LDsystems HPA 2 2 Channel Headphone Amplifier User Manual

LDsystems HPA 2 2 Channel Headphone Amplifier

Product Information

You made the right choice! The HPA 2 headphone amplifier was developed and manufactured under high-quality requirements to ensure many years of trouble- free operation. LD Systems, with its name and experience as a manufacturer of high-quality audio products, stands behind this device. Please read the operating instructions carefully to make the most of your new LD Systems product.

Specifications:

• High-quality headphone amplifier
• 2-channel output
• LDHPA2 model
• Manufacturer: LD Systems

Product Usage Instructions

About This Manual:
The manual provides essential information for the proper use of the HPA 2 headphone amplifier.

Intended Use:
The HPA 2 is designed for amplifying headphone audio signals and is intended for use in audio setups requiring headphone amplification.

Explanations of Terms and Symbols:

• DANGER: Indicates immediately dangerous situations or conditions for life and limb.
• WARNING: Indicates potentially dangerous situations or conditions for life and limb.

Safety Instructions:
Follow all safety instructions provided in the manual to ensure safe operation of the device.

Connections and Operating Elements:
Refer to the manual for detailed information on connections, operating procedures, and display elements of the HPA 2 amplifier.

Care and Maintenance:
Proper care and maintenance are essential for the longevity and optimal performance of the HPA 2. Follow the guidelines provided in the manual.

Dimensions:
Refer to the dimensions section for information on the physical size of the HPA 2 amplifier.

Technical Data:
Find detailed technical specifications of the HPA 2 amplifier in this section to understand its capabilities.

Disposal:
Follow local regulations for the proper disposal of the HPA 2 amplifier at the end of its lifecycle.

Frequently Asked Questions (FAQ):

• Q: Can I connect multiple headphones to the HPA 2 simultaneously?
  A: Yes, the HPA 2 is designed to support multiple headphones for simultaneous use.

• Q: Is it possible to mount the HPA 2 under a table?
  A: Yes, the HPA 2 comes with instructions for under-table mounting for space- saving installation options.

YOU MADE THE RIGHT CHOICE!
This device was developed and manufactured under high quality requirements to ensure many years of trouble-free operation. This is what LD Systems stands for with its name and many years of experience as a manufacturer of high- quality audio products. Please read these operating instructions carefully so that you can quickly and optimally use your new LD Systems product. You can find more information about LD Systems on our website WWW.LD- SYSTEMS.COM.

ABOUT THIS MANUAL

• Read the safety instructions and the entire manual carefully before commissioning.
• Observe the warnings on the unit and in the operating instructions.
• Always keep the operating instructions within reach.
• If you sell or pass on the appliance, be sure to hand over these operating instructions as well, as they are an essential part of the product.

INTENDED USE

The product is a device for professional audio installation! The product has been developed for professional use in the field of audio installation and is not intended for use in households! Furthermore, this product is intended for installation by qualified persons with specialist knowledge and for operation by instructed persons! The use of the product outside the specified technical data and operating conditions is considered as not intended! Liability for damages and third party damages to persons and property due to non-intended use is excluded!
The product is not suitable for:

• Persons (including children) with limited physical, sensory or mental capabilities or lack of experience and knowledge.
• Children (children must be instructed not to play with the device).

EXPLANATIONS OF TERMS AND SYMBOLS

1. DANGER: The word DANGER, possibly in combination with a symbol, indicates immediately dangerous situations or conditions for life and limb.
2. WARNING: The word WARNING, possibly in combination with a symbol, indicates potentially dangerous situations or conditions for life and limb.
3. CAUTION: The word CAUTION, possibly in combination with a symbol, is used to indicate situations or conditions that may lead to injury.
4. ATTENTION: The word ATTENTION, possibly in combination with a symbol, refers to situations or states that can lead to damage to property and/or the environment.

• This symbol indicates hazards that can cause an electric shock.
• This symbol indicates dangerous spots or dangerous situations.
• This symbol indicates danger from hot surfaces.
• This symbol indicates danger from high volumes.
• This symbol indicates supplementary information on the operation of the product.
• This symbol denotes a device that does not contain any user-serviceable parts.
• This symbol indicates electrical equipment designed primarily for indoor use.

