HPAMP106 - Headphone amplifier Proel - Free user manual and instructions

Product Type	6-Channel Headphone Amplifier
Number of Channels	6 Stereo Headphone Outputs
Audio Inputs	4 Stereo/Mono (6.35 mm Jack)
Audio Outputs	6 Stereo Headphones (6.35 mm Jack)
Maximum Output Power	193 mW per channel into 32 ohms
Minimum Load Impedance	16 ohms per output
Maximum Gain	+13 dB per channel
Distortion	< 0.02% THD
Noise Floor	< -98 dBu
Frequency Response	20 Hz – 20 kHz (-3 dB)
Power Supply	100-120 V~ or 220-240 V~, 50-60 Hz (selectable)
Power Consumption	15 W
Dimensions (W x H x D)	480 x 44 x 210 mm
Weight	3.9 kg
Form Factor	19-inch Rack, 1U
Controls	Volume (6x), Input Selector (6x)
Indicators	Blue Power LED
Maintenance and Cleaning	Clean with a dry cloth; check ventilation openings
Safety	Internal protection fuse (replacement by qualified personnel)
Warranty	24 months

Frequently Asked Questions - HPAMP106 Proel

How to connect headphones to the HPAMP106?

Plug your stereo headphones (impedance ≥ 16 Ω) into the 6 front HEADPHONES outputs. Use stereo 6.35 mm Jack cables.

Can I use mono headphones?

No, the outputs are stereo. A mono headphone will only reproduce one channel. Use an adapter if necessary.

How to select the source for each output?

Each output has a front INPUT SEL selector. Turn it to choose input 1 to 4, or OFF to mute the signal.

What cable to use to connect an audio source?

Use 6.35 mm Jack cables. Prefer balanced cables for long distances. The inputs accept both balanced and unbalanced signals.

How to set the power supply voltage?

On the rear, the LINE VOLTAGE selector allows to choose between 115 V (105-120 V~) and 230 V (210-240 V~). Caution: an error may damage the device.

What to do if the fuse blows?

Turn off and unplug the device. Replace the fuse with an identical model (same ratings). If the problem persists, contact Proel support.

How to clean the device?

Use a dry, soft cloth. Regularly check that the ventilation slots are not blocked by dust, remove it with a brush or compressed air.

Can I mount the HPAMP106 in a rack?

Yes, it is in 19-inch (1U) format. Secure it with appropriate screws to the rack rails. Ensure sufficient ventilation.

What is the maximum power delivered per output?

193 mW per channel into 32 ohms. For low-impedance headphones, the available power will be higher.

Is the HPAMP106 under warranty?

Yes, the warranty is 24 months from the date of purchase, covering defects in materials and workmanship. Keep your proof of purchase.

