LD Systems HPA 4 User manual

USER`S MANUAL

pOWER ADApTER 24 V DC

WWW.LD-sYsTEMs.COM

THANk YOU FOR CHOOsINg LD-sYsTEMs!

We have designed this product to operate reliably over many years. Therefore LD-Systems guarantees for high quality
products with its name and many years of experience as a producer.
Please, take a few moments to read these instructions carefully, as we want you to enjoy your new LD-Systems
products quickly and to the fullest.
For information about LD-Systems check out our website WWW.LD-SYSTEMS.COM

pREVENTIVE MEAsUREs

1. Please read this information carefully.

2. Keep all information and instructions in a safe place.

3. Please follow the instructions.

4. Please observe all warnings. Don‘t remove safety instructions or any other information located on the device.

5. Use the device only in the intended manner.

6. Use only stable and appropriate stands and/or mounts when the device is permanently installed. Make certain
that wall brackets are firmly secured. Make certain that the unit is installed securely and cannot fall down.

7. When installing please observe the corresponding safety standards for your country.

8. Do not install the device near radiators, heat accumulators, ovens or other sources of heat. Make certain that
the device is always installed so that is cooled sufficiently and cannot overheat.

9. Do not place open sources of ignition, e.g., burning candles, on the device.

10. Do not cover ventilation slots.

11. Do not operate the device in the immediate vicinity of water. Do not expose this equipment to combustible
materials, liquids or gases.

12. Please make certain that dripping or splashing water cannot get inside the device. Do not put objects filled
with fluids, such as vases or drinking vessels, on top of the device.

13. Make certain that objects cannot fall into the device.

14. Use the device only with accessories with which the manufacturer intends the device to be used.

15. CAUTION: If this device has a mains connector equipped with protective earth, it must be connected to a
mains socket with a protective ground connection. Never disable the function of the protective ground connection
of the included power cord.

16. Do not turn on the device immediately if it was exposed to strong temperature fluctuations (for example after
transportation). Moisture and condensation may damage the device. Leave the device switched off until it has
reached room temperature.

17. Do not open the device and do not make any changes to the device.

18. Before connecting to mains power, make certain that the mains voltage and the mains frequency are the
same as the operating values of the device (see type label). If the device is equipped with a supply voltage selec­tor switch, make certain that the values of the device match the values of the mains power before connecting.
If the plug on the included cord does not fit your mains outlet, contact your electrician.

19. Make certain that the power cord is not stepped on. Protect the power cord against pinching, especially at
the device plug and the power plug.

20. In order to prevent damage or accidents, for example, due to tripping hazards, check all connections once
you have connected the device.

21. When connecting the device, make certain that the power plug remains readily accessible.
Always pull out the power plug when the device is not in use or when you clean the device. Disconnect the
power cord by pulling the plug not the cable. Never touch the power cable and power adapter with wet hands.

22. Avoid switching the device on and off at short intervals, because it may shorten the durability of the device.

23. IMPORTANT: Replace fuse only by fuse of same type and rating! If fuse blows repeatedly please contact
authorized service center!

24. In order to disconnect the device completely from the mains voltage, the power plug must be unplugged.

25. If your device is equipped with a Volex power connector, the matching Volex device plug must be unlocked
in order to disconnect it. This also means that a tug on the power cord can pull the device out of place, thus
causing personal injuries and/or property damage. Thus please make certain to route your cables carefully.

26. If there is a risk of lightning strike or during extended periods of disuse, unplug the power plug.

27. During transport, make certain that the equipment being transported cannot fall down and possibly
cause personal injuries and/or property damage.

LD HpA4

4 Channel Headphone Amplifier

28. If your device no longer works properly, if it has been exposed to liquids or an object has fallen inside it or
if it has been damaged in some other manner, turn the device off immediately und unplug the power plug. This
device should be repaired only by authorized experts.

29. Use only a dry cloth to clean the device.

30. Comply with all of the disposal laws that are applicable in your country. During disposal, please separate
plastic and paper/cardboard.

31. Plastic bags must be kept out of the reach of children.

CAUTION! HIgH VOLUME!

This product is designed for professional use. Therefore the commercial use of this equipment
is liable to the rules and regulations of the Accident Prevention & Insurance Association of your industry sector.
Adam Hall as a manufacturer is bound to inform you formally about the existence of eventual sanitary risks. Risk of
hearing damage due to prolonged exposure to excessive volumes: This headphone amplifier is easily capable of ge­nerating sound pressure levels (SPL) sufficient to cause permanent hearing damage to performers, production crew
and audience members. Caution should be taken to avoid prolonged exposure SPL in excess of 90 dB.

