Dual New Dual Turntables Catalog

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The new Dual turntables.

For the lif e of your records.

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Records: the finest program source for music at home.

Today as always. records are the best source of
music for home listening. For many reasons. Their
dynamic range and frequency response. The
almost limitless choice of program material. Ease
of handling. The instant access to any portion of
the music.

All this. plus the fact that many music lovers
have been building record libraries for more than
half their lives. makes records the most precious
program source in many homes. if you add up your
own total investment in records. you may find that
they are actually the most expensive component"
of your system.

However. records should be handled with great
care if they are to continue sounding good each
time they're played. This means the equipment
they're played on-especially the turntable-
should be of the highest quality. Because the
turntable can make a big difference in the way your
records sound. And how long they last.

Throughout play. theres a running conflict
between the diamond stylus and the soft vinyl
groove. The ever-changing groove contours force
the stylus to change directions-up. down and
sideways-as rapidly as forty thousand times a
second. Any contour the stylus can't follow. it will
simply lop off. And with it go some of the high
notes.

80 for the record we'd like you to know about
Dual turntables-and Dual tonearms in particular.
As you will see. every Dual turntable~from the
least expensive to the most expensive-em-
bodies the same basic design philosophy and
manufacturing quality.

The world's best-designed tonearm.

Every Dual tonearm is mounted in a four-point
gyroscopic gimbal. a design widely acknowledged

as the finest suspension system available. The
tonearm pivots exactly where the vertical and

horizontal axes intersect. and remains perfectly
balanced in all planes of movement. The bearing
friction is extraordinarily low-vertical friction less
than eight milligrams. even in our lowest-priced
model.

The straight-line. tubular design provides
maximum rigidity with minimum mass. (A curved
tonearm may look sexy. but it adds mass.
decreases rigidity and may cause lateral
imbalance-hardly consistent with good
engineering principles.)

Tonearm tracking settings are made in the iden-
tical manner on every Dual. The vernier-adjust-
able counterbalance lets you establish zero ba-
lance with micrometenlike precision. so the track-
ing force can be set easily and with complete
accuracy.

A tempered. flat-wound spring applies tracking
force directly at the vertical pivot. and this force
remains perpendicular to the record even if the
turntable is not absolutely level.

By contrast. tonearms which apply tracking
force by shifting the counterweight forward are
actually unbalanced during play and prone to mis-
tracking. For example. on warped records the
stylus tends to dig in on the uphill side of the warp
and to lose contact on the way down.

Anti-skating is applied around the horizontal
pivot so that it acts as a direct counterforce to the
skating force. (Skating is a force originating in the

geometry of every pivoted tonearm that causes
the stylus to apply more pressure on the inner wall
of the groove than on the outer wall.) Dual's anti-
skating system provides separate calibrations for
all stylus types. and adjusts automatically for the
varying degrees of skating force encountered by
the tonearm as it moves across the record.

The end result: a dynamically-balanced tone-
arm system that establishes and maintains the
correct cartridge-to-groove relationship. The
stylus traces the record groove freely. precisely.
and with the minimum tracking force advisable for
its tip mass and compliance. In short: flawless
tracking for better sound reproduction and longer
record life.

Perspective on drive systems

The importance of the turntable drive system
should be neither minimized nor exaggerated. Its
function is simply to rotate the platter at precisely
the required speed-and with a minimum of vibra-
tion. As Julian Hirsch of Stereo Review put it: It
would make little difference if the platter were
powered by well-disciplined hamsters on a tread-
mill. It is the end result that counts." The reliability
of hamsters being somewhat uncertain. the most
widely accepted systems today are direct and belt.
each having its own special characteristics.

The rotating shaft of the low-speed direct-drive
motor is connected directly to the platter. Such a
motor must have sufficient torque. a speed-
regulating system and freedom from vibration. A
true high performance direct-drive motor is ex-
pensive to make. especially if it is to perform reli-
ably and maintain its specifications over the years