SAFETY INSTRUCTIONS

DANGER:

1. Do not open or modify the device.
2. If your device is no longer working properly, liquids or objects have gotten inside the device, or the device has been damaged in any other way, switch it off immediately and disconnect it from the power supply. This device may only be repaired by authorized specialist personnel.
3. For devices of protection class 1, the protective conductor must be connected correctly. Never interrupt the protective conductor. Protection class 2 devices do not have a protective conductor.
4. Ensure that live cables are not kinked or otherwise mechanically damaged.
5. Never bypass the device fuse.

WARNING:

1. The device must not be put into operation if it shows obvious signs of damage.
2. The device may only be installed in a voltage-free state.
3. If the power cord of the device is damaged, the device must not be put into operation.
4. Permanently connected power cords may only be replaced by a qualified person.

DANGER:

1. Do not operate the device if it has been exposed to severe temperature fluctuations (e.g. after transport). Humidity and condensation could damage the device. Do not switch on the device until it has reached the ambient temperature.
2. Make sure that the voltage and frequency of the mains supply correspond to the values indicated on the device. If the device has a voltage selector switch, do not connect the device until this is set correctly. Only use suitable power cords.
3. To disconnect the device from the mains at all poles, it is not enough to press the on/off switch on the device.
4. Ensure that the fuse used corresponds to the type printed on the device.
5. Make sure that appropriate measures against overvoltage (e.g. lightning) have been taken.
6. Note the specified maximum output current on devices with a power out connection. Make sure that the total power consumption of all connected devices does not exceed the specified value.
7. Only replace pluggable power cords with original cables.

DANGER:

1. Danger of suffocation! Plastic bags and small parts must be kept out of the reach of people (including children) with reduced physical, sensory or mental abilities.
2. Danger from falling! Make sure the device is installed securely and cannot fall. Only use suitable tripods or attachments (especially for fixed installations). Make sure accessories are properly installed and secured. Make sure that the applicable safety regulations are observed.

WARNING:

1. Only use the device in the manner intended.
2. Only operate the device with the accessories recommended and intended by the manufacturer.
3. During installation, observe the safety regulations applicable in your country.
4. After connecting the unit, check all cable routes to avoid damage or accidents, e.g. due to tripping hazards.
5. Be sure to observe the specified minimum distance to normally flammable materials! Unless this is explicitly stated, the minimum distance is 0.3 m.

ATTENTION:

1. There is a risk of jamming with moving components such as mounting brackets or other moving components.
2. In the case of units with motor-driven components, there is a risk of injury from the movement of the unit. Sudden device movement can cause shockreactions.

DANGER:

1. Do not install or operate the device near radiators, heat registers, stoves or other heat sources. Make sure that the device is always installed in such a way that it is sufficiently cooled and cannot overheat.
2. Do not place any sources of ignition such as burning candles near the device.
3. Ventilation openings must not be covered and fans must not be blocked.
4. Use the original packaging or packaging provided by the manufacturer for transport.
5. Avoid shock or shock to the device.
6. Observe the IP protection class and the environmental conditions such as temperature and humidity according to the specification.
7. Devices can be continuously developed. In the event of deviating information on operating conditions, performance or other device properties between the operating instructions and the device labeling, the information on the device always has priority.
8. The device is not suitable for tropical climate zones and for operation above 2000 m above sea level.

ATTENTION: Connecting signal cables can result in significant noise interference. Make sure that devices connected to the output are muted during plugging. Otherwise, noise levels can cause damage.

ATTENTION HIGH VOLUMES WITH AUDIO PRODUCTS!
This device is intended for professional use. The commercial operation of this device is subject to the applicable national regulations and guidelines for accident prevention. Hearing damage due to high volumes and continuous exposure: The use of this product can generate high sound pressure levels (SPL) which can cause hearing damage. Avoid exposure to high volumes.

NOTES FOR INDOOR INSTALLATION EQUIPMENT

1. Units for installation applications are designed for continuous operation.
2. Units for indoor installation are not weatherproof.
3. Surfaces and plastic parts of installation equipment can also age, e.g. due to UV radiation and temperature fluctuations. This does not usually lead to functional restrictions.
4. with permanently installed units, the deposition of impurities, e.g. dust, is to be expected. Be sure to observe the care instructions.
5. Unless explicitly stated otherwise on the unit, the units are intended for installation heights of less than 5 m.

