Pro-Ject Audio Systems Head Box S2 Digital Manuale utente

INSTRUCTIONS FOR USE

Pro-Ject Head Box S2 Digital

Dear music lover,

thank you for purchasing a Pro-Ject Audio Systems headphone amplifier.

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 possibilities:

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 socket on the back panel. Connect the Output RCA

socket to a line input on your amplifier.

Headphone connection

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

headphones are in use.

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.

Driver installation (Windows® operating systems only)

* For Windows®operating systems an USB driver (supplied on CD) has to be installed. Mac OS®operating

systems do not need an additional driver.

For example - Windows 7®and newer operating system:

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

select Speaker/ProJect Head 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

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

not necessary.

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 appropriate cables to connect to sources of digital signal like CD players,

streamers, TV set etc.

Front panel

Volume

Adjust the volume to the desired level using the knob on the right side of the front panel.

Input selector

After the unit is powered on, operating the button Input selects the inputs in turn. The selected input is

indicated by the LED´s (1-USB, 2-Co-axial, 3-Optical). Blinking LED indicates no signal.

DSD

LED is illuminated when streaming DSD data over USB input. (playback of DSD on Windows computer

requires driver from supplied CD) and a software player capable of playing DSD files.

Filters

Filter button select filters in turn:

1 - Optimal Transient

2 - Fast Roll off (Linear Phase Fast Roll off)

3 - Slow Roll off (Linear Phase Slow Roll off)

4 - Minimum Phase (Minimum Phase Slow Roll off)

5 - Apodizing Hybrid

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 1x ESS9038K2M 32-bit

Playback formats USB: up to DSD256, PCM up to 32b/768kHz

Optical: PCM up to 24b/96kHz

Coaxial: PCM up to 24b/192kHz

Filter settings 5 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 0,0007% at 0dB, 2V RMS, 1kHz

Dynamic range 120dBA

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): 360g

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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