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Table of Contents
Related Manuals for Violectric HPA V550 PRO
Summary of Contents for Violectric HPA V550 PRO
- Page 1 HEADPHONE AMPLIFIER Violectric HPA V550 / V550 PRO USER´s MANUAL...
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Page 3: Table Of Contents
Content Theme Page About Safety Instructions The Earth / Grounding Concept Connection / Connectors General Remote Control Block Circuitry Power Inputs, Controls About PRE-GAIN Outputs / Output Management Reset Software Things to know Disposal Technical Data Dismantling Jumper Settings Conformity Statement Warranty CAUTION!! THE HIGH OUTPUT LEVELS ACHIEVABLE... -
Page 4: About
Any technical questions or need for advice is welcome. is a subsidiary of www.lake-people.de LAKE PEOPLE electronic GmbH www.lake-people.com Turmstrasse 7a www.NIIMBUS-audio.de D-78467 Konstanz www.NIIMBUS-audio.com www.violectric.de Fon +49 (0) 7531 73678 www.violectric.com Fax +49 (0) 7531 74998... -
Page 5: 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: The Earth / Grounding Concept
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 OPENING!! AVANT D´OUVRIER... - Page 7 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.
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Page 8: Connection / Connectors
Connection / Connectors for Analogue Signals... -
Page 9: General
Motorized volume control, reed relay attenuator with 256 steps of 0,4 dB each With its dimensions, the VIOLECTRIC HPA V550 ensures optimum flexibility combined with high output power. During design, high emphasis was put on operational safety even when the unit is... - Page 10 THE CASE of VIOLECTRIC HPA V550 is made of 3 + 4 mm Aluminum and a thick 8 mm aluminum front panel. This choice of material ensures high mechanical stability and resistance whilst maintaining a high optical and haptic quality.
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Page 11: Remote Control
THE REMOTE CONTROL FOR VIOLECTRIC HPA V550 Function This remote control sends out infrared rays. For that purpose, there is an infrared LED on the front. The remote control should point in direction of the target device to obtain best functionality. -
Page 12: Block Circuitry
Block circuitry VIOLECTRIC HPA V550... -
Page 13: Power Inputs, Controls
THE POWER-SWITCH The unit is put into operation by means of the power switch. The power-on procedure takes about 5 seconds. During this time the “PROTECT” LED lights red until all internal parameter are checked and found OK. Any breakdown will cause the “PROTECT” LED to come up and the outputs are muted. - Page 14 Please see page 15 to learn more about: “Too loud? Too soft? The PRE-GAIN method” SELECTING / ACTIVATING AN INPUT With the “ANALOGUE INPUTS“ button on the front of VIOLECTRIC HPA V550 one of three analogue inputs may be activated. The corresponding LED is illuminated.
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Page 15: About Pre-Gain
As an option (HPA V550 PRO), the attenuation is made in 256 steps of 0.4 dB each. The steps are switched with special “reed relays”. Here, the switching contacts are situated in a tiny glass tube filled with a protective gas. The contacts are actuated by a magnetic field. - Page 16 HOW TO OPTIMIZE THE PRE-GAIN SETTING Connect your source to VIOLECTRIC HPA V550 and plug in your headphones. Listen !! Your amp is adjusted best by the individual PRE-GAIN setting when the volume control for “normal” listening is positioned around 12 o´clock.
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Page 17: Outputs / Output Management
The input signals are fed to an amplifier stage especially designed for this application, with 2 x eight transistors per channel. Because of the true balanced operation VIOLECTRIC HPA V550 houses no less than four of those! All in all, 32 of over 50 transistors of the unit are responsible to process analogue signals. - Page 18 THE BALANCED HEADPHONE OUTPUT Balanced Headphone VIOLECTRIC HPA V550 Socket Pin-Out: offers a dedicated headphone output Pin 1 (+) Left channel to connect balanced headphones. Pin 2 (-) Left channel The output is situated on the front Pin 3 (+) Right channel...
- Page 19 If you like to operate you VIOLECTRIC HPA V550 as pre-amp device of outstanding quality to drive some active speakers or power amps, then “POST-FADER” or “VARIABLE OUT” is the weapon of choice.
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Page 20: Reset
To ensure error-free operation and not to harm your valuable headphones in a comprehensive way your VIOLECTRIC HPA V550 is equipped with a number of protective circuits: During powering on there is a five seconds delay to protect your headphones from possibly unwholesome noises. -
Page 21: Software
It gives direct access to all front panel controls except the balance control and the power switch. Alternative Mode: Other remote control codes may be activated for a combined operation with additional Violectric gear. Pushing long (approx. 2 seconds) the “ANALOGUE INPUTS" button the “Remote Control Menu” is entered, the "XLR" LED flashes. - Page 22 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 signal (180 phase shifted). The "hot" wire carries the original signal (a), the "cold" wire carries the inverted signal (-a). In the receiving device, the...
- Page 23 (although not useful…). The potentiometer has nothing to do with the analogue signals from HPA V550 PRO but generates a control voltage which is transferred into the digital domain by an analogue-to-digital converter and fed to a micro controller which generates the digital word to control a 256 step relay attenuator.
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Page 24: Disposal
Why are high supply voltages essential? A headphone doesn't really require high power, but from the equation P = U / 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 to achieve high listening levels. -
Page 25: Technical Data
TECHNICAL DATA VIOLECTRIC HPA V550 All measurements RMS unwtd., 20 Hz - 20 kHz, Pre-Gain set to 0 dB Input Parameter Analogue Inputs (stereo, analogue): 1 x XLR female, balanced, 2 x RCA, unbalanced Max. Input Level: + 21 dBu... -
Page 26: Dismantling
Dismantling / Jumper Settings Please note: In the following, the internal settings of the HPA V550 are discussed. For changing these, a TORX T10 screwdriver or Philips #1 is required and you should by all means PULL THE MAINS PLUG !!! Only thereafter the settings can be altered without any hazard. -
Page 28: Conformity Statement
EC CONFORMITY STATEMENT We herewith declare that the following unit Name: VIOLECTRIC HPA V550 / HPA V550 PRO Serial No.: -all - is in conformity with the GENERAL GROUND-LIFT JUMPER (see page 6/7) following EC directives: 2014/35/EU Low voltage directive... -
Page 29: 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 quite effective in that and this is –...
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