Violectric HPA V 100, HPA V200 User Manual

Download

Page 1

HEADPHONE AMPLIFIER

HPA V 100

USER´s MANUAL

Page 2

Content

Theme Page

About Violectric 3 Safety Instructions 5 The Earth / Grounding Concept 7 Connection / Connectors 9 General 10 Operation 11 Special Functions 18 Things to know 19 Disposal 24 Technical Data 25 Jumper Setting 26 Conformity Statement 27 Warranty 28

THE HIGH OUTPUT LEVELS ACHIEVABLE

DAMAGE YOUR HEARING OR THE HEADPHONES

IF OPERATED CARELESSLY !!

CAUTION !!

WITH THIS UNIT MAY

Page 3

Cordial thanks for your decision in favour of a

product !

is a trademark and product line of Lake People

electronic GmbH. Lake People electronic GmbH develops, manufactures and distributes products in the professional range, for broadcast, television, airports, exhibition halls, festival venues, theatres, large-scale installations, private studios and more. In the private sector as well, Lake People products become increasingly popular due to their outstanding quality.

The supply the Hi-Fi and High-End market with its specific requirements.

trademark and product line is specially intended to

Who develops equipment ?

devices are exclusively developed in Germany by the engineers of Lake People electronic GmbH. In doing so, the team of developers can draw on twenty years of experience and countless products for the pro-audio domain. Among others, the first German-made 20-bit A/D and D/A converters were developed by Lake People in the early nineties of the past century.

Who manufactures equipment ?

devices are exclusively manufactured in Germany by Lake People electronic GmbH or contractors in the company's vicinity.

Lake People - and by association on domestic manufacturing. As well, all component suppliers are chosen

in order achieve the main part of added value inland.

- put high emphasis

Page 4

How do devices get to the customer ?

devices can be obtained from respective specialist suppliers. If there is none such accessible regionally, the customer is supported by transregional distribution partners (google may help...) and, of course, by Lake People electronic GmbH themselves.

… and if it doesn't work like it should ?

devices are covered by a 24-month warranty. In case of any malfunction during this period, they can be shipped to the manufacturer directly. Of course, the client will benefit from

's and Lake People's full technical support even when warranty has expired. Any technical questions or need for advice is welcome.

is a subsidiary of

LAKE PEOPLE electronic GmbH

Turmstrasse 7a

D-78467 Konstanz

Fon +49 (0) 7531 73678

Fax +49 (0) 7531 74998

www.violectric.de www.violectric.com

www.lake-people.de www.lake-people.com

Page 5

General Safety Instructions

WARNING

For your protection, please read the following:

Water, Liquids, Moisture:

This appliance should not be used near water or other sources of liquids. Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.

Power Sources:

The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.

Grounding:

Care should be taken that this appliance is operated with proper grounding only.

Power Cord:

Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance. This unit is equipped with a 3-pole mains cable with German 3-pin mains plug. In some countries this unit must be operated with a mains adaptor, supplied by the owner. Please refer to the table below to connect a mains plug:

OVERVIEW: POWER CORD FUNCTION AND COLORS

CONDUCTOR COLOR Alternativ

L LIVE BROWN BLACK

N NEUTRAL BLUE WHITE

E PROTECTIVE EARTH GREEN+YELLOW GREEN

U.K. Mains Plug Warning:

A moulded mains plug that has been cut off from the cord is unsafe. Discard the mains

plug at a suitable disposal facility.

NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR

CUT MAINS PLUG INTO A 13 AMP POWER SOCKET. Do not use the mains plug

without the fuse cover in place. Replacement fuse covers can be obtained from your local

retailer. Replacement fuses are 13 amps and MUST be ASTA approved to BS 1362.

Page 6

Mains Fuse:

The mains fuse of this appliance is soldered in place and accessible from the inside only!! A blown fuse may indicate an internal problem and should be replaced during qualified servicing or repair work !!

Switchable Power Supply:

Connect this unit to the power source indicated on the equipment rear panel only to ensure safe operation !! This unit is provided with an internally settable mains supply for 115 / 230 V AC.

Service / Repair:

To reduce the risk of fire or electric shock, the user should not attempt to service the appliance beyond the measures described in the operating manual. All other servicing or repair should be referred to qualified personnel !!

