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Servants to the Music
Our record players serve one master — music. Engineering, materials,
even our sleek, no-nonsense industrial design conspire to deliver no
more than the performance that is pressed into the vinyl groove.
And, of course, no less.
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Our Turntables
As a medium for capturing music, vinyl remains unsurpassed. To convey its
rich and nuanced potential, a turntable must, at the very least, achieve a high
degree of control over the speed of its platter and the transfer of energy among
its components. Noise is the nemesis, an uncompromised signal emerging
from a silent background the goal.
Spiral Groove turntables rely in part on mass to control noise. Stainless steel
and aluminum lend our ‘tables heft and solidity, an effective rst-line defense
against errant vibration. But mass alone cannot eliminate noise; though the
metals we’ve chosen store and release energy in predictable ways, they need help
in order to dissipate it effectively. We provide that assistance by sandwiching
together the layers of our platform with a proven damping agent.
Mechanical isolation contributes an additional measure of control. Motor,
tonearm, and platter occupy discrete layers within the platform, a tactical separation that prevents noise generated by one mechanism from contaminating
another. This strategic alliance — rigidity, compliance, and isolation — lays
the groundwork for one of the quietest and most responsive turntables on the
market today.
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Features
• Stainless steel platter ring for increased
speed stability
• Inverted sapphire disc/ceramic ball bearing for
low noise and long wear
• Electronically selectable speed control:
33 1/3 and 45 rpm
• Quick-change bayonet-mounted arm board
• Spindle de-coupled from bearