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Table of Contents
Related Manuals for Violectric HPA V 100
Summary of Contents for Violectric HPA V 100
- Page 1 HEADPHONE AMPLIFIER HPA V 100 USER´s MANUAL...
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Page 2: Table Of Contents
Content Theme Page About Violectric Safety Instructions The Earth / Grounding Concept Connection / Connectors General Operation Special Functions Things to know Disposal Technical Data Jumper Setting Conformity Statement Warranty CAUTION !! THE HIGH OUTPUT LEVELS ACHIEVABLE WITH THIS UNIT MAY... -
Page 3: About Violectric
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. - Page 4 '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...
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Page 5: Safety Instructions
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. - 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.
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Page 7: The Earth / Grounding Concept
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 (<... - 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.
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Page 9: Connection / Connectors
Connection / Connectors for Analog Signals ANALOG SIGNALS Balanced Cable (Signal) to (Transformer) Balanced Input XLR MALE PLUG Shield = Signal Ground = Pin 1 Hot / + Phase = Pin 2 Cold / - Phase = Pin 3 The case of the connector should not be wired COLD to the shield of the cable. -
Page 10: General
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. -
Page 11: Operation
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. -
Page 12: Unbalanced Inputs
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. - 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.
- Page 14 THE OPTIONAL DIGITAL INPUT Your headphone amp may be equipped with an optional DA converter with one out of 3 different digital inputs. The COAX input is made for digital PCM audio data coded as S/P-DIF with a sample rate between 28 … 108 kHz. The OPTO input is made according to the TOS-Link standard and is waiting for digital PCM audio data with a sample rate between 28 …...
- Page 15 Too loud ? Too soft ? The PRE-GAIN method The V100 is specially designed to drive headphones. Headphones 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...
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Page 16: Power Switch
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 time. If you find your HPA V100's volume could be somewhat softer (in order to improve volume control range e.g.), push the switch labelled "-6dB"... - Page 17 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 cut-off frequency) in order to obtain absolutely linear characteristics within the audible range.
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Page 18: Special Functions
Special functions Please note: In the following, the internal settings of the HPA V100 are discussed. For changing these, a TORX T10 screwdriver is required and you should by all means PULL THE MAINS PLUG !!! Only thereafter the settings can be altered without any hazard. Frequency bandwidth limiting Your HPA V100's upper frequency limit is 200 kHz - the so-called "3-dB point"... -
Page 19: Things To Know
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). - 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):...
- 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+.
- 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.
- 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.
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Page 24: Disposal
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. -
Page 25: Technical Data
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... -
Page 26: Jumper Setting
TECHNICAL DATA HPA V100... -
Page 27: Conformity Statement
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-,... -
Page 28: Warranty
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 –...
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