PACKAGING CONTENT

Remove the product from the packaging and remove all packaging material. Please check the completeness and integrity of the delivery and notify your distribution partner immediately after purchase if the delivery is not complete or if it is damaged.

Included in the product packaging are:

• 1 x HPA2 headphone amplifier
• 1 x power supply unit
• 1 set of terminal blocks
• 1 mounting set for on-table or under-table mounting
• 1 set of rubber feet (pre-assembled)
• User manual

INTRODUCTION

Part of the TICA® series, the HPA 2 is a two-channel headphone amplifier designed to make monitoring flexible and easy. The two stereo line inputs have independent gain control. Connect using standard ¼” (6.35 mm) TRS jacks, and terminal block connections.

The HPA 2 comes with two headphone outputs and two line outputs using ¼” (6.35 mm) TRS jacks and two 3.5 mm headphone outputs connected in parallel to these. Daisy chain multiple units together for group listening environments. Input signal and clip LEDs help you keep everything in check. The configuration switches let two people listen to the same stereo signal with independent volume control, or listen to independent mono signals per headphone channel, acting as two independent headphone amplifiers. Further options let you configure the volume knobs for individual headphone volume control or configure one knob for global headphone volume control and the other as a separate monitor output level control.

The HPA 2 works with high-impedance headphones and very low impedances down to 16 Ohms. Its capacitor-free output stage means that the frequency response is not affected no matter what type of headphones you use – low or high impedance.

Its tiny (106 x 53 x 225 mm) form factor and included mounting plates allow it to be installed discreetly. Alternatively, it fits into ¼ 19 inch rack. Use the optional rack tray to slot up to four TICA® series products alongside each other and build a system to your exact requirements, using minimal rack space. A great monitoring solution for audio professionals.

FEATURES

• Two-channel headphone amplifier
• Two balanced line inputs with independent gain controls
• Two balanced line-level outputs
• Signal and clip LEDs on each channel
• Suitable for both low and high-impedance headphones
• External 100 – 240V power supply

CONNECTIONS, OPERATING AND DISPLAY ELEMENTS

1. POWER IN
   Low-voltage socket for supplying power to the device. To avoid damage to the device, please use only the original power supply (power supply unit included).

2. STRAIN RELIEF
   Use the strain relief for the flexible cable of the power supply unit to protect the extra-low voltage socket, the extra-low voltage plug and the cable of the power supply unit from damage and to prevent the plug from being pulled out unintentionally.

3. LINE IN 1 + 2
   Analogue audio inputs with balanced terminal block connections. The +, – and G poles are for the balanced input signal (suitable for unbalanced cabling). Terminal blocks are included in the packaging content. Only use the inputs with the terminal strip connections and the jack sockets alternatively.

4. LINE IN 1 + 2
   Analogue audio inputs with balanced 6.3 mm jack sockets. Only use the inputs with the terminal strip connections and the jack sockets alternatively.

5. GAIN 1 + 2
   Potentiometer for the input sensitivity of the line inputs LINE IN 1 and 2.

6. LINE OUT 1 + 2
   Analogue audio outputs with balanced 6.3 mm jack sockets.

7. HEADPHONES 1 + 2
   Headphone outputs with 6.3 mm stereo jack sockets. The 6.3 mm sockets on the rear are wired in parallel with the 3.5 mm sockets on the front and can be used together if necessary. Make sure that the total impedance of the headphones used in parallel does not fall below 16 ohms.

8. SETTINGS

   • Switch 1 STEREO / MONO
     STEREO: A stereo signal present at LINE IN is routed to in stereo at the headphone outputs on the rear and front panel and at the line output LINE OUT 1 / 2.
     MONO: A stereo signal present at LINE IN is summed mono at the headphone outputs on the rear and front panel. Line output LINE OUT 1 / 2 is stereo.

