Violectric HPA V90 Manuale Utente

1 HEADPHONE AMPLIFIER HPA V90 USER´s MANUAL

10THE CASE The HPA V90's case as well as the front/rear panels are made of solid aluminium. This choice of material ensures high mechanical stab

11 THE INPUTS For the use with unbalanced signals, gold plated cinch sockets are provided. They are labelled as "LEFT IN" and "RIGHT

12 … owners of high-effectivity headphones will rarely set the volume control higher than 9 o'clock in order to exclude hearing damage, while .

13If volume could be somewhat softer (in order to improve volume control range e.g.), push the switch labelled "-6dB" (half gain) or "

14 VOLUME CONTROL The "VOLUME" control sets the desired output volumes for left and right channel simultaneously. THE AMPLIFIERS The inp

15 Special functions Please note: In the following, the internal settings of the HPA V90 are discussed. For changing these, a TORX T10 screwdriver

16Things to know … The HPA V90 offers unbalanced inputs. The input signals are fed to buffer amplifiers - for left and right channel separately - wh

17Why does PRE-GAIN make sense ? Two extreme examples (with the HPA V90 at 8dB gain, volume control set to full): 1st example: The (pre-)amplifier p

18In order to transmit these frequencies at optimum quality, the frequency response of an amplifier should be as wide and as "flat" as pos

19Extremes in this sense are the AKG K1000 with 74dB/mW on the one hand, and the Sennheiser HD25 with108 dB/mW on the other hand: The K1000 requires

2 Content Theme Page About Violectric 3 Safety Instructions 5 The Earth / Grounding Concept 7 Connection / Connectors 9 General 10 Operation 11

20DISPOSAL Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collec

21TECHNICAL DATA HPA V90 All Measurements RMS unwtd., 20 Hz - 20 kHz, Pre-Gain set to 0 dB, Highpass active Inputs: 2 x Cinch, unbalanced Max. Inpu

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23EU CONFORMITY STATEMENT: We herewith declare that the following unit Name: VIOLECTRIC HPA V90 Serial No. : -all - is in conformity with th

24WARRENTY Since 1986 we are constructing and manufacturing sophisticated electronics for ambitious customers. Since the early beginnings we are try

3Cordial thanks for your decision in favour of a product ! is a trademark and product line of Lake People electronic GmbH. Lake People electronic

4How do devices get to the customer ? devices can be obtained from respective specialist suppliers. If there is none such accessible regionally, t

5General Safety Instructions WARNING For your protection, please read the following: Water, Liquids, Moisture: This appliance should not be used

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 probl

7 The Earth / Grounding Concept General GROUND-LIFT Jumper (accessible from the inside. Mind the SECURITY INSTRUCTIONS !! ): Ex-works this jumper

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

9GENERAL INFORMATION The HPA V90 is a stereophonic headphone amplifier designed to drive low-, medium- and high-Z loads (16...600 ohms) as usually re