VOR DEM ÖFFNEN NETZSTECKER ZIEHEN!! PULL MAINS BEFORE OPENI NG !! AV A NT D´OUVRIE R RETIREZ LA FICHE MALE!!

Electromagnetic Compatibility This unit conforms to the Product Specifications noted as Declaration of Conformity at the end of this manual. Operation is subject to the following

conditions:

- this device may not cause harmful interferences

- this device must accept any interference received, including interference that may cause undesired operation

- this device must not be operated within significant electromagnetic field

Page 7

The Earth / Grounding Concept

General GROUND-LIFT Jumper (accessible from the inside. Mind the SECURITY INSTRUCTIONS !! ):

Ex-works this jumper is set to the LIFT position. The internal ground potential is “lifted” by means of this jumper. As a result, the interconnection for DC voltages and lower frequencies (< 150 Hz) will be cut. Higher frequencies will be bled off to earth potential through the RC filter. The LIFT position is helpful in case of hum or jitter caused by different ground/earth potentials. Of coarse full electrical protection is garanteed as the case is always connected to ground/earth potential !

See page 26 "Technical Appendix" for details.

Page 8

Unfortunately there is no general recommendation how to solve hum and jitter problems - or even minimize them. The best way to succeed is to check different options !! In case of balanced cables, it should always been verified if the shield of the cable is connected to the shell of the XLR connector. The shell is ALWAYS connected to earth potential when the connector is inserted !!

Concerning ANALOG inputs and outputs, the relationship between ground and earth may be modified. Electrical safety is always ensured, since the earth conductor is permanently connected to the enclosure !!

XLR GROUD-LIFT Jumper (accessible from the inside. Mind the SECURITY INSTRUCTIONS !! ):

G(ROUND): Ex-works all jumpers are set to "G" (ground) position.

Pin 1 is connected to the internal ground reference. High frequency interference is deflected to the case via a 100 nF capacitor.

L(IFT): The interconnection between Pin 1 and ground is open.

High frequency interference is deflected to the case via a 100 nF capacitor. This jumper position is specifically useful if the unit is equipped with transformers !!

C(ASE): Pin 1 is connected to the case, the 100 nF capacitor is

bridged. This jumper position may be varied together with the General GROUND-LIFT jumper.

Please note that with jumpers not in the ex-works position

EMC emission might occur,

for which the user is responsible only !

Page 9

Connection / Connectors for Analog Signals

ANALOG SIGNALS

HOT

COLD

SHIELD

SOURCE

BALANCED INCOMING SIGNAL

ANALOG SIGNALS

HOT

GND

SOURCE

SHIELD

BALANCED INCOMING SIGNAL

2-wire cable should be prefered !!

ANALOG SIGNALS

zum

Kopfhörer

XLR MALE PLUG

6.3 mm (1/4”) Phone Jack ( ip - ing - leeve Connector)

Balanced Cable (Signal) to (Transformer) Balanced Input

Shield = Signal Ground = Pin 1

Hot / + Phase = Pin 2

Cold / - Phase = Pin 3 The case of the connector should not be wired to the shield of the cable. The connector is routed to earth potential (PE) when plugged into the corresponding socket of the case !

Unbalanced Cable (Signal) to (Transformer) Balanced Input

Shield = Signal Ground = Pin 1

Hot / Signal = Pin 2

Cold / Ground = Pin 3 The case of the connector should not be wired to the shield of the cable. The connector is routed to earth potential (PE) when plugged into the corresponding socket of the case !

TR S

Tip = left Channel Ring = right C ha nn e l Sleeve = Ground

Page 10

GENERAL INFORMATION

The HPA V100 is a stereophonic headphone amplifier designed to drive low-, medium- and high-Z loads (16...600 ohms) as usually represented by high-quality headphones. Due to its specific, variable and low-noise and distortion circuit design especially optimised for dynamic headphones, the HPA V100 fulfils even highest demands.

