Pro-Ject Audio Systems Head Box S2 User manual

INSTRUCTIONS FOR USE

Pro-Ject Head Box S2

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

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.

Connection to the amplifier / signal sources

Connect the Fixed output of your amplifier or source (like CD players, streamers, D/A converters, etc) to the

In RCA sockets of the headphone amplifier.

Bypass output

The unit is equipped with a pair of analogue loop output RCA sockets on the back panel, this output will

pass on the signal untouched to an additional amplifier. Connect the Out RCA socket to a line input on your

amplifier.

Front panel

Headphone connection

The unit offers two sockets for headphones: one 3.5mm jack and one 6.3mm jack. Headphone outputs can

be used simultaneously.

In case of using two headphones at the same time, the output power is split into each headphone

according to their impedance values

Stand-By

The button on the front panel of the unit alternately turns the power on or returns it to standby mode. The blue

LED above the stand-by push button shows that the unit is switched on.

Volume

Adjust the volume to the desired level by using the knob on the right side of the front panel. Listening at too

loud volumes can damage your hearing, we advise to listen at moderate levels.

Technical data

Output power 725mW (into 32ohms)

Signal to noise ratio -110dBV

THD +N < 0.002%

Gain 11dB

Crosstalk 68dB

Frequency response 20Hz - 80kHz (+- 0,2dB)

Analogue inputs 1 pair RCA/Cinch

Headphone output 1x 6.3mm jack, 1x 3.5mm jack

Analgoue loop out 1 pair RCA/Cinch

Power supply 5V/0.5A DC

Standby Power Consumtion <0,5W

Dimensions W x H x D 103 x 37 x 120mm

Weight 365g without power supply

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.

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