Violectric HPA V200 User Manual Download

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Content

Theme

Page

About Violectric

Safety Instructions

The Earth / Grounding Concept

Connection / Connectors

General

Operation

Special Functions

Things to know

Technical Data

Jumper Setting

Conformity Statement

Warranty

CAUTION !!

THE HIGH OUTPUT LEVELS ACHIEVABLE

WITH THIS UNIT MAY

DAMAGE YOUR HEARING OR THE HEADPHONES

IF OPERATED CARELESSLY !!

Summary of Contents for HPA V200

Page 1: ...1 HEADPHONE AMPLIFIER HPA V200 USER s MANUAL ...

Page 2: ...cept 7 Connection Connectors 9 General 10 Operation 11 Special Functions 18 Things to know 19 Technical Data 25 Jumper Setting 26 Conformity Statement 27 Warranty 28 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: ...potential through the RC filter The LIFT position may be helpful in case of hum or jitter caused by different ground earth potentials VIOLECTRIC HPA V100 200 GROUND CONCEPT BLOCK CIRCUIT G round G round L ift L ift C ase C ase 100n 100n 1 2 3 1 2 3 XLR female XLR female Ground Lift Jumper Ground Lift Jumper GND Earth PE to Case Lift 100n 10k Toroidal Transformer 230 115 V AC POWER SUPPLY U 18 30 V...

Page 8: ...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...

Page 9: ...nding socket of the case ANALOG SIGNALS ANALOG SIGNALS SOURCE 1 2 3 HOT GND SHIELD X Unbalanced Cable Signal to Transformer Balanced Input BALANCED INCOMING SIGNAL XLR MALE PLUG 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 socke...

Page 10: ...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 8 transistors per channel 2 silver plated Neutrik headphone outputs Relay based headphone output cutoff Toroidal transformer Large filtering capacitors in the power supply Switchable ground lift Rugge...

Page 11: ...ix 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 boar...

Page 12: ...l 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 equippe...

Page 13: ...ut 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 THE USB INPUT The USB type B inputs on the V200 can be used to connect a host computer desktop or laptop PC The V200 will be automatically detected as an audio device The USB input is 1 1 and 2 0 compatible Audio files stored on the host can be sent to the V200 whereas a...

Page 14: ...nes however can present load impedances from 8 to 2000 ohms and efficiency ratios from 85 to 115dB per milliwatt Thus it can be quite tricky to fulfil all demands since owners of high effectivity headphones will rarely set the volume control higher than 9 o clock in order to exclude hearing damage while the maximum setting may still be too soft for low efficiency headphones but all users expect hi...

Page 15: ...ntrol 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 time If you find your HPA V200 s volume could be somewhat softer in order to improve volume control range e g push the switch labelled 6dB half gain or 12dB quarter gain in upward direction If you find your HPA V200 should provide more gain do so with ...

Page 16: ...aneously THE AMPLIFIERS The input signals are fed to a stereo amplifier equipped with eight transistors per channel which has been designed for this application exclusively The individual channel design provides optimum crosstalk rejection The amplifier s frequency range stretches from DC to over 200kHz 3dB cutoff frequency in order to obtain absolutely linear characteristics within the audible ra...

Page 17: ...offers two stereophonic headphone outputs each equipped with a 1 4 6 3mm jack socket Headphone socket pinout TIP Left channel RING Right channel SLEEVE GND On power up and power down the outputs are cut from the amplifier circuitry by relay ...

Page 18: ...n of possible radio frequency interference Towards the low end your HPA V200 s frequency response is not restricted at all This means that even extremely low frequencies right down to DC will be amplified DC coupling as this technique is called is not necessarily useful since neither DC nor very low frequencies are audible but may damage your headphones on the other hand Therefore the HPA V200 off...

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: ...for 100dB sound pressure level With the control fully turned up the V200 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...

Page 21: ...rall analog performance of the HPA V200 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 V200 are configured as...

Page 22: ... 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...

Page 23: ...cific requirements of headphones This doesn t 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 ...

Page 24: ...ts 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 lives on fast transie...

Page 25: ... 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 110 dB 1 kHz 95 dB 15 kHz Headphone Outputs 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 27 6 18 5 570 100 25 6 14 8 2200 5...

Page 26: ...page 8 CINCH INPUT OUTPUT JUMPER under the USB PCB see page 12 13 LIFT POSITION CHASSIS POSITION LIFT POSITION OUTPUT POSITION GROUND POSITION ex works GROUND POSITION ex works INPUT POSITION ex works LO CUT JUMPER See 18 AC POSITION 12 Hz ex works DC POSITION 0 Hz VOLUME PCB USB PCB ...

Page 27: ...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 0...

Page 28: ...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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