Features:

- Balanced inputs with gold-plated Neutrik XLR connectors

- Unbalanced inputs with gold-plated ALPS cinch connectors

- switchable unbalanced outputs with cinch connectors

- PRE-GAIN = switchable input gain in five steps

- Independent-channel design

- DC-coupled (switchable)

- ALPS RK27 High-Grade volume control

- High-Quality op-amps in the signal path

- High-quality MKP capacitors in the signal path

- 0.1 and 1% metal film resistors throughout the unit

- Discrete-design power amp with 4 transistors per channel

- 2 silver-plated Neutrik headphone outputs

- delayed relay based headphone output cut-off

- Toroidal transformer

- Large filtering capacitors in the power supply

- Switchable ground lift

- Rugged aluminium case with Nextel coating

- Solid, laser-engraved aluminium front panel

With its small dimensions, the HPA V100 ensures optimum flexibility combined with high output power. During design, high emphasis was put on operational safety even when the unit is operated inappropriately. The HPA V100 is equipped with internal filters to prevent damage to the connected headphones due to high-frequency overload beyond the audible range.

Page 11

THE CASE

The HPA V100's case as well as the front/rear panels are made of solid aluminium. This choice of material ensures high mechanical stability and resistance.

EARTH AND GROUND

The HPA V100's case is grounded. Internal reference ground is bridged to protective earth by means of a jumper. If required, the jumper can be set to 'LIFT' position (see also: page 7 "Earth/Ground concept", page 26 "Technical Appendix").

POWER SUPPLY

Mains power is provided via a three-pin IEC/CEE socket and mating "cold-appliance" mains cord with Schuko-type plug. The device is set to 230V mains, whereas the actual voltage may vary between 190 and 240 volts for flawless operation. A toroidal transformer provides the internal operating voltages of +/-30V approx.

MAINS FUSE

The 0.25A time-lag fuse is soldered in place on the circuit board. In case, it must be replaced with a fuse of the same type only.

CAUTION !!

MIND THE SAFETY INSTRUCTIONS:

A blown fuse indicates an internal fault and

should be replaced during qualified repair or

servicing only !!

Page 12

BALANCED SIGNAL INPUTS

The balanced signal inputs are situated on the rear panel of the unit and are labelled as "BAL IN LEFT" and "BAL IN RIGHT". They are fitted with XLR sockets.

Please note:

Unbalanced signals can be injected as well by means of an adaptor. Also see page 9.

Balanced XLR pinout: PIN 1 GND PIN 2 (+) PHASE PIN 3 (-) PHASE

UNBALANCED INPUTS

For the use with unbalanced signals, cinch sockets are provided. They are labelled as "IN/OUT LEFT" and "IN/OUT RIGHT", and can be configured as either inputs or outputs (about their configuration, see page 26)

Cinch sockets as inputs:

The cinch sockets are factory-preset as inputs and are equipped with integrated switch contacts !

Page 13

When a cinch plug is inserted, it cuts possible signals applied to the balanced input automatically. I.e. the cinch input has priority. Input impedance for all inputs is 10 kohms. Maximum input level should not exceed +21 dBu. This value is reduced to +15/+9 dBu if PRE-GAIN is set to +6/+12 dB !!

Cinch socket as outputs:

The cinch sockets can also be operated as outputs. This offers the possibility of using a refreshed balanced input signal for further purposes. Output levels equal the levels applied to the inputs, i.e. the signal is amplified by 0dB (unity gain) at an output impedance of < 30 ohms.

See also: technical appendix, page 26.

Ex-works, the HPA V100 is set to "AC" response (12Hz).

Page 19

Things to know …

The HPA V100 offers balanced and unbalanced inputs.

Which advantages do balanced signals offer ?

In contrast to unbalanced signals, balanced signals are carried by two wires (plus ground/shield). In the transmitting device, a balanced signal is created by generating an inverted original signal (180ˆphase shifted). The "hot" wire carries the original signal (a), the "cold" wire the inverted signal (-a). In the receiving device, the balanced signal is processed by a differential amplifier, which detects the difference between both: (a) – (-a) = 2a. On its way between devices, the useful signal can be affected by interference (s). Interferences however are in phase on both wires and fed to the differential amplifier as well. Again, the amplifier detects the difference between the interference contents: (s) – (s) = 0. Thus - in an ideal situation - all interference on the signal path is eliminated.

Like mentioned above, the balanced signals are fed to differential amplifiers. From there - now being unbalanced - they get to the switching contacts of the cinch inputs. If a plug is inserted here, any balanced input signal possibly present is interrupted. I.e. unbalanced signals fed to the cinch inputs have priority. These signals are fed to buffer amplifiers - for left and right channel separately - which also provide the PRE-GAIN setting.

