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There is
a wealth of information in the grooves - and the cartridge. The
arm and the turntable dictate the foundation and the resolution
upon which the rest of the playback system is built upon.
I am continuously
amazed at the ability to open up (read, observe, feel and "see"),
the recorded ambience, stage dimensions, timbre, decay, and the
ability to decipher the recorded clues that the microphones picked
up and how they picked it up - all, by designing and manufacturing
those mechanical wonders, turntables, arm and cartridge, that can
do the tricks. Actually, those aren't 'tricks' at all; they are
sound-concepts, executions, and way of manufacturing...
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Judith Spotheim-Koreneeff
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SpJ
La Luce Turntable
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La Luce
turntable is the smallest of the Spotheim SpJ La Luce series.
La Luce
turntable is a low energy storage, direct-coupled, non-suspended
design. The transparent acrylic platter's mass and inertia is
increased by the embedded stainless steel weights around the platter
periphery.
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A
central, asymmetric acrylic block holds the bearing
house. The pick-up arm is directly connected to this
acrylic central block. An acrylic cylinder is bolted
to the underside of the central block and this forms
a T-shaped support.
La-Luce
turntable rests on three contact points and is levelled
by adjustment knobs on each side of the T-shape support.
All major components are individually machined from
billets of transparent acrylic. |
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The
ideal mechanical impedance match of the acrylic material
and record vinyl allows stylus-induced resonance to
pass smoothly into the mass of the platter and platform.
Platter revolving mass: 8-Kg.
A
soft belt drives the platter at 33.3-RPM or at the
45-RMP platter speed. The belt is connected to the
outboard direct drive synchronous AC motor, which is
set inside a massive metal housing. |
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SpJ
Alba Turntable
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The newest
edition to the SpJ turntable family is the humongous Alba turntable:
The Alba
design has two platters:
The top
(the record platter equipped with the record spindle and the clamp
system) is made of two layers: the top layer is a 42-mm thick
acrylic disk bolted to a soft aluminum disk platter of the same
330-mm outer diameter. That aluminum disk platter has three stainless
steel spikes that sits on top a seperate carrier, underneath platter;
Only the carrier platter makes contact with the belt. The carrier
platter's mass is encreased by thirty stainless steel vertically
placed cylinders.
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The Alba
turntable rests upon three stainless steel contact points and
is leveled by the two knobs on either side of the T-bar support.
A symmetric
ground-base aluminium plate 41-mm thick.
Stand-alone
motor house: 8-Kg stainless steel.
Driven
by a semi-soft single belt and a Direct-coupled Synchronous AC
motor. (Separate switch on the motor house reduces the running
motor voltage).
One-piece
sintered-bronze bearing: 7-Kg.
Platter's
Outer Diameter: 330-mm.
Platter's Height: 185-mm.
Platter's Total Revolving mass: 30-Kg. (7.5-Kg of the peripheral
weight revolves below the centre of gravity).
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SpJ
La Luce CS Centoventi turntable
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La Luce
top of the line, the C.S. Centoventi, is low energy storage, non-suspended
design, driven by a soft belt and a stand-alone motor set inside
a 9kg stainless steel cylinder-house. La Luce
C.S. Centoventi features a 120-mm thick platter with an outer
diameter of 330-mm. The transparent acrylic platter is machined
from one solid block.
Platter
mass and inertia is increased by embedded stainless steel weights
around the platter periphery. The ideal mechanical impedance match
of the acrylic material and record vinyl allows stylus-induced
resonance to pass smoothly into the mass of the platter and platform.
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La Luce
C.S.Centoventi platter weighs 18 Kg and the platter's massive,
one-piece 3 Kg sintered-bronze bearing, is hand matched to the
chrome-hardened steel, spindle shaft. A central, asymmetric, thick
solid acrylic block holds the bearing house and the arm ground
plate.
An acrylic
cylinder is bolted to the underside of the central block and this
forms a broad, T-shaped support. The La Luce rests on three contact
points and levelling is accomplished through adjustment polished
stainless steel knobs on each side of the support.
In addition
to the on-off switch, a separate optional switch allows the motor
to run on a reduced AC voltage.
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SpJ
Lyla Pick-up Arm
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The SpJ
Lyla pick-up arm has been designed in the manner of a precision
instrument, and has been manufactured to extremely fine tolerances
out of materials chosen to insure neutral and accurate playback
of analogue records.
The SpJ
Lyla pick-up arm is made of Titanium; it is a uni-pivot " I "-
shape design that places the stylus tip in a straight line with
both the arm wand longitude and the arm's pivot. The SpJ Lyla
carries a minimal lateral mass.
The SpJ
Lyla Offset-Angle is appropriate for an effective length of 312-mm
- according to the classical Bærwald tone arm geometry calculation,
which places the Null Radii at 66 and at120.9-mm from the turntable's
spindle center.
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VTA height setting is made possible even as the stylus tracks the grooves.• Spindle to pivot gauge to set the arm's pivot distance from the turntable spindle is supplied.
Gauge to
set the stylus effective length is also supplied.
Template
engraved with Bærwald two Null Radii, to check setting of the
cartridge offset angle is supplied with the SpJ Lyla. The template
can also be used to check setting of the cartridge azimuth.
The SpJ
Lyla pick-up arm may be used with cartridges weighing from 3 to
more than16 grams, due to add on or interchangeable stainless
steel counterbalances.
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SpJ
Ebony MC Cartridge
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Made
by Benz, Switzerland, to SpJ specifications,
And based on the advanced Ruby MK 3
Cartridge
weight; 10.7-grams.
- Body: Vented machined Air-dried African Ebony wood.
- Stylus: Fritz-Gayer Nude-Line-Contact diamond mirror polished.
- Cantilever: Hardened solid Boron.
- Vertical Tracking: 20 - 22 degree.
- Cartridge top metal plate: Cross-Form, Aircraft aluminum.
- Mounting: 2 X M-2.5 threaded holes.
- Output: .38-mV. (Utilizing .25mV output coil) at 3.54 cm/s.
- Coil former: Square Hollow Ruby Plate.
- Frequency response: 10 - 50,000 Hz (+/- 1dB)
- Balance: better than 0.5dB.
- Minimal Separation figure: 1000Hz: 38-dB
- Compliance: 13um/mN
- Recommended Loading: 500-47,000-ohms
- Recommended Tracking force: 1.8 - 2.2-gram
- Recommended tonearm mass: Medium to High mass.
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Click
here to read about my interview with Jonathan Skull,
Stereophile Magazine.
Click
here for some additional Stereophile Quotes.
Click
here to read a press release from the Vinyl Anachronist.
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