E.A.R. Master Disc
Overview
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The current resurgence of the LP has a new champion! Amid the many new turntables gracing the market, few if any offer
as many novel features as EAR Master Disk. But this is not novelty for the sake of it, and we are proud to announce a new raising of standards.
Most striking perhaps is the all-new ?no contact? drive
system. The need to transfer power to the platter of a turntable has always
been a source of trouble, as any system with the capacity to transfer power
can
by the very same means transfer vibration too. Flexible rubber belts have
proved a fairly satisfactory solution, but suffer problems of slip and
hence
slightly uncertain speed, and they also pull the platter sideways which can
result in stability problems.
Now Tim de Paravicini, the renowned designer of EAR
amplifiers, has come up with an ingenious solution that solves all these
problems. A low-noise motor, controlled by a carefully optimised servo
loop,
drives a sub-platter via a toothed belt. This immediately eliminates slip
and
ensures that speed is absolutely controlled. The sub-platter drives the
main
platter via a clever arrangement of opposing magnets. Again, this cannot
slip,
but it allows just enough compliance to filter out any remaining vibration
from
the motor and belt, whilst applying a fully symmetric driving force.
Bearings are another problem for any turntable designer. We
have solved this by using precision Swiss angular contact bearings which
are at
least as quiet as the more common ?point contact? types but wear much
more
slowly, so that performance after years of use will be as good as on
initial
purchase.