Why are discrete signal paths important ? Twin op-amps are the most common design for operational amplifiers, i.e. two amplifier circuits are integrated in one device. If left- and rightchannel signals are processed simultaneously by such a device, interaction between both cannot be excluded. This interaction is admittedly diminutive, but should be avoided whenever a different design offers the possibility.

Why are op-amps ideal for low-level signal processing ?

Discrete amplifiers (designed with transistors) are very popular in highend audio design also for preamplifier stages. This is often marketed as an optimization measure, but the partially exorbitant extra expenses are of course to be paid by the customer. But an op-amp consists of tranistors as well...

Page 20

Moreover, its structure has the advantage of thermal coupling between its internal components. Also ageing issues play a much less important role. Due to the large number of op-amps types offered, it is possible to pick an optimum type for any specific application.

Why does PRE-GAIN make sense ?

Two extreme examples (with the HPA V100 at 8dB gain, volume control set to full):

1st example:

The (pre-)amplifier provides 4V output voltage, whereas the headphone requires only 2V for 100dB sound pressure level.

With the control fully turned up, the V100 would deliver 10V output at 8dB gain. Therefore the volume control would have to be operated very carefully in order to avoid hearing damage. Moreover, any interference at the input should be avoided since it would be "unforgivingly" amplified as well. With PRE-GAIN, the input level can be reduced by 12dB (a fourth), with 1V instead of 4V as the result. This 1V is again amplified by 2.5, then equalling 2.5V. Now the volume control can be turned over almost the entire range.

2nd example::

The (pre-)amplifier provides 1V, whereas the headphone requires 20V to release 100dB of sound pressure.

With the volume control fully clockwise, the V100 would provide 2.5V at 8dB gain only - much to low for the headphone. By means of PRE-GAIN, input level can be boosted by 12dB (four times), resulting in effective 4V. These are again multiplied by 2.5, now equalling 10V. This is still not enough, but far closer to the optimum value: The headphone achieves 114dB sound pressure level.

Your HPA V100 may provide a USB input as an option. It has priority over all the other inputs and mutes these when a valid input signal is detected. Since the HPA V100 is a terminal device after USB regulations, it has a type-B interface.

Which USB devices can be connected to the HPA V100 ?

Connections can be established to tabletop or laptop PCs. MP3 players or similar gear cannot be connected.

Page 21

What about the quality of the USB input ? No matter if it's encoded MP3, CD audio with 16 bit or other audio files played back from the host, the USB input will also support high quality audio files with up to 24 bit and 44.1, 48 or 96 kHz sampling rate. The USB receiver forwards the data to a D/A converter offering 110 dB dynamic range and –100 dB THD+.

Why does 100% host volume setting make sense ? Volume control within the host is always accomplished digitally, i.e. bits are removed from the data stream. Therefore a signal attenuated by 12dB has only 12 active bits left and distortion increases to 0,4 %.

Can the USB signal be utilized any further ?

When the unbalanced cinch sockets of your HPA V100 are configured as outputs, the converted USB signal is available there in analog form and can be used to feed further external audio devices, like amplifiers e.g. See following...

The unbalanced inputs of your HPA V100 can be configured as unbalanced outputs. This function is provided in active manner - i.e. with buffer amplifiers - in order to decouple the output signal.

Why does an active feed-through make sense ?

Each electronic device presents input impedance as well as input capacitance. If several devices would be coupled passively - e.g. with "Y" adapters - the resulting input parameters could provoke malfunction and instabilities. A buffer amplifier "reconditions" the signal and makes it compatible with other devices due to its low-impedance output.

The HPA V100 is DC-coupled, i.e. it can transduce DC voltage as well. For good measure, a low-cut filter can be inserted by setting the corresponding jumpers. After input buffering, the signals are forwarded to a simple 6dB-per-octave filter stage which can be set to two characteristics: AC (12 Hz), or DC (0 Hz).

Why does frequency bandwidth limiting make sense ?

In signal processing, sound is represented by AC voltages. Sound is audible - for young people - from about 20 to 20000 Hz. The elder the listener, the less he will hear high frequencies in particular.