   • Switch 2 HP+MON / HP
     HP+MON: A signal applied to LINE IN is routed to to the headphone outputs on the rear and front panel and to LINE OUT (e.g. for driving active studio monitors). The volume of PHONES 1 and 2 is adjusted with VOLUME 1 on the front panel, the volume of LINE OUT 1 / 2 with VOLUME 2.
     HP: A signal applied to LINE IN is routed to the headphone outputs on the rear and front and to LINE OUT 1 / 2. The volume of PHONES 1 is adjusted with VOLUME 1 on the front panel, the volume of PHONES 2 with VOLUME 2. The Line output level is not affected by any volume control.

9. ON / OFF SWITCH AND POWER SYMBOL
   Press the push button to switch the device on and again to switch it off. As soon as the HPA2 is correctly connected to the power supply and switched on, the power symbol lights up white.

10. HEADPHONES 1 + 2
    Headphone outputs with 3.5 mm stereo jack sockets. The 6.3 mm sockets on the rear are wired in parallel with the 3.5 mm sockets on the front and can be used together if necessary. Make sure that the total impedance of the headphones used in parallel does not fall below 16 ohms.

11. VOLUME 1 + 2
    Depending on the setting of the Settings switch on the back, the level controls have different functions.
    SETTINGS – HP: One level control each for headphone outputs 1 and 2.
    SETTINGS – HP+MON: VOLUME 1 controls the volume of the headphone outputs PHONES 1 and 2. VOLUME 2 controls the volume of the LINE OUT output.
    Turning to the right increases the volume, turning to the left decreases it. To avoid hearing damage, set the volume to minimum before using headphones or in-earphones and loudspeakers. Afterwards, increase the volume only slowly. Caution, high volume can damage hearing permanently.

12. SIG 1 + 2 (SIGNAL)
    As soon as an audio signal is present at the headphone outputs or the LINE OUT output, the corresponding signal indicator lights up white.

13. CLIP 1 + 2
    The red CLIP indicator lights up when the corresponding output is overdriven. If this occurs, reduce the volume level. Failure to do so may result in distorted sound reproduction and damage to the amplifier and the headphones or loudspeakers.
    AIR VENTS
    To prevent damage to the device, do not cover the ventilation openings on the left and right sides and on the top and bottom of the device and ensure that air can circulate freely. Covering the ventilation openings on the top or bottom of the enclosure when mounting it underneath or on top of a table is not critical, as the cooling provided by the ventilation openings on the remaining sides is sufficient.

CONNECTION EXAMPLES

TERMINAL STRIP CONNECTIONS

CONNECTIONS LINE IN

ATTENTION: When wiring terminal blocks, please observe the correct assignment of the poles/terminals. The manufacturer accepts no liability for damage caused by faulty wiring!
Tip: For wiring analogue line inputs and outputs it is preferable to use balanced audio cables.

UNDER / ON-TABLE MOUNTING
There are two recesses on the top and bottom of the enclosure, each with two M3 threaded holes, for mounting underneath or on top of the table. Screw the two enclosed mounting plates to the top or bottom using the enclosed M3 countersunk screws. Now the amplifier can be fixed in the desired position (see illustration, fixing screws not included). For tabletop mounting, the four rubber feet must be removed beforehand.

CARE, MAINTENANCE AND REPAIR

To ensure the proper functioning of the unit in the long term, it must be cared for regularly and serviced as required. The need for care and maintenance depends on the intensity of use and the environment.

We generally recommend a visual inspection before each start-up. Furthermore, we recommend that you carry out all the maintenance measures listed below every 500 operating hours or, in the case of low-intensity of use, after one year at the latest. Defects caused by inadequate care may result in limitations of the warranty claims.

CARE (CAN BE CARRIED OUT BY THE USER)

WARNING! Before carrying out any maintenance work, disconnect the power supply and, if possible, all appliance connections.
NOTE! Improper care can lead to impairment or even destruction of the unit.

1. Housing surfaces must be cleaned with a clean, damp cloth. Make sure that no moisture can penetrate the unit.
2. Air inlets and outlets must be regularly cleaned of dust and dirt. If compressed air is used, make sure that damage to the unit is prevented (e.g. fans must be blocked in this case).
3. Cables and plug contacts must be cleaned regularly and freed from dust and dirt.
4. In general, no cleaning agents, disinfectants or agents with an abrasive effect may be used for maintenance, otherwise the surface finish may be impaired. Especially solvents, such as alcohol, can impair the function of the housing seals.
5. Units should generally be stored in a dry place and protected from dust and dirt.