LD sYTEMs HpA4 - A COMpACT AND pOWERFUL sTEREO HEADpHONE AMpLIFIER

The HPA4 has small dimensions, can handle up to 4 headphones and has an output power with no equal in its class.
That means high volume with no distortion. With these features the HPA4 is an essential tool for every project- and
home studio.

CONTROLs, INDICATORs AND CONNECTORs

2

3

1

1

Headphone output connectors 1 - 4.

2

Headphone volume 1 - 4.

3

Power LED

4

Line input. Both connectors can be used either as input or link output.

5

Stereo / Mono switch.

6

DC socket. Only use the supplied power adapter.

6

5

4

spECIFICATIONs

Max. Output Power: 4 x 100 mW

Input impedance: 1 kOhm

Minimum load per channel: 10 Ohm

Input Connectors: 2 x RCA, 6.3 mm jack stereo

Output Connectors: 4 x 6.3 mm jack stereo

Controls: 4 x headphone volume control, Stereo / Mono switch

Indicators: Power LED

Operating voltage: 24 V DC

Accessories: AC power adapter included

FEATUREs

• Compact and powerful

• Excellent sound

• High volume with no distortion

• Can handle up to 4 headphones

• For every project- and home studio

• Stereo / Mono switch

EC DECLARATION OF CONFORMITY

These devices meet the essential requirements and further relevant specifications of Directive 2004/108/EC (EMC).
For more information, see www.adamhall.com.

CORRECT DIspOsAL OF THIs pRODUCT (ELECTRICAL WAsTE)

(Applicable in the European Union and other European countries with separate collection systems)

This marking shown on the product or its literature, indicates that it should not be disposed with other household
wastes at the end of its working life. To prevent possible harm to the environment or human health from uncontrolled
waste disposal, please separate this from other types of wastes and recycle it responsibly to promote the sustainable
reuse of material resources.

Household users should contact either the retailer where they purchased this product, or their local government
office, for details on where and how they can recycle this item in an enviromentally friendly manner.

Business users should contact their supplier and check the terms and conditions of the purchase contract. This
product should not be mixed with other commercial wastes for disposal.

WEEE-DECLARATION

Your LD-Systems product was developed and manufactured with high quality materials and components wich can be
recycled and/or reused. This symbol indicates that electrical and electronic equipment must be disposed of separate­ly from normal waste at the end of its operational lifetime.
Please dispose of this product by bringing it to your local collection point or recycling centre for such equipment. This
will help to protect the environment in which we all live.

LIMITED WARRANTY

This Limited Warranty applies to the Adam Hall, LD Systems, Defender, Palmer, Cameo and Eminence branded
products.
The statutory warranty rights towards the seller are not affected by this guarantee. In fact, it justifies, additional
independent warranty claims towards Adam Hall.
Adam Hall warrants that the Adam Hall product you have purchased from Adam Hall or from an Adam Hall authorized
reseller is free from defects in materials or workmanship under normal use for a period of 2 years from the date of
purchase.
The Limited Warranty Period starts on the date of purchase. In order to receive warranty services you are required to
provide proof of the purchase date. Your dated sales or delivery receipt, showing the date of purchase, is your proof
of the purchase date. Should products of the brands named above be in need of repair within the limited warranty
period, you are entitled to warranty services according to the terms and conditions stated in this document.
This Limited Warranty extends only to the original purchaser of this Adam Hall branded product and is not transferab­le to anyone who obtains ownership of the Adam Hall branded product from the original purchaser. During the Limited
Warranty Period, Adam Hall will repair or replace the defective component parts or the product. All component parts
or hardware products removed under this Limited Warranty become the property of Adam Hall.
In the unlikely event that your Adam Hall product has a recurring failure, Adam Hall, at its discretion, may elect to
provide you with a replacement unit of Adam Hall´s choice that is at least equivalent to your Adam Hall branded product in
hardware performance.

Adam Hall does not warrant that the operation of this product will be uninterrupted or error-free. Adam Hall is not
responsible for damage that occurs as a result of your failure to follow the instructions included with the Adam Hall
branded product.
This Limited Warranty does not apply,

- to wear parts (e.g. accumulator)

- to any product from which the serial number has been removed or that has been damaged or rendered defective as
the result of an accident

- in case of, misuse, abuse, or other external causes - by operation outside the usage parameters stated in the user´s
documentation shipped with the product by use of spare parts not manufactured or sold by Adam Hall

- by modification or service by anyone other than Adam Hall
These terms and conditions constitute the complete and exclusive warranty