Plinius SA-REFERENCE, Инструкция по эксплуатации

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this facility provides the user with a much cooler operating temperature, and a much
reduced demand on the mains electricity supply, particularly at idle while the amplifier
is not reproducing music. This feature allows you to leave the PLINIUS SA-Reference
switched ON at all times, rendering the amplifier ready for use and requiring only
a few minutes of warm-up in Class A before the very best of the amplifier’s sonic
qualities may be experienced.
CLASS A: This position provides Class A bias to the output stage therefore ensuring
the optimum performance of the amplifier during all listening events.
Class A amplifiers run hotter than Class AB amplifiers, hence our specially designed
and distinctive heat sinks. Operating the amplifier in Class A necessitates two
precautions that should be observed.
1. On switching to Class A, the temperature of the amplifier will quickly increase
and the amplifier will become quite hot. Ensure that you have left adequate
space around the amplifier for ventilation.
2. The power required from the mains supply in Class A is approximately 1,000
watts, similar to a small electric heater. The amplifier should not be connected
to a wall outlet that is shared with other heavy current appliances such as
heaters or electric motors. If in doubt, check with your Plinius dealer for advice.
WHY CLASS A IS BETTER
Class A has always been regarded as the perfect operating mode for audio amplifiers.
Many leading amplifier designers and manufacturers world wide recognise that a well
designed Class A circuit has inherently lower distortion than any other design.
Class A circuit topology is one in which the total current the amplifier is capable of
delivering, is kept flowing in the circuit regardless of demand. In a conventional or Class
AB amplifier circuit this current flow varies when demand varies. Furthermore, as current
varies, the voltage on the power supply rails (as seen by the output stage) varies too.
In a Class A circuit, current draw should be constant therefore there is an absence of
the power supply modulation common in Class AB design amplifiers. Pinpoint images,
tonal clarification, intertransient silence, more readily defined dynamic shadings, inner
detail and authority are all inherent advantages of good Class A design.