Art Audio ART-HEADAMP4 KOPFHÖRER-VERSTÄRKER HEADAMP4 Data Sheet

The headphone amplifi er is used to distribute an audio signal to four headphone channels. The inputs and 
outputs may only be connected to the connections of audio devices.
This product may only be operated with the enclosed power supply unit. The power pack may only be 
connected to a mains outlet with 100-240 V AC/50/60 Hz of the public grid. No other electrical power supply 
is permitted.
The product may be used only in enclosed indoor locations, never outdoors. Contact with moisture, for 
example in bathrooms, must be avoided.
Any use, other than that described above, may lead to damage to this product and involves other risks, such 
as short circuit, fi re and electric shock.
No part of the product may be modifi ed or rebuilt.

  

 The warranty will be void in the event of damage caused by failure to observe these safety 
instructions. We do not assume any liability for any resulting damage.

•   Prior to commissioning, check the device for damage. If the device is damaged, you must not use it.
•   For safety reasons, any unauthorised conversion and/or modifi cation to the product is not permitted.
•  The headphone amplifi er may only be operated via the supplied power unit.
•   The power pack has been designed in protection class II and may only be operated on a mains socket of 

the public grid.

•  The power unit may never be plugged in or unplugged with wet hands.
•   The device is still connected with the mains when it is switched off. To disconnect it from the power supply 

completely, the power pack must be pulled out from the mains socket.

•   Check the device for damage frequently. Do not touch the power pack, the headphone amplifi er or the 

connection cable if they show visible damage. First, switch off the power at the mains socket (e.g. with the 
corresponding circuit breaker), and then carefully unplug the power supply unit from the mains socket. Do 
not use the product afterwards, but take it to a specialist workshop.

•   Never replace a damaged connecting cable of the power pack. If the connecting cable is damaged, the 

power cable is unusable and must be disposed of. Do not repair it.

•   Do not listen to excessively loud music for long periods of time. This may damage your hearing. This is 

especially the case when playing back using headphones.

•   Keep electrical devices out of the reach of children. For this reason, be particularly careful when using the 

device in the presence of children. They may try to stick objects into the device through openings in the 
casing.

•   Do not expose the device to high temperatures, dripping or spraying water, strong vibrations or heavy 

mechanical stress.

•  Use the device only in temperate climate regions and not in tropical ones.
•   Never position vessels or containers containing liquids, such as glasses, buckets, vases or plants, in the 

direct vicinity of the product. Liquids may seep into the casing and thus impair the electrical safety of the 
device. Furthermore, there is a signifi cant risk of fi re or a lethal electric shock! In such an event, isolate 
the mains socket to which the product is connected (e.g. switch off the automatic fuse) and unplug the 
power pack from the mains socket. Afterwards, the product can no longer be used; take it to a specialist 
workshop.

•  Do not place open sources of fi re such as burning candles on the appliance.
•  Never use the product without supervision.
•  Please observe the additional safety instructions in the individual chapters of this manual.
•   Do not leave packaging material lying around carelessly. It may become a dangerous plaything for chil-

dren.

•   If you have doubts about how the equipment should be operated or how to connect it safely, consult a 

trained technician.

•  In commercial institutions, the accident prevention regulations of the Employer’s Liability Insurance 

Association for Electrical Systems and Operating Facilities are to be observed.

•   If in doubt about how to connect the product correctly, or should any questions arise that are not answered 

in these operating instructions, please contact our technical service or another specialist.

•  High-quality headphone amplifi er with four, separately adjustable outputs
•  3.5 mm and 6.3 mm stereo socket connections
•  The power is supplied via the enclosed power unit
•  Solid and stable metal housing

(1)   Volume control (4x) 

(3) 

Connection 12 V/DC

(2)   Operation indicator 

(4)  

STEREO OUT connections (4x)

 

 

(5)  

STEREO IN connection

Select a level, fl at and stable mounting location.
Protect valuable furniture surfaces by using an appropriate underlay; otherwise, it may cause scratches.

•  Connect the output from your audio source to the STEREO IN connection (5).
•  Connect your headphones with the connections STEREO OUT(4).

    The 3.5 mm and 6.3 mm stereo jacks are stereo-wired and connected in parallel. Only one 

socket per channel should be used. 

•  Plug the low-voltage plug of the power unit into the 12 V/DC connection (3).
•  Plug the power unit into the mains socket.
•  As soon as the headphone amplifi er is supplied with current, the operation indicator (2) is lit.

  

 Turn the volume control (1) fully to the left before you plug or unplug, put on or connect 
the headphones to the power supply. Otherwise, there is risk of damage to your hearing 
as a result of excessive volume from the headphone output.

•  Connect the device to the power supply as described above.
•  Start the playback on your audio source device.
•   Adjust the headphone’s volume with the corresponding volume controls (1). Each channel has a separate 

volume control.

Please use a soft, dry, clean cloth for cleaning.
Do not use any chemical cleaning agents, as they can discolour the casing surface.

     Electronic devices are recyclable waste materials and must not be disposed of in the household 

waste!

 

 Dispose of an unserviceable product in accordance with the relevant statutory regulations.

Operating voltage ........................100-240 V/50/60 Hz (power pack)
 

12 VDC (headphone amplifi er)

Input.............................................1 x stereo jack (3.5/6.3 mm)
Output  .........................................4 x stereo jack (3.5/6.3 mm)
Harmonic distortion factor ............<0.01 %
S/N ratio .......................................>90 dB
Input level max. ...........................+14 dBV
Output level max. .........................+20 dB per channel
Output impedance .......................51 ohm per channel
Dimensions (W x H x D) ..............150 x 38 x 75 mm
Weight .........................................590 g

 

  

   These operating instructions are a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1,  

D-92240 Hirschau (www.conrad.com). 

 

 All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfi lming, 
or the capture in electronic data processing systems require the prior written approval by the editor. 
Reprinting, also in part, is prohibited. 

 

 These operating instructions represent the technical status at the time of printing. Changes in         
technology and equipment reserved.