket to a line input on your

amplifier.

Headphone connection

Connect the headphones to the socket on the front panel (Jack 6,3mm). Rear output is muted when

headphones are in use. Green headphone icon in the left top corner of the display indicates active

headphone output.

Inputs

The unit offers 3 digital inputs: USB, Optical and Co-axial

USB: is dedicated for connection to a Computer. Connect the USB input of the unit to a free USB-socket on

your computer and turn it on/make sure it is powered on.

Windows®10 operating systems support 24/192 playback (wasapi), installation of supplied (ASIO) driver is

not necessary.

Driver installation (Windows operating systems only)

For playing DSD files an USB driver (supplied on CD) has to be installed.

For example - Windows 7®and newer operating system:

Control Panel Hardware and Sound Sound Playback:

select Speaker/ProJect Pre Box S2 Digital

Properties Supported formats: make sure nothing is assigned

Level Sound: setting must be 100

Enhancements: disable all enhancements Advanced Default Format: set to studio quality 24/192

Please note: Connection should be made to an USB-socket of your computer directly. Connecting to

USB-hubs or switches can cause problems.

Co-axial and Optical: Use apropriate cables to connect to sources of digital signal like CD players,

streamers, TV set etc.

Remote control - Aluminium (optional accessory, standard plastic version has the same buttons)

MUTE activates and deactivates mute. Mute is indicated on the display.

Filter selects filters in turn

Menu access/exit menu, ↑and ↓change pages in menu, ▐◄◄ and

►►▌change value.OK exit menu

Volume + and - set volume level

▐◄◄ , ►►▌, ►▌▌allows to control player in computer: track +,

track-, play/pause

Front panel

Volume

Adjust the volume to the desired level from -80dB to 0dB, using the knob on theright side of the front panel.

Volume settings are stored separately for headphone output and RCA output.

Input selector

After the unit is powered on, operating the buttons marked with Input ▲,▼ select the inputs. The selected

input is indicated by its name (USB, OPT, COAX) when changed and then by a small icon in the bottom left

corner of the display. Small icon of selected input indicates whether the input is connected to the source or

not: white - connected, red - not connected

Sampling frequency (or DSD rate) of the input signal is displayed in the right bottom corner of the display.

front panels menu control:

Input buttons: list between pages

Volume changes the value

pages in menu offers following settings:

Distortion Compensate - enable / disable ESS on-chip distortion compensation feature

Audio Quality - test/Best : test: gives the best value when tested on measuring device (lowest distortion etc)

Best : Pro-Ject designers preffered sound setting.

SW version - display sw version

Filter setting

Optimal transient (Pro-Ject preffered)

Fast Roll off (Linear phase)

Slow Roll off (Linear phase)

Minimum Phase Fast

Minimum Phase Slow

Linear Apodizing

Hybrid Filter

Brickwall Filter

Filter setting and selected input are stored after turn off the unit.

Technical data

Digital inputs 1x USB (B), 1x Co-axial (RCA), 1x Optical (TOSLink)

D/A-converter 2x ESS9038Q2M 32-bit

Playback formats USB: up to DSD512 (DSD1024), PCM up to 32b/768kHz

Optical: PCM up to 24b/192kHz

Coaxial: PCM up to 24b/192kHz

Filter settings 8 different selectable on front

Frequency response 20Hz - 20kHz

Analogue outputs 6.3mm Headphone (front), 1x Variable Out (RCA)

Output voltage 2,05 Veff

Minimal recommended headphone impedance 8ohms

Headphone output power 6,6mW/600ohms, 68mW/32ohms

THD 0,0003% at 0dB, 2V RMS, 1kHz

Dynamic range 124dBA

Outboard Power supply 5V/1A DC (included)

Dimensions W x H x D 103 x 37 x 122 mm (including knob and connectors)

Weight (without power supply): 366g

Service

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.

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.

Pro-Ject Audio Systems is a registered Trademark of

H. Lichtenegger.

This guide was produced by: Pro-Ject Audio Systems

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. Dolby®is a registered trademarks

of Dolby Laboratories. DTS™is a registered trademark of DTS, Inc. DSD is a registered trademark of Sony

Corporation.

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