Pro-Ject Head Box Instructions
- June 7, 2024
- Pro-Ject
Table of Contents
BY PRO-JECT AUDIO SYSTEMS
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
Headphone impedance: 8 – 600Ohm
Output impedance: <1Ohm
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.
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.
© Pro-Ject Audio Systems · Pro-Ject Head Box S2 · Revision 2019.03.01