USER MANUAL HPAMP106 Proel

CONNECTIONS (FIG.2) 6

SAFETY AND PRECAUTIONS 7

IN CASE OF FAULT....7

CE CONFORMITY....7

PACKAGING, SHIPPING AND COMPLAINT ..... 7

WARRANTY AND PRODUCTS RETURN ..... 8

INSTALLATION AND DISCLAIMER 8

POWER SUPPLY AND MAINTENANCE ..... 8

FCC COMPLIANCE NOTICE 8

GENERAL INFORMATION 9

OPERATING INSTRUCTIONS (FIG. 1 / 2) ..... 9

INDICE

SPECIFICHE TECNICHE 3

PANNELLO DI CONTROLLO (FIG.1)....6

CONNESSIONI (FIG.2)....6

AVVERTENZE PER LA SICUREZZA ..... 11

IN CASO DI GUASTO 11

CONFORMITÀ CE....11

IMBALLAGGIO, TRASPORTO E RECLAMI ..... 11

GARANZIE E RESI 12

ALLGEMEINE INFORMATIONEN....17

CONNEXIONS (FIG.2) 6

MISES EN GARDE DE SÉCURITÉ ..... 19

EN CAS DE PANNE....19

CONFORMITÉ CE....19

EMBALLAGE, TRANSPORT ET RÉCLAMATIONS .. 20

GARANTIES ET RETOURS 20

INSTALLATION ET LIMITES D'UTILISATION ..... 20

ALIMENTATION ET MAINTENANCE ..... 20

INFORMATIONS GÉNÉRALES ..... 21

INSTRUCTIONS POUR LE FONCTIONNEMENT (FIG. 1 / 2). .21

ÍNDICE

CARACTERÍSTICAS TÉCNICAS ..... 5

PANEL DE CONTROL (FIG.1) 6

CONEXIONES (FIG.2)....6

Model HPAMP106
System Type 6-channel headphone amplifier

Input Section
Inputs 4 stereo / mono
Input impedance 47 Kohm
Max input level +25 dBu
Connectors 2 x 1/4" jack unbalanced (each input)
Output Section
Outputs 6 stereo
Maximum output (2x) 193 mW @ 32 ohm (each)
Load impedance minimum 16 ohm per channel
Max gain +13 dB each channel
Connector 1/4" jack stereo (each output)
System performance
Distortion THD < 0.02%
Noise	< -98 dBu unweighted
Frequency response	20 Hz - 20 kHz (-3 dB)
General
Controls	OUT LEVEL, INPUT SELECTOR
Indicators	Power ON
Power supply 100-120 VAC or 220-240 VAC, 50-60 Hz
Consumption	15 W
Dimensions (W x H x D)	480 x 44 x 210 mm
Weight	3,9 Kg

LINE IN, various OUT
Jack (unbalanced)
*note: connect both cold and ground to
make cable from balanced to unbalanced
LINE IN, OUT vari
Jack (sbilanciato)
*nota: connettere insieme cold e ground
per cavi da bilanciato a sbilanciato

① tip-hot (+) ② cold (-) ③ ground (+)

verschiedene LINE IN und OUT
Klinkenstecker (unsymmetrisch)
*hinweis: bei Verbindung von symmetrisch zu
unsymmetrisch Cold und Masse zusammen anschließen
LINE IN, OUT divers
Jack (asymétrique)
*note : brancher ensemble cold et ground
pour câbles de symétrique à asymétrique
LINE IN, OUT varios
Jack (desbalanceado)
*nota: correcte juntos cold y ground para
cables de balanceado a desbalanceado
خطدخل: خط خروج متعددة
موصلصوت (غيرمتوازن)
لتما: ربط لبرد و الأرضى مea
للكابلات بناية من المتوازن وحنى غير المتوازن

① op - port ② ring - gate ③ above-ground (4)

PHONES
Stereo Jack
PHONES
Jack stereo
PHONES
Stereo-Klinkenstecker
PHONES
Jack stéréo
PHONES
Jack estéreo
هانف
مرضّل صوت ستزیر

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 of where and how they can take this item for environmentally safe recycling. Business users should contact their supplier and check the terms and conditions of the purchase. This product should not be mixed with other commercial wastes for disposal.

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure, that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

The information contained in this publication has been carefully prepared and checked. However no responsibility will be taken for any errors. All rights are reserved and this document cannot be copied, photocopied or reproduced in part or completely without written consent being obtained in advance from PROEL. PROEL reserves the right to make any aesthetic, functional or design modification to any of its products without any prior notice. PROEL assumes no responsibility for the use or application of the products or circuits described herein.

SAFETY AND PRECAUTIONS

- CAUTION: before using this product read carefully the following safety instructions. Take a look of this manual entirely and preserve it for future reference.

When using any electric product, basic precautions should always be taken, including the following:

- To reduce the risk, close supervision is necessary when the product is used near children.

- Protect the apparatus from atmospheric agents and keep it away from water, rain and high humidity places.

- This product should be site away from heat sources such as radiators, lamps and any other device that generate heat.

- This product should be located so that its location or position does not interfere with its proper ventilation and heating dissipation.

- Care should be taken so that objects and liquids do not go inside the product.

- The product should be connected to a power supply mains line only of the type described on the operating instructions or as marked on the product. Connect the apparatus to a power supply using only power cord included making always sure it is in good conditions.

- ⚠ WARNING: The mains plug is used as disconnect device, the disconnect device shall remain readily operable.

- Do not cancel the safety feature assured by means of a polarized line plug (one blade wider than the other) or with a earth connection.

- Make sure that power supply mains line has a proper earth connection.

- Power supply cord should be unplugged from the outlet during strong thunderstorm or when left unused for a long period of time.