Page 22

In order to transmit these frequencies at optimum quality, the frequency response of an amplifier should be as wide and as "flat" as possible. At the low end of the scale, this limit is represented by DC, as there is no frequency lower than zero. In upward direction, the limit can be set to practically any frequency, but the higher, the more susceptible the device becomes concerning electro-magnetic interference. This is not audible in the first place, but may interfere with the useful signal and then become evident. Therefore, unrestricted frequency response attests thoughtlessness rather than remarkable engineering skill.

Here comes the volume pot.

Why is a good volume pot essential ?

A volume potentiometer is a mechanical control element, which can be obtained on the market at any low price. Meanwhile it is often replaced by electronic circuitry, exhibiting essential disadvantages concerning dynamic range, noise and distortion Conductive-plastic resistive tracks, high-quality multitap wipers and separated chambers for the individual sections are highly desirable for sophisticated applications, and high quality is inevitable to ensure troublefree operation for years. Since the market for really good pots is a small one, manufacturers like Noble or Panasonic don't offer these any more. A current sample of top of the line pots is the RK27 by ALPS, which is also used in your HPA V100..

The pot is followed by the power amplifier, which is operated at +/-30V supply voltage and designed with transistors since they make real sense at this stage. True power however is not required here. Each channel features four transistors: two small-signal BC546 / BC556 and two power transistors, all driven by a non-inverting NE5534 op-amp. Overall gain is set to 8dB ( factor 2.5). For high-impedance headphones, the power amplifier delivers one of the highest voltage swings available. For low-impedance headphones on the other hand there is power in abundance, with a damping factor of 400 !! At the same time, distortion and dynamic range represent the limits of the technically feasible. .

Why makes it sense to make such huge efforts ?

A headphone amplifier is a device designed to condition audio signals with regard to the very specific requirements of headphones. This doesn't

Page 23

sound too spectacular at the first glance and can be achieved relatively easily. As with many things however, the devil is in the details and much more effort is required to design one amplifier for all current headphone models. Headphones per se are quite diverse, and there are two essential parameters: impedance and sensitivity. In general, headphones with higher impedance can be regarded as less sensitive than headphones with low impedance (which is not generally true, but in the majority of cases). The sensitivity of headphones is usually stated in dB (sound pressure level) per milliwatt. Extremes in this sense are the AKG K1000 with 74dB/mW on the one hand, and the Sennheiser HD25 with108 dB/mW on the other hand: The K1000 requires 2500 times the power to achieve the same sound pressure as the HD25. There is also the fact that headphones with high impedance usually require much higher voltage to achieve high loudness. Thus the amplifier must be designed with high internal supply voltages.

Why is a high damping factor essential ?

When actuated, electro-dynamic systems respond with a counterforce. When the voice coil of a headphone has been displaced by the signal, an (error) current will be induced when it swings back to its initial position. This current must be suppressed as far as possible, which is effected best if the amplifier's output impedance is the lowest possible. The damping factor describes nothing but the ratio between output impedance of an amplifier and a given load. Since there is no known technical specifications, we define the load (voice coil impedance) as 50 ohms. This results in an output impedance of <0.12 ohms for the V100.

The power supply with its supersized toroidal transformer provides the power stage with +/-30 volts. The preamp stage is supplied with stabilized +/-18 volts.

Why are high supply voltages essential ?

A headphone doesn't really require high power, but from the equation P = U2 / R we can see that the square of the supply voltage determines the power into a given load resistance. The higher the headphone's impedance, the more voltage will be needed. But this deals with the achievable loudness to a limited extent only: Technically spoken, music

Page 24

lives on fast transients which put high demands on signal processing. And thus a fast transient can easily push an average amplifier with +/-15 volts supply to its limits. Due to out high supply voltage you will benefit from doubled output swing capability.

The headphone jacks are disconnected by relay during power-up / power-down.

Why does a relay make sense when switching power ?

Amplifiers generate unwanted output signals when applying or removing power, which can damage the connected headphones. The relay breaks the connection between amplifier and headphone and thus protects the latter until electrical conditions have stabilized.

DISPOSAL

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This symbol on the product or on its packaging indicates that this product shall not be treated as household waste. Instead it shall be handed over to

the applicable collection point for the recycling of electrical and electronic equipment. By ensuring this product is disposed of correctly, you will help prevent potential negative consequences for the environment and human health, which could otherwise be caused by inappropriate waste handling of this product. The recycling of materials will help to conserve natural resources. For more detailed information about recycling of this product, please contact your local Civic Office, your household waste disposal service or the shop where you purchased the product.

