Micro Seiki
DD-31
Direct Drive
Electro Auto Lift/Stop Complete Stereo Turntable with Rose, Ebony or Black
Wooden Base and Dust Cover
Direct Drive
DC Servo Motor
Micro Seiki DD-31 turntables utilize a direct-driven DC servo-controlled drive
motor. The advantages of this type of motor/transmissionless system are extreme
speed stability and increassed torque.
Unaffected by temperature changes and voltage fluctuations, the
resultant wow and flutter components are less than 0,03% WRMS and the
signal-to-noise ratio greater than 63 dB JIS (75 dB DIN-B).
Low-Mass
Straight Tonearm with Dual Radial Bearings
A special
aluminum alloy is used to give the arm its formidable strength and
exceptionally low mass. Both qualities are needed to take full advantage of
today's supercompliant cartridges. The straight-line geometry assures the most
accurate tracking angles as well as contributing to the arm's low mass. A
pair of precision radial bearings give
the arm a lateral sensitivity of only 10 milligrams.
Even the
normally-overlooked signal connectors are of the constant-wipe type, insuring
contact maintenance at all times.
Headshell
Thanks to
the use of carbon fibres, the headshell is as light and rigid as the arm
itself. It joins the arm with a semi-integrated plug-in system that utilizes
thick gold-plated wiping-type contacts. Oxygen-free copper leads are used to
exclude electromagnetic influences (eddy-current lossles) resulting in
exceptional transmission characteristics (improved S/N ratio)
Skating
Force Cancellation
Anti-skating
is provided by a precision calibrated adjustment to axactly match vertical
tracking force.
Oil Damped
Cueing
Feather-light
contact between stylus and record groove is provided by the oil-damped cueing
system. It is silent, smooth and, at the end of a record, completely automatic.
Genuine Wood
Base
One of the
best acoustical dampening materials known is wood. It is used as the base
material for all Micro Seiki turntables and is available in both natural
rosewood and ebony finishes.
Special feet
All Micro
Seiki turntable systems are equipped with specially-developed anti-feedback
feet. The chart below shows a comparison between the isolation provided by
conventional rubber feet and the Micro Seiki feet. As it apparent, sub-sonic
resonance is greatly reduced by the Micro Seiki design.
Specification
DD-31
Motor
Drive
System: Direct-Drive DC Servo Motor
Speed: 33-1/3 and 45 rpm
Fine Speed
Adjustment range: ±6%
Turntable
Platter: Die-cast aluminum; 4 Strobo
stripes
Diameter
: 310 mm (12-1/4")
Weight
: 1,2 kg (2,6 lbs)
Wow and
Flutter: less than 0,03%
Signal-to-Noise
Ratio: More than 63 dB (JIS); 75 dB (DIN-B)
Tonearm
Type: Low static mass straight type
Lateral
Sensitivity: 10 mg by Dual precision
Miniature Ball Bearing
Head
Shell: H707X, Light weight, mixing
Carbon Fibres, Gold plated 4-pin plug-in connector
Effective
length: 237 mm (9-3/8")
Overhabg: 15 mm
Maximum
Tracking Error: less than 1,5
Range of
Tracking Force Adjustment: 0 -3 g
Power
Supply: 100 - 120 V, 220 - 240 V 50/60 Hz
Dimensions
(W x D x H): 468 x 375 x 155 mm
(18-3/8" x 14-3/4" x 6-1/8")
Cartidge GAS
2-MF (Optional)
Type: Moving Flux High Compliance Type
Frequency
Response: 10 - 25,000 Hz ±2 dB
Output
Voltage: 3,2 mV (1 kHz)
Channel
balance: less than 1,0 dB (1 kHz)
Channel
Separation: more than 25 dB (1 kHz)
Dc
resistance: 800 Ω
Impedance:
3 k Ω (1 kHz)
Compliance:
Dynamic
: 10 x 10¯⁶ cm/dyne
Static
: 25 x 10¯⁶ cm/dyne
Suitable
Tracking Force: 1,3 ±0,3 g
Weight: 5,4 g
Stylus
Tip: 0,3 x 0,7 mill Elliptical
Finally someone writes the correct s/n standard reference. Microseiki always used JIS standard without indicating it, so many peaple today (like I did) may think they were speaking about DIN B s/n and MS turntable are not so damped and quiet.
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