Sota Cosmos Series IV Vacuum Turntable (Wood Finish)
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The Cosmos represents the ultimate expression of Sota’s critically acclaimed
turntable engineering. To neutralize the resonant LP, to couple it hard and fast
against the ideal surface, the design objectives of Dynamic Stability (the
control of forces present in a dynamic system), Environmental Isolation (the
control of forces from "outside" the turntable’s world), Easy Set-up (guaranteed
results in all situations), Control Over Vinyl Resonance and Variations, (which
would otherwise undermine the performance of even the best turntables) and
Control Over Power Line Impurities (which are present in all installations and
result in sonic anomalies if not controlled), are all addressed in the design of
the Sota Cosmos turntable. With the Sota Cosmos, turntable design has been
carried to its logical conclusion, with the most comprehensive, scientific
approach to identifying all the universal variables that undermine pure signal
The Cosmos takes ultimate rigidity/mass damping in sub-assembly, arm mounting,
motor coupling and bearing structure to new absolutes. The chassis is hung on a
floating seismic platform of four-point spring suspension. The chassis utilizes
a one-piece milled solid aluminum sub-assembly as the foundation. It is so
effective that the platter, motor and arm block are mounted directly on the
suspended sub-chassis. This provides an unvarying geometry between the motor and
the turntable. The dampened sub-chassis and multi-layered platter isolate the
arm and record surface from motor vibrations.
The Cosmos utilizes Sota’s internally dampened, multi-layer 15-pound vacuum
platter system with the Vinyl Format Mat. The dampened platter with Vinyl Format
exactly matches the mechanical impedance of record vinyl - further optimized by
its total inertness. The record, mat and platter function as a single,
non-resonant entity. The Cosmos platter incorporates Sota’s inverted bearing
assembly design, utilizing a polished sapphire thrust plate with zirconium
bearing. The Sota self-sensing record-hold-down system uses a high-tech
pneumatic sensing circuit to provide vacuum clamping and maintenance of exact
low-pressure vacuum hold-down. The synthesized sine-wave drive 24-pole A/C
stepper motor, designed for critical computerized motion use, has electronic
speed control and speed change.
The Cosmos cabinet has historically been made of critically-damped
Fountainhead™, by Nevamar™, a beautiful and inert material, including the
matching Fountainhead cabinet for the Pump/Power Supply unit. Sota's latest
design enhancement will also feature a removable control cover for easy belt
The Cosmos Vacuum Turntable includes the Cosmos Armboard, for universal tonearm
compatibility, and a Reflex Clamp. The Cosmos Armboard is multi layers of
acrylic, aluminum and lead in a constrained mode and high polished. The ultimate
mechanical clamping system, the Sota Reflex Clamp assures intimate contact
between the record and the mat over its entire surface. The clear beveled-seamed
acrylic dust cover with milled aluminum tension hinges is available as an
additional cost option.
The Cosmos may also be upgraded to the new top-of-the-line turntable, the
Available in 6 different finishes! Black Matrix Fountainhead, Gray Matrix
Fountainhead, American Cherry, Piano Gloss Black Acrylic and Exotic Woods as
African Rosewood and Macassar Ebony. Make Sure you choose your finish or the
default American Cherry will be applied. Your custom choice may too be
"...my new Series III Cosmos threw a cavernous stage that was evenly
illuminated from front to back and from side to side. The oiled-rosewood cabinet
was eye-poppingly gorgeous, with a rich, vivid, high-contrast grain and
painstakingly crafted corner joints." - Paul Bolin, Stereophile, July 2003
"The SOTAs are the only suspended turntables that are absolutely,
unconditionally stable over time, a statement I make from personal experience."
- Paul Seydor, The Absolute Sound
New Design features:
Improved Chassis and Motor Assembly Dampening to enhance internal and external
Removable Control Cover for easy belt access
Rumble: less than -60db unweighted (10cm/sec @ 1000Hz)
Wow & Flutter: less than .04% RMS
Suspension: tuned 4-point stretched-spring sub-chassis, 2.55 Hz frequency
Platter: individually balanced 12 lb one-piece cast platter with internal
damping, lead flywheel ring, Sota Vinyl Format Platter Mat, molded silicone
vacuum lip and anti-static Groove Damper Mat
Vacuum System: electronic-sensing, provides LP clamping vacuum pressure of 3.0”
Hg, +/- 0.2” Hg
Shaft: hardened steel, hand matched to sintered bronze sleeves
Motor: 24 Pole A/C Stepper Motor
Bearing: thrust pad; polished sapphire disc; thrust point: zirconium ball
Transmission: belt driven
Speeds: 33-1/3 and 45 RPM, electronically switchable with fine tuning
Weight: 44 lb (20 kg) turntable only; 20 lb (9 kg) pump and motor unit
Dimensions: 7-1/2"H (to top of dust cover), 20-1/4"W, 16-1/2"D
Black Matrix Fountainhead, Gray Matrix Fountainhead, American Cherry, Piano
Gloss Black Acrylic and Exotic Woods as African Rosewood and Macassar Ebony.
Make Sure you choose your finish or the default American Cherry will be applied.
To learn more of the basic goals of achieving maximum information retrieval from
Optional Dust Cover also available.