- Do not place objects on the product's power cord or place it in a position where anyone could trip over, walk on or roll anything over it. Do not allow the product to rest on or to be installed over power cords of any type. Improper installations of this type create the possibility of fire hazard and/or personal injury.

- This product may be capable of producing sound levels that could cause permanent hearing loss. Exposure to extremely high noise levels may cause permanent hearing loss. Individuals vary considerably in susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a period of time. The U.S. Government's Occupational Safety and Health Administration (OSHA) has specified the permissible noise level exposures shown in the following chart. According to OSHA, any exposure in excess of these permissible limits could result in some hearing loss. To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pressure levels use hearing protectors while the equipment is in operation. Ear plugs or protectors in the ear canals or over the ears must be worn when operating the equipment in order to prevent permanent hearing loss if exposure is in excess of the limits set forth here. Keep your's attention that children and pets are more susceptible to excessive noise levels.

Duration Per DayIn Hours	Sound Level dBASlow Response	TypicalExample
8 90 Duo in small club
6	92
4 95 Subway Train
3	97
2 100 Very loud classical music
1.5	102
1 105 Traffic noise
0.5	110
0.25 or less	115 Loudest parts at a rock concert

IN CASE OF FAULT

• In case of fault or maintenance this product should be inspected only by qualified service personnel when:
• There is a flaw either in the connections or in the supplied connecting cables.
  – Liquids have spilled inside the product.
  – The product has fallen and been damaged.
  – The product does not appear to operate normally or exhibits a marked change in performance.
• The product has been lost liquids or gases or the enclosure is damaged.
• Do not operate on the product, it has no user-serviceable parts inside, refer servicing to an authorized maintenance centre.

CE CONFORMITY

• Proel products comply with directive 2004/108/EC (EMC), as stated in EN 55103-1 and EN 55103-2 standards and with directive 2006/95/CE (LVD), as stated in EN 60065 standard.
- Under the EM disturbance, the ratio of signal-noise will be changed above 10dB.

PACKAGING, SHIPPING AND COMPLAINT

• This unit package has been submitted to ISTA 1A integrity tests. We suggest you control the unit conditions immediately after unpacking it.
• If any damage is found, immediately advise the dealer. Keep all unit packaging parts to allow inspection.
• Proel is not responsible for any damage that occurs during shipment.

- Products are sold "delivered ex warehouse" and shipment is at charge and risk of the buyer.

- Possible damages to unit should be immediately notified to forwarder. Each complaint for package tampered with should be done within eight days from product receipt.

WARRANTY AND PRODUCTS RETURN

- Proel products have operating warranty and comply their specifications, as stated by manufacturer.

- Proel warrants all materials, workmanship and proper operation of this product for a period of two years from the original date of purchase. If any defects are found in the materials or workmanship or if the product fails to function properly during the applicable warranty period, the owner should inform about these defects the dealer or the distributor, providing receipt or invoice of date of purchase and defect detailed description. This warranty does not extend to damage resulting from improper installation, misuse, neglect or abuse. Proel S.p.A. will verify damage on returned units, and when the unit has been properly used and warranty is still valid, then the unit will be replaced or repaired. Proel S.p.A. is not responsible for any "direct damage" or "indirect damage" caused by product defectiveness.

INSTALLATION AND DISCLAIMER

- Proel products have been expressly designed for audio application, with signals in audio range (20Hz to 20kHz). Proel has no liability for damages caused in case of lack of maintenance, modifications, improper use or improper installation non-applying safety instructions and at the state of the art.

- Proel S.p.A. reserves the right to change these specifications at any time without notice.

POWER SUPPLY AND MAINTENANCE

• Clean only with dry cloth.
• Check periodically that the slots for its proper ventilation and heating dissipation are not obstructed by dust, remove the dust using a dry brush or a compressed air gun.
• The apparatus of Proel have been designed with CLASS I construction and must be connected always to a mains socket outlet with a protective earth connection (the third grounding prong).
• Before connecting the product to the mains outlet make certain that the mains line voltage matches that shown on the rear of the product, a tolerance of up to ± 10% is acceptable.
• ⚠ THE REPLACEMENT OF FUSES INSIDE THE APPARATUS MUST BE MADE ONLY BY QUALIFIED PERSONNEL.
• CHECK THE CONDITION OF THE PROTECTION FUSE, ACCESSIBLE OUTWARD, ONLY WITH THE APPARATUS SWITCHED OFF AND DISCONNECTED FROM THE MAINS LINE OUTLET.
• REPLACE THE PROTECTION FUSE ONLY WITH SAME TYPE AS SHOWN ON THE PRODUCT.
• IF AFTER THE SUBSTITUTION, THE FUSE INTERRUPTS AGAIN THE APPARATUS WORKING, DO NOT TRY AGAIN THEN CONTACT THE PROEL SERVICE CENTRE.

