Head Box S2 - Receiver PRO-JECT - Free user manual and instructions

Product Type	Headphone Amplifier / Receiver
Brand	Pro-Ject
Model	Head Box S2
Dimensions (W x H x D)	Approx. 4.5 x 1.5 x 5.0 inches
Weight	Approx. 0.5 lbs
Power Supply	External AC adapter (provided)
Input Connections	1x RCA stereo pair
Output Connections	1x 3.5mm headphone jack, 1x 6.3mm headphone jack
Gain Switch	Low / High gain for different headphone sensitivities
Frequency Response	20 Hz - 20 kHz ± 0.5 dB
Signal-to-Noise Ratio	> 105 dB
Total Harmonic Distortion	< 0.01%
Output Impedance	< 1 ohm
Maximum Output Power	130 mW @ 32 ohms
Headphone Compatibility	Impedance 16-600 ohms
Chassis Material	Aluminum
Color	Black
Remote Control	Not included
Manual Languages	English (PDF available for download)
Maintenance and Cleaning	Wipe with a dry cloth; avoid liquids and abrasives
Safety Precautions	Do not expose to moisture; use only supplied power adapter
Spare Parts and Repairability	Contact Pro-Ject support for service
General Information	Compact design, low noise, suitable for home and studio use

Frequently Asked Questions - Head Box S2 PRO-JECT

How do I connect the Head Box S2 to my audio source?

Use the provided RCA cable to connect the Head Box S2 to the line output of your audio source such as a CD player, DAC, or computer.

What headphones are compatible with this amplifier?

The Head Box S2 works with headphones having an impedance between 16 and 600 ohms. Use the gain switch for optimal matching.

How do I switch between low and high gain?

Locate the gain switch on the front panel. Slide to 'Low' for sensitive headphones and 'High' for high-impedance models.

Can I use the Head Box S2 as a preamplifier?

The device is designed primarily as a headphone amplifier. It does not have line outputs for use as a preamp.

What type of power adapter do I need?

Use only the supplied AC adapter with the correct voltage (e.g., 12V DC, 500mA). Using an incorrect adapter may damage the unit.

How do I clean the device?

Unplug the unit and wipe the chassis with a soft dry cloth. Do not use liquids or abrasive cleaners.

Does it have a remote control?

No, the Head Box S2 does not include a remote control. Volume is adjusted manually via the front knob.

What is the warranty period?

Pro-Ject typically offers a 2-year warranty on electronic components. Check your local dealer for exact terms.

How do I download the user manual?

Visit the Pro-Ject website or use the download link on the notice page to obtain the PDF manual for the Head Box S2.

The unit is not powering on. What should I check?

Ensure the power adapter is firmly connected to both the unit and a working outlet. If the issue persists, contact Pro-Ject support.

USER MANUAL Head Box S2 PRO-JECT

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 easier 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 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 Consumption <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.