MAINTENANCE AND REPAIR (BY QUALIFIED PERSONNEL ONLY)

• DANGER! There are live components in the device. Even after disconnecting the mains connection, there may still be residual voltage in the device due, for example, to charged capacitors.
• PLEASE NOTE! There are no user-serviceable assemblies in the device.
• PLEASE NOTE! Maintenance and repair work may only be carried out by sufficiently qualified specialist personnel. If in doubt, consult a specialist workshop.
• PLEASE NOTE! Improperly performed maintenance work may affect warranty claims.
• PLEASE NOTE! For conversion or retrofit sets provided by the manufacturer, it is essential to observe the enclosed installation instructions.

DIMENSIONS

TECHNICAL DATA

DISPOSAL

Packaging:

1. Packaging can be fed into the reusable material cycle using the usual disposal methods.
2. Please separate the packaging in accordance with the disposal laws and recycling regulations in your country.

Device:

1. This device is subject to the European Directive on Waste Electrical and Electronic Equipment, as amended. WEEE Directive Waste Electrical and Electronic Equipment. Old devices and batteries can not be disposed of in household waste. The old device or batteries must be disposed of via an authorized waste disposal company or a municipal waste disposal facility. Please observe the applicable regulations in your country!
2. Observe all disposal laws applicable in your country.
3. As a private customer, you can obtain information on environmentally friendly disposal options from the seller of the product or the appropriate regional authorities.

MANUFACTURER’S DECLARATIONS

MANUFACTURER’S WARRANTY & LIMITATION OF LIABILITY
Adam Hall GmbH, Adam-Hall-Str. 1, D-61267 Neu Anspach / E-Mail Info@adamhall.com / +49 (0)6081 / 9419-0.
Our current warranty conditions and limitation of liability can be found at:
https://cdn-shop.adamhall.com/media/pdf/MANUFACTURERS- DECLARATIONS_LD_SYSTEMS.pdf .
In case of service, please contact your sales partner.

UKCA-CONFORMITY
Hereby, Adam Hall Ltd. declares that this product meets the following guidelines (where applicable)
Electrical Equipment (Safety) Regulations 2016
Electromagnetic Compatibility Regulations 2016 (SI 2016/1091)
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulation 2012 (SI 2012/3032)
Radio Equipment Regulations 201 7(SI 2016/2015)

UKCA-DECLARATION OF CONFORMITY
Products that are subject to Electrical Equipment(Safety)Regulation 2016, EMC Regulation 2016 or
RoHS Regulation can be requested at info@adamhall.com. Products that are subject to the Radio
Equipments Regulations 2017 (SI2017/1206) can be downloaded from www.adamhall.com/compliance/

CE CONFORMITY
Adam Hall GmbH hereby confirms that this product meets the following guidelines (where applicable):
R&TTE (1999/5/EC) or RED (2014/53/EU) as of June 2017.
Low Voltage Directive (2014/35/EU)
EMC Directive (2014/30/EU)
RoHS (2011/65/EU)
The complete Declaration of Conformity can be found at www.adamhall.com.
Furthermore, you can also request it at info@adamhall.com.

CE DECLARATION OF CONFORMITY
Declarations of conformity for products subject to the LVD, EMC, RoHS Directive
can be requested from info@adamhall.com.
Declarations of conformity for products subject to RED Directive
can be downloaded from www.adamhall.com/compliance/.

Subject to misprints and errors, as well as technical or other modifications!

Adam Hall GmbH | Adam-Hall-Str. 1 | 61267 Neu-Anspach | Germany
Phone: +49 6081 9419-0 | adamhall.com
Adam Hall Ltd. | The Seedbed Business Centre | SS3 9QY Essex | UK

References

• Eventtechnik Lösungen | Adam Hall Group
• LD Systems® | Your Sound. Our Mission.
• Eventtechnik Lösungen | Adam Hall Group
• Downloads | Service | Adam Hall Shop
• LD Systems® | Your Sound. Our Mission.

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