|650,000yen(around the 1983 time)
The stereo player system which aimed at the more
nearly high-definition play by adding and adding a modification to an arm or a
detail based on Exclusive P3.
The scheme which controls DD motor of the
linear torque scheme of a slotless and a coreless structure by Quartz PLL is
adopted as a phone motor and a bearing structure. Furthermore, by the
conventional measuring method, the impossible rotation performance of 0.001% of
less than rotation unevenness 0.003% and a rotational frequency precision is
realized by adopting the bearing structure of a SHR (Stable hanging rotor)
scheme where the centroid of the axis-of-revolution part was set up low.
SHR scheme is what designed the bearing structure to the inverted structure of
the conventional scheme, an inertia arises in a bearing part during a rotation, and side pressure has stopped applying to an axis probably by having brought the
supporting point close to a centroid and having changed the conventional bearing
part into the rotation side as for it. And for the preventing with ガタ, the path
clearance of bearing occurs for a minimum and the inertia of a turntable is set
to sufficient torque also to the load intensity of the cartridge added to the
perimeter of a turntable.
The high torque motor of the dual rotor
structure using an anisotropy ferrite magnet with a strong attraction of magnet
has realized about the same high torque (10 kg-cm) as a record cutting unit.
Furthermore, adoption and the interval of the servo circuitry which was
excellent in the turntable of inertial-mass 700 kg-cm2 or the
transient realized the outstanding startup property (it is a
constant-speed rotation in 0.3 second after switchpoint-on) and load
characteristics-proof (it is 1.5kg by stylus-force conversion), and have acquired the rotation property that the stable precision is high.
In addition to the weight saving of a tone arm, the mass concentration scheme and oil dumping adjustment mechanism which concentrated the mass on the axis of revolution are carried in the tone arm part.
braking by reliable silicon oil on an arm axis, the reduction of massive [
low-pass ] and cross modulation distortion is realized. Moreover, it is also
possible to be able to control the amount of braking of oil dumping according to
the property of a cartridge, and to turn OFF dumping.
The tone arm made
from a DRA& alumina ceramics which investigated absent-resonance-ization is
adopted as a tone arm.
The oscillation characteristic of the tone arm which worsens a tone quality is grasped making full use of computer analysis technology, such as an FFT analyzer, and the new organization DRA (Dynamic Resonance Absorber) developed based on this data is carried. DRA(s) are a damper with moderate spring nature, and a thing equipped with the subvibration object which consisted of waits, and have the structure of absorbing this, by giving the opposite oscillation to a vibration of an arm. According to this oscillating neutralizing influence, the needle point prevented taking up excessive components other than a sound track, and has obtained a more exact play sound.
The alumina ceramics is adopted as an arm material. comparing this material
with conventional aluminum -- a ratio -- rigidity is reducing the あり and the
vibration about 3 times.
The quick stop organization which used together
the motor, the electronic formula brake which applies the power of a reverse
rotation, and the mechanical brake which stops a rotation of a rotor using a
plunger by work of an electronic circuitry is carried.
The motor part
and the tone arm part are fixed to the base with a weight of 12kg which
laminated the barium sulfate of aluminum and high-density material.
Furthermore, the base was completely floated from the cabinet and the
vibration proof structure of the coaxial suspension scheme which intercepts the
oscillation from the sound pressure and the floor from a speaker is adopted.
In order to make a high howling margin possible, the insulator of the
Mie structure is adopted.
Special rubber is used, in order to support a 25kg
main unit with the oil dumping type waveguide-plunger structure using a 62mm
spring and also to make the surging of a spring absorb.
Moreover, since the
resonant frequency of the insulator is set as 5Hz or less lower than the
resonant frequency of a tone arm, the howling margin with high vibration proof structure and interval of a coaxial suspension has been obtained.
the design which combined the cabinet of native wood eye finish of the Brazi
LeAnn Lowe's wood, and the book jacket excellent in the prevention from a
howling made from tempered glass with the cabinet.
The very-thick power
cord using high oxygen free high conductivity copper of the conductometric was
adopted as the power cord, the loss in the wire rod was reduced, and nonlinear
distortion is improved sharply.
Furthermore, high-quality sound-ization is
attained more by performing a clear polar window.
||Cartridgeless player system
|<Phone motor part>
||Linear torque DC hall motor
||33 1 / 3 or 45rpm
|Rotational frequency precision
||0.003% (WRMS, the FG method)
(WRMS, the Japanese-Industrial-Standard record method)
|Opposite load characteristics
||With no rotational frequency transition (arm
1,000 duty) to 1.5kg of stylus forces
||0.3 second (33 1/3rpm o'clock)
||carrying out 32cm aluminum shaving
appearance (weight of 2.8kg)
||700kg-cm2 (it is an included
about a rubber sheet)
|<Tone arm part (EA-03)>
||Dynamic balance type twin pipe exchange
a straight-with integrated head shell pipe -- and
type universal pipe
|Arm effective length
||+ 1.85 degrees-1.10 degrees
|Stylus-force adjustable range
||0-3g (0.1g step)
|Conformity cartridge self-weight
6g-38g (S character
head shell 込)
(Wait exchange system)
|Height adjustable range
||With a low-impedance gilding plug
||Collet chuck scheme
||The low-pass brake style by silicon oil
(Dumping fator variable scheme)
|An attached organization
||Direct lever scheme anti skating
oil dumping scheme arm lifter
DRA (dynamic Resonance absorber)
||Brazi LeAnn Lowe's wood native wood eye
||5mm thickness smoked tempered glass
||A free stop, a removable
||Mie braking by a coil spring, oil, and
||A barium sulfate (15mm), an aluminum alloy
|A brake with a quick stop
||An electron, a mechanism combined use brake
|Manual operation button
||A feather touch, the soft push SW
||Width 600x height 278x depth of 445mm