FCC COMPLIANCE NOTICE

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation.

CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

GENERAL INFORMATION

Thank you for having chosen a PROEL product.

The HPAMP106 is a 6-channel Headphone Amplifier boxed in a 19" rack mountable metal chassis, including up to 6 independent high-power amplifier sections suitable for virtually any type of headphones,

HPAMP106 features 4 selectable main stereo/mono inputs with 14 JACK connectors (REAR panel). The signal is amplified and sent to 6 stereo headphone outputs with individual level controls, input selector and 14 JACK connectors (FRONT panel), each one with +13dB max output level (per channel). Each output is capable of driving 16 ohm output load impedance. HPAMP106 is powered by a Built-in power supply with shielded transformer and voltage selector.

OPERATING INSTRUCTIONS (FIG. 1 / 2)

1. HEADPHONES stereo jack outputs

These are the 6 STEREO JACK connectors for the headphones output: only stereo headphones with a minimum impedance of 16 Ohms should be connected to these outputs. The stereo jack connectors are wired as follow:

Tip = positive LEFT channel signal

Ring = positive RIGHT channel signal

Sleeve = common negative shield or ground for both channels

2. VOL headphones volume controls

These controls set individually the level of each HEADPHONES output. The signal of the 6 outputs is selected between the four inputs.

3. INPUT SEL input channel selectors

Using these selectors you can choose which one of the 4 available inputs is sent to the respective headphones output. In the OFF position no input is selected.

4. PWR indicator

BLUE LED: when lighted indicates that the HPAMP106 has been turned on and AC power is available.

5. INPUT - LEFT (MONO) jack

These are the 4 JACK connectors for the four stereo channel inputs. Each LEFT (MONO) is a female jack connector, which accepts a JACK plug from almost any line level equipment with a balanced or unbalanced outputs. If the correspondent RIGHT jack is not inserted, the channel operate like a MONO channel with the LEFT (MONO) input as a single signal source. The JACK input is wired as follows:

Tip = + positive or "hot"

Ring = - negative or "cold"

Sleeve = shield or ground

When connecting an unbalanced signal, wire them as follows:

Pin2 / Tip = + positive or "hot"

Pin 1-3 / Sleeve = shield or ground

NOTE: whenever possible, use always balanced cables. Unbalanced lines may also be used but may result in noise over long cable runs. In any case, avoid using a balanced cable for one channel and an unbalanced one for the other.

6. INPUT - RIGHT jack

This is a JACK connector, which accepts a balanced or unbalanced line level input signal from almost any source. This is used only in presence of LEFT jack input to use the channel as STEREO. Wiring is the same of previous point.

7. LINE VOLTAGE selector

This switch sets the AC voltage line of your country (usually it is set by factory and isn't necessary to change it). The 115V setting is for mains line in the range of 100-120V\~ and 230V setting is for mains line in the range of 210-240V\~.

WARNING: an incorrect setting of AC LINE VOLTAGE could damage seriously the internal electronics!

8. POWER switch

HPAMP106 is "ON" when the switch is in the "I" position.

9. FUSE holder

Here is where the mains protection fuse is placed.

REPLACE THE PROTECTION FUSE ONLY WITH SAME TYPE AS SHOWN ON THE PRODUCT.

IF AFTER THE SUBSTITUTION, THE FUSE INTERRUPTS AGAIN THE APPARATUS WORKING, DO NOT TRY AGAIN THEN CONTACT THE PROEL SERVICE CENTER.

10. AC\~ socket

Here's where you plug in the mains supply cord. You should always use the mains cord supplied with the HDAMP106. Be sure the unit is turned off before you plug in the cord.

INSTRUCTIONS POUR LE FONCTIONNEMENT (FIG. 1 / 2)