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Summary of Contents for Violectric DHA V3802
- Page 1 HEADPHONE AMPLIFIER with D/A Converter Violectric DHA V380 USER´s MANUAL Manual DHA V380 July 2021 F. Reim P. 1...
- Page 2 P. 2 Manual DHA V380 July 2021 F. Reim...
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Page 3: Table Of Contents
Content Theme Page About Safety Instructions The Earth / Grounding Concept Connection / Connectors General Block Circuitry Operation About PRE-GAIN Outputs Error Reporting Technical Data Disposal Dismantling Jumper Settings Conformity Statement Warranty CAUTION !! THE HIGH OUTPUT LEVELS ACHIEVABLE WITH THIS UNIT MAY DAMAGE YOUR HEARING OR THE HEADPHONES IF OPERATED CARELESSLY !! Manual DHA V380... - Page 4 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 P. 4 Manual DHA V380 July 2021 F. Reim...
- Page 5 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.
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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
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. - Page 8 Connection / Connectors for Analogue and Digital Signals P. 8 Manual DHA V380 July 2021 F. Reim...
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Page 9: General Information
Rugged Aluminum case, black anodized 6 mm massive Aluminum front panel With its dimensions, the VIOLECTRIC DHA V380 ensures optimum flexibility combined with high output power. During design, high emphasis was put on operational safety even when the unit is operated inappropriately. -
Page 10: The Power-Switch
This choice of material ensures high mechanical stability and resistance whilst maintaining a high optical and haptic quality. GROUND AND PROTECTIVE EARTH The case of VIOLECTRIC DHA V380 is connected to protective earth. POWER SUPPLY Mains power is provided via a three-pin IEC/CEE socket and mating "cold-appliance" mains cord with Schuko-type plug for units purchased in middle Europe. -
Page 11: Block Circuitry
Block circuitry VIOLECTRIC DHA V380 Manual DHA V380 July 2021 F. Reim P. 11... - Page 12 PRE-GAIN method” SELECTING / ACTIVATING AN INPUT With the “ANALOGUE INPUT“ and “DIGITAL INPUT“ buttons on the front of VIOLECTRIC DHA V380 one of two analogue inputs or one of three digital inputs may be activated. he corresponding LED is illuminated.
- Page 13 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 DHA V380 houses no less than four of those! All in all, 32 of nearly 50 transistors of the unit are responsible to process analogue signals.
- Page 14 -18 / -12 / -6 / 0 / +6 / +12 / +18 dBr. For this purpose, two switching devices are located on the rear panel for left and right channel individually. HOW TO OPTIMIZE THE PRE-GAIN SETTING: Connect your source to VIOLECTRIC DHA V380 and plug in your headphone. Listen !!
- Page 15 Moving the "OUTPUT" switch to the middle position will deactivate all outputs (mute). The red LED shows this state. THE BALANCED HEADPHONE OUTPUT CONNECTORS VIOLECTRIC DHA V380 offers two dedicated headphone outputs to connect balanced headphones. The outputs are situated on the front panel and come as a gold plated 4-pin XLR socket and a 4.4...
- Page 16 Here, the input signal is routed directly to the line outputs without any alteration from the volume attenuator. If you like to operate you VIOLECTRIC DHA V380 as pre- amp device of outstanding quality to drive some active speakers or power amps, then “POST-FADER”...
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Page 17: Signal Processing
SIGNAL PROCESSING inside your VIOLECTRIC DHA V380 is always unbalanced. This is no disadvantage as the so called “fully balanced” signal processing often generates more issues that solving them. It is not possible to preserve a reasonable symmetrical integrity of a signal inside a complex... - Page 18 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 balanced signal is...
- Page 19 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.
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Page 20: Technical Data
TECHNICAL DATA VIOLECTRIC DHA V380 All measurements RMS unwtd., 20 Hz - 20 kHz, Pre-Gain set to 0 dB Input Parameter Analogue Inputs (stereo, analogue): 2 x RCA, unbalanced Max. Input Level: + 21 dBu Input Impedance: 10 kohm Input Parameter Digital... -
Page 21: Disposal
DISPOSAL Disposal of Old Electrical & Electronic Equipment - WEEE Regulation (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. - Page 22 P. 22 Manual DHA V380 July 2021 F. Reim...
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Page 23: Conformity Statement
EC CONFORMITY STATEMENT We herewith declare that the following unit Name: VIOLECTRIC DHA V380 Serial No.: -all - is in conformity with the following EC directives: 2014/35/EU Low voltage directive 20014/30/EU EMC directive EN 60065:2014/AC:2016 Security directives for audio-, JIS C6065:2016... -
Page 24: 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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