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HEADPHONE AMPLIFIER

HPA V 100

USER´s MANUAL

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Summary of Contents for HPA V 100

Page 1: ...1 HEADPHONE AMPLIFIER HPA V 100 USER s MANUAL ...

Page 2: ... 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 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 26 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: ...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: ...de 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 al...

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: ...xceed 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 page 26 Technic...

Page 14: ...C The headphone amp 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 headphone amp whereas audio formats 24 bit with 44 1 48 or 96 kHz are supported All digital modules are offering a DA converter offering 110 dB dynamic range and 100 dB THD N Thus representing an upper middleclass solution Please note The d...

Page 15: ...age while the maximum setting may still be too soft for low efficiency headphones but all users expect highest quality at lowest noise and distortion Thus the circuitry must adapt itself as the headphone won t WE CALL THE SOLUTION TO THIS PROBLEM PRE GAIN The alignment between amplifier and headphone is provided by the preamp stage which can boost or attenuate the input signal in four steps of 6dB...

Page 16: ...d direction If you find your HPA V100 should provide more gain do so with the switch labelled 6 dB double gain or 12 dB quadruple gain Ex factory all switches are set to their lowest position i e 0 dB or unity gain which should be sufficient for most applications OPERATION Most control elements and indicators are located on the front panel POWER SWITCH The unit is put into operation by means of th...

Page 17: ...ver 200kHz 3dB cut off frequency in order to obtain absolutely linear characteristics within the audible range Overall gain is set to 8 dB in order to provide sufficient reserves also for high impedance headphones THE HEADPHONE OUTPUTS The HPA V100 offers two stereophonic headphone outputs each equipped with a 1 4 6 3mm jack socket Headphone socket pin out TIP Left channel RING Right channel SLEEV...

Page 18: ...n of possible radio frequency interference Towards the low end your HPA V100 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 V100 off...

Page 19: ...ferential 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 p...

Page 20: ...B 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 mea...

Page 21: ...s 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 m...

Page 22: ... individual sections are highly desirable for sophisticated applications and high quality is inevitable to ensure trouble free 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 ampli...

Page 23: ...ltages 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 dampin...

Page 24: ...sal 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 produc...

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 115 dB 1 kHz 93 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 28 1 19 6 640 100 25 5 14 5 2100 5...

Page 26: ...26 TECHNICAL DATA HPA V100 ...

Page 27: ...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 Konsta...

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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