Violectric HPA V181 User Manual Download

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CONFORMITY STATEMENT

We herewith declare that the following unit

Name:

VIOLECTRIC HPA V181

Serial No. :

-alle -

is in conformity with the following EC directives:

2006/95 EG

Low voltage directive

2004/108 EG

Electromagnetic compability

EN 60065 : 2002

Security directives for audio-,

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

Summary of Contents for HPA V181

Page 1: ...1 HEADPHONE AMPLIFIER HPA V181 USER s MANUAL ...

Page 2: ...pt 7 Connection Connectors 9 General 10 Operation 11 Things to know 19 Dismantling Jumper Settings 26 Disposal 27 Technical Data 30 Conformity Statement 31 Warranty 32 CAUTION THE HIGH OUTPUT LEVELS ACHIEVABLE WITH THIS UNIT MAY DAMAGE YOUR HEARING OR THE HEADPHONES IF OPERATED CARELESSLY ...

Page 3: ...High End market with its specific requirements 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 ninetie...

Page 4: ...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...

Page 5: ...tion 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 BLA...

Page 6: ...ser 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 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 int...

Page 7: ... 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 28 Technica...

Page 8: ...nclosure 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 ...

Page 9: ...9 Connection Connectors for Analog and Digital Signals ...

Page 10: ...tputs 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 4 amplifiers with BUF634 1 balanced headphone output Neutrik 4 pin gold plated 2 silver plated Neutrik h...

Page 11: ...er is provided via a three pin IEC CEE socket and mating cold appliance mains cord with Schuko type plug The device is set to 115 or 230V mains internally whereas the actual voltage may vary between 190 240 volts 85 120 volts for 115 V operation for flawless operation A toroidal transformer provides the internal stabilized operating voltages of 18V MAINS FUSE The 0 25A time lag fuse is soldered in...

Page 12: ...ockets 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 28 ...

Page 13: ...et 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 or USB 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 page 28 Technical Appendix THE OPTIONAL DIGITAL INPUT Your headphone am...

Page 14: ...d 100 dB THD N Thus representing an upper middleclass solution Please note The digital input has priority over all other inputs and will mute these when a valif digital signal is detected When a USB cable is inserted it may be required to restart running media applications on the host Volume control of the host application should be set to 100 Too loud Too soft The PRE GAIN method The V181 is spec...

Page 15: ...ps of 6dB each For this purpose two switching devices are located on the rear panel for left and right channel individually CAUTION The switch settings should be altered under the following conditions only The unit must be switched OFF the VOLUME control must be set to minimum left and right channel should ALWAYS be set the same never increase the setting by more than ONE step per channel at a tim...

Page 16: ...nd indicators are located on the front panel POWER SWITCH The unit is put into operation by means of the power switch Power on status is indicated by the blue LED below VOLUME CONTROL The VOLUME control sets the desired output volumes for left and right channel simultaneously THE AMPLIFIERS The input signals are fed to a special stereo amplifier which is equipped equipped with 2 power stages per c...

Page 17: ...es also for high impedance headphones THE BALANCED HEADPHONE OUTPUT The HPA V181 offers a balanced headphone output This is equipped with a gold plated female 4 pin XLR connector Balanced Headphone socket pinout Pin 1 Left channel Pin 2 Left channel Pin 3 Right channel Pin 4 Right channel THE UNBALANCED HEADPHONE OUTPUTS The HPA V181 offers two stereophonic headphone outputs each equipped with a 1...

Page 18: ...nical Appendix Left phone jack socket Right phone jack socket TIP left channel TIP right channel RING left channel RING lright channel SLEEVE Ground not necessary SLEEVE Ground not necessary HINTS FOR THE BALANCED OPERATION OF HEADPHONES As there is no common standard about how to make the connectors of balanced headphones and headphone amplifiers we decided to equip our unit s with 4 pin XLR conn...

Page 19: ...ce 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 t...

Page 20: ...V for 100dB sound pressure level With the control fully turned up the V181 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 ...

Page 21: ...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 V181 are configured as outputs the converted USB signal is available there in analog form and can be used to feed further external a...

Page 22: ...he 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 mechanica...

Page 23: ...ific resistances Whilst doing so the ground which should remain calm is polluted by remains of left and right signals This means crosstalk between both channels and it is hearable and measurable In balanced mode the voice coil from the headphone is driven by two amplifiers One is operating the normal signal one the 1800 phase shifted inverted signal what results in a push pull operation Whilst one...

Page 24: ...isplaced 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...

Page 25: ...e compared to normal unbalanced equipment The headphone outputs 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 condit...

Page 26: ...es please follow the instruction below 1 screw off both upper screws on the front panel 2 screw off both upper screws on the back panel 3 unscrew ALL remaining screws on the back panel by 1 10 2 3 mm 4 now lift the upper lid 5 make your personal jumper settings 5 assemble the unit in reverse order Frequency bandwidth limiting Your HPA V181 s upper frequency limit is 200 kHz the so called 3 dB poin...

Page 27: ... to AC response 12Hz 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 electroni...

Page 28: ...28 JUMPER SETTING HPA V181 ...

Page 29: ... HPA V181 situated left and right from the balanced connector are configured to match normal unbalanced jacks ex works see page 17 By means of internal jumpers these sockets may provide balanced operation with two phone jack see page 18 for the right phone jack connection After opening the case the 1 4 sockets may be configured ...

Page 30: ...B Frequency Range 0 Hz 55 kHz 0 5 dB 0 Hz 200 kHz 3 dB Damping Factor 250 into a Load of 50 Ohms Dynamic Range 128 dB A wtd Noise 100 dBu A wtd THD N 1kHz 2x10V 100R 1W 108 dB 0 0004 THD N 1kHz 2x4V 32R 0 5W 109 dB 0 00035 Crosstalk 115 dB 1 kHz 100 dB 15 kHz Headphone Outputs 1 x 4 pin XLR female 2 x 6 3 mm TRS Jack Max Output Level RL x 2 Ua dBu Ua V Pa mW 1kHz 0 1 THD N 600 28 3 20 2 680 100 26...

Page 31: ...fication 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 1...

Page 32: ...iration 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...

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