Page 25

TECHNICAL DATA HPA V100

All Measurements RMS unwtd., 20 Hz - 20 kHz, Pre-Gain set to 0 dB, Highpass active

Inputs: 2 x XLR female, balanced, 2 x Cinch, unbalanced Max. Input Voltage: + 21 dBu, Impedance 10 kOhms Input Impedance: 10 kohms Buffered Outputs: 2 x Cinch unbalanced Nominal Input Sensitivity: +6 dBu Amplifier Overall Gain: +8 dB Overall Gain with PRE-GAIN: -4 / +2 / +8 / +14 / +20 dB Frequency Range: 0 Hz ... 55 kHz (- 0,5 dB) 0 Hz … 200 kHz (-3 dB) Damping Factor: > 400 into a Load of 50 Ohms Dynamic Range: > 128 dB (A-wtd) Noise: < -100 dBu (A-wtd) THD+N (1kHz/2x10V/100R = 1W) < -109 dB / < 0,00035 % THD+N (1kHz/2x4V/32R = 0,5W) < -103 dB / < 0.0007 % Crosstalk: -115 dB (1 kHz) / -93 dB (15 kHz) Headphone Outputs: 2 x ¼“ (6.3 mm) TRS Jack

Max. Output Level: (1kHz / < 0.1% THD+N) 600 28,1 19,6 640

100 25,5 14,5 2100 50 22,6 10,5 2200 32 19,6 7,4 1700 16 13,1 3,5 780

Supply Voltage: 230 V AC / 115 VAC max. 10 VA Case, Front, Back: Aluminium Dimensions: 170 x 49 x 226 mm (W x H x D)

(x 2 )

(dBu)

(V)

(mW)

Page 26

TECHNICAL DATA HPA V100

Page 27

EU CONFORMITY STATEMENT:

We herewith declare that the following unit Name: VIOLECTRIC HPA V100 Serial No. : -all is in conformity with the following EC directives:

2006/95 EG Low voltage directive 2004/108 EG Electromagnetic compatibility EN 60065 Security directives for audio-, JIS C 6065 video- und similar electronic devices

For verification of conformity with regard to electromagnetic compatibility the following harmonized standards are applied:

EN 50081-1 : 1992 Generic emission standard EN 50082-1 : 1992 Generic immunity standard

Product family standard for audio, video, audio-visual entertainment apparatus:

EN 55013 : 2001 EN 61000-3-2 : 2000 EN 55020 : 2002 EN 61000-3-3 : 1995

This declaration is given under responsibility of:

Konstanz 18.03.2013 Fried Reim CEO

LAKE PEOPLE electronic GmbH Turmstrasse 7a D-78467 Konstanz

Fon +49 (0) 7531 73678 Fax +49 (0) 7531 74998

Page 28

WARRENTY

Since 1986 we are constructing and manufacturing sophisticated electronics for ambitious customers. Since the early beginnings we are trying hard by accompanying measures, the use of 1st choice components and multiple quality checks during production to avoid faults at large. We are quiet effective in that and this is – amongst others - why we enjoy such a good reputation. Despite all accurateness faults may occure which may derogate the proper operation of your product.

In this case your unit is protected by a

Needless to say that we will care for your product even after the expiration of the warranty. If it is necessary please dispatch your item to:

Lake People electronic GmbH Fon +49 (0) 7531 73678 Turmstrasse 7a Fax +49 (0) 7531 74998 D-78467 Konstanz E-Mail info@lake-people.de

Your warranty claim begins with the date of purchase, which should be denoted on your proof of purchase. Do not forget to include the receipt of sales or a copy of the receipt. Please also include a short description of the fault(s). For the reshipment we need you correct address !! Care for a safe packaging. Best is to use the original packaging. Please keep in mind that we cannot accept collect freight. We will grant a quick repair and quick return of the unit. In case of a warranty repair we will reship free of charge.

Please denote here the serial number and the date of purchase:

Serial Number Date of Purchase

2-year Warranty !

Violectric HPA V 100, HPA V200 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual