Micro seiki rx 5000 owners manual

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OPERATING RMNUAL

MICRO

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A. Background information to the development of

the remote drive unit
When we look back over the evolution of turntables during the last
few years, we see that manufacturers have focused on the major
design checkpoints of rated speed maintenance and signal-to-noise
ratio improvement. The development of the direct drive motor and
its adoption in turntables can be virtually called a breakthrough
since the technology resolves the themes posed over the years.
As great improvements in rated speed maintenance and the signal-to-
noise ratio. which form the basic requirements of rotating mecha-
nisms, were forged, turntables moved into the mass production and
mass consumption age. and along with the introduction of the
quartz lock system and other electronic control circuits, turntables
were thought to be virtually perfect from both a mechanical and
electrical standpoint.
The basic function of a turntable is to play discs. What happens is
that the disc is stationary and no signals at all are generated but by
rotating the disc at the prescribed speed. a wave motion can be
perceived from the speakers through the reproduction system.
We have seen that the sound which is reproduced by the speakers
undergoes changes with the rotational energy of the platter, and it
has recognized that there are limits to improving the sound quality
simply by rotating the disc at the prescribed speed. What we mean
here by rotational energy is not simply the value of the torque
based on the motor itself but the effect of the moment of inertia
which is produced by the diameter of the platter and its mass
distribution. In other words. our experience is that clean repro-
duced sound should be provided with clean (natural) energy which
is produced by the speed and the mass of the actual rotating body.

In its research we spotlighted the strength precision of the fulcrum,
which is of fundamental importance for rotating mechanisms, and
it has spent a great deal of time and effort in improving the shaft
so that it sufficiently supports the rotation of the platter. In this
way, we came to realize that the construction and strength precision
of the shaft have a great effect on the reproduced sound, just like
the platter' s moment of inertia. However, there are limits to clarify-
ing the fulcrum with today 5 DD motor turntables because of the
construction involved, and this obliged us to develop its own shaft.
We can say quite clearly that, against the backdrop of string drive
turntable design, it was only inevitable that we should take another
look at these rotating mechanisms. Despite the fact that for the last
ten years electronics technology has been introduced at a very rapid
clip. there is still great support for string drive and other similar
drive systems, and there are a number of audio-philes and groups
which use effective techniques by experience to improve the sound
quality to their own liking. Although the debate between the
vacuum tube and the transistor appears to have been brought to a
close, we cannot ignore the fact that in the world of rotating
mechanisms the absolute requirements imposed by mechanical
strength precision and mass cannot be replaced on equivalent terms
simply by electronics. We can say that the capacity of the human
ear to appraise sound quality gose beyond the limits detected by
test and measuring instruments. Even with therange of the wave
motion produced by the speakers, we must now stand behind the
belief that there is no need to stick to "audio common sense" which
dictated that it is possible to discriminate all the way between part
of the mechanisms of the turntable, which is the entrance to the
sound.