Pro-Ject Audio Systems Pro-Ject Head Box S User manual

INSTRUCTIONS FOR USE
Pro-Ject Head Box S

© Audio Trade GmbH · Pro-Ject Head Box S · Revision 2013.1.15
2
Dear music lover,
thank you for purchasing a PRO-JECT AUDIO 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, 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.
Connections
Pro-Ject Audio Systems, Vienna, Austria
In Out
Right
LeftLeft Right 18V
!
Make all connections, except the connection to the headphone, whilst the unit 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.
Please turn the volume level to minimum before connecting the headphone.
Minimum impedance of the head phone 30ohms.
Never use any other power supply than the one supplied with the unit.
Connection to the amplifier (recorder)
Connect the TAPE / RECORD OUT RCA/phono sockets from your amplifier to the In RCA/phono sockets of
the headphone amplifier. The Out RCA/phono sockets of the headphone amplifier can be connected to the
input sockets of your recorder.
Alternatively analog sources like CD player or tuner can be reconnected to the In RCA/phono sockets directly.
Connecting a headphone, volume control
Connect the headphones to the ¼“ (6,3mm ) jack socket on the front of the headphone amplifier. Use the
control knob to adjust the level to the required volume.
Headphone replay
Use the input selector of the amplifier to choose the source you wish to hear.
Mains power connection
Connect the low voltage plug from the power supply to the Power 18V "socket before connecting the
power supply to the mains.

© Audio Trade GmbH · Pro-Ject Head Box S · Revision 2013.1.15
3
To switch on from standby or to standby
The push button on the left hand side will toggle the unit between its fully operational status and standby. The
blue LED above the stand-by push button shows that the unit is switched on.
Technical specifications Pro-Ject Head Box S
Power output: 330mW/30ohms, 60mW/300ohms
Headphone connection: >30ohms
Signal to noise: 112dB (A weighted) at full output
Frequency response: 30Hz – 20kHz/-0,05dB (10Hz – 120kHz/-1dB)
THD (IMD): 0,003% (0,002%)
Gain: 11dB
Headphone jack: 3-pole ¼“ (6,3mm ) co-axial jack
Line-level output: 1 pair RCA/phono sockets
Outboard power supply: 18V/500mA DC, suitable for your country's mains supply
Power consumption: 100mA DC, <1W in standby
Dimensions W x H x D (D with sockets): 103 x 36 x 104 (109)mm
Weight: 600g without power supply
Potential incorrect use and fault conditions
No signal on one or both channels:
No connection between headphone and headphone amplifier ore amplifier. This could be due
to a faulty plug, broken wire or solder joint or simply loose plug/socket connection.
Headphone does not work:
Headphone volume control is at minimum.
Amplifier Tape-Monitor circuit is not activated.
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 when the problem cannot be resolved there should the
unit 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 change 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
PRO-JECT is a Registered Trademark of H. Lichtenegger.
This guide was produced by: Audio Trade GmbH
Copyright ©2011. 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.