Direct
Drive; The Idea That Revolutionized the Turntable
When
Technics first introduced the direct drive turntable back in 1969, we were sure
that our new drive design would revolutionize turntable manufacre. Subsequent
history has shown that we were correct. The direct drive system was so much of
an improvement oer the old way that it just couldn't be ignored, and the rest
of the audio world was quick to imitate us. Today the direct drive turntable
has become the industry standard, and it's no wonder. Just take a look at the
direct drive advantages.
Greater
Simplicity
In the
Technics integral rotor-platterstructure direct drive system, the platter
serves as the rotor and the motor housing serves as the stator. Thus, the
plater is the only moving part. No pulleys, no belts, and no idlers are needed
to drive the platter. Construction is greatly simplified and overall precision
is much greater. And with fewer parts to wear out, reliability and service life
is vastly improved.
Greater
Efficiency
The direct
drive motor runs at an ultra-slow speed since it need rotate no faster than the
platter. This reduces mechanical wear and stress, causes less evaporation. The
brushless DC motor has a power consumption 90% lower than conventional motors.
This means much less trouble causing heat and lengthened service life of all
parts. And the elimination of the Ac motor means the elimination of hum and
power line frequency variations as a source of speed inaccuracy.
Higher
Performance
The real
payoff is in performance. The simple construction of the direct drive system
enables much more precise construction and easier quality control. This has
permitted the reduction of wow and flutter to spectacularly low levels and the
total elimination of rumble as a source of interference. As you can, see it is
no exaggeration to say that the technics direct drive turntable has
revolutionized the world of turntables.
Double
Isolated Suspension System
As they
have done in so many oyher areas of turntable design, Technics engineers have
come up with an ingenious and unique method of coping with the acoustic
feedback problem; the floating double isolator. External sounds and vibrations
that reach the turntable either through the air or throught the unit's resting
position - are met by two separate isolation systems. The first isolators
effectively dampen harmful external vibrations which may reach the unit through
the surface that it rsts on. The all important turntable, motor and tonearm
assembly are then supported on a main base which floats on the secondary
isolation system. These isolators are specially designed with material and
springs of calculated and finely tuned elasticity to absorb external
vibrations. The result is an audible clearity and transparency in sound.
Gimbal
Suspension Tonearm
For the
finst tracing senstivity, Technics tonearms rest in a gimbal suspension
equipped with two pairs of low friction pivot bearings. With this enhanced
rotational sensitivity, the tonearm is allowed free, gyroscopic movement to
ensure flawless tracking.
One Chip
IC Control
Most
Technics direct drive turntables incorporate sophisticated one chip interated
circuits to govern all motor control funtions. This One Chip IC is one of teh
secrets behind the spectacular performance achieved by Technics DD unit. The
B.FG principle (Back-Electromotive-Force Frequency Generator) causes a near
instantaneous current change to correct for even the slightest speed deviation,
assuring highly stable rotation.
Quartz Phase-Locked Servo Control
The quartz oscillator, the most accurate method known for electronic frequency control, is used in Technics professional grade turntables to provide the basic reference frequency for all motor movements and for the stroboscope. This allows the achievement of the fantastically low speed drift figure of ±0,002%, or a maximum of ±0,036 second error over the 30 minute playing time of a typical LP side.
High
Starting and Running Torque
Due to exceptionally high motor torque (6 kg-cm), speed built-up is an
amazing 0,25 second. Normal operating speed (33⅓ rpm) is reached
after only a 25 degree turn of the platter.
Anti-Skating
Device
For
perfect tracking, a fine-scale anti-skating device permits adjustment to fit
all stylus pressures.
Independent
Variable Pitch Controls
To allow
adjustment of the rotatiopnal speed, independent pitch controls are built-in.
Illuminated
Stroboscope
permits
monitoring of exact platter speed
Universal
Headshell
For
convenient replacement of cartridge, a removable universal headshell fits
easily onthe end of the tonearm.
Viscous-Damped
Cueing
This
feature is provided even on automatic units to allow safe manual lowering of
the tonearm onto the record.
Detachable
Dust Cover and Sleek, Elegant Design
Technics Direct Drive Turntables:
Technics SL-2000
Technics SL-1800
Technics SL-1700
Technics SL-1600
Technics SL-1100
Technics SP-10 MkII
Technics Direct Drive Turntables:
Technics SL-2000
Technics SL-1800
Technics SL-1700
Technics SL-1600
Technics SL-1100
Technics SP-10 MkII
Nessun commento:
Posta un commento