User Manual
Contents
1. 10 CID CIA BY PRO JECT AUDIO SYSTEMS INSTRUCTIONS FOR USE Pro Ject Head Box RS 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 V Warning of a hazard for the user the unit or possible misuse 4 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 connect 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 tem containing liquid V 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 Tubes produce heat Proper ventilation has to be guaranteed all the time The unit must not be stacked Connections Output Unbalanced RIGHT Output Balanced j Pro Ject Audio Systems Vienna Austria Make all connections except the connecti2. right side of the amplifier selects active input socket on the rear panel XLR or RCA Pro Ject Audio Systems gt Pro Ject Head Box RS Revision 2014 7 21 3 Technical specifications Pro Ject Head Box RS Power output 350mW at 32 ohms 60mW at 300ohms Crosstalk 58dB Frequency response 20Hz 20kHz 0 2dB 0 05dB THD N 0 17 XLR in output impedance setting 5 ohm load 32 ohm Gain 9dB S N ratio 99dB Headphone jack 3 pole 4 6 3mm co axial jack Line level input l pair RCA 1 pair XLR Line level output 1 pair RCA 1 pair XLR Outboard power supply 20V 3A DC suitable for your country s mains supply Power consumption 1 3A DC Dimensions W x H x D D with sockets 206 x 72 x 200 209 mm Weight 2150g 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 Service Should you encounter a problem which you are not able to alleviate or identity 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 15 for use Modification or change to
3. 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 Audio Systems is a Registered Trademark of The information was correct at the time of going to H Lichtenegger press The manufacturer reserves the right to make This guide was produced by Pro ject Audio Systems changes to the technical specification without prior Copyright 2014 All rights reserved notice as deemed necessary to uphold the ongoing process of technical development 4 Pro Ject Audio Systems Pro Ject Head Box RS Revision 2014 7 21
4. on 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 y marked red the left channel black or white Please turn the volume level to minimum before connecting the headphone Connection to the amplifier Connect the TAPE RECORD OUT RCA or XLR sockets from your amplifier to the Input RCA XLR sockets of the headphone amplifier Alternatively analog sources like CD player or tuner can be connected to the Input RCA or XLR sockets directly The Output RCA XLR sockets of the headphone amplifier ACT AS Loop Out of the inputs and can be connected to the input sockets of other audio equipment or a recorder Mains power connection Connect the low voltage plug from the power supply to the Power 20V DC socket before connecting the power supply to the mains 2 Pro Ject Audio Systems Pro Ject Head Box RS Revision 2014 7 21 e Head Box RS Power switch The rocker switch on the left side will turn the unit on or off The blue LED above the switch shows that the unit is switched on Connecting a headphone volume control Connect the headphones to the Y 6 3mm jack socket on the front of the headphone amplifier Use the control knob to adjust the level to the required volume Output impedance selector Output impedance of the amplifier can be chosen with OUT switch 5 20 50 Ohms Input selector Switch on the
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