Violectric HPA V281, Руководство пользователя

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With its small dimensions, the HPA V281 ensures optimum flexibility
combined with high output power. During design, high emphasis was
put on operational safety even when the unit is operated inappropriately.
The HPA V281 is equipped with internal filters to prevent damage to the
connected headphones due to high-frequency overload beyond the
audible range.
THE CASE
The HPA V281'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 V281's case is grounded. Internal reference ground is set to
“LIFT” position ex works but may be reconfigured to “GROUND” position
if required. ( see also: page 7 "Earth/Ground concept", page 32
"Technical Appendix" ).
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.
The device is set to 230V mains, whereas the actual voltage may vary
between 190 and 240 volts for flawless operation.
The mains voltage may be altered to 115 V AC supply inside the unit
with the aid of a mains voltage selector. In this case stable operation is
granted in a range of 85 to 120 V (see page 32).
Two toroidal transformers with 15 and 25 Watt are providing the internal
operating voltages of +/-30 V. Out of these voltages some more
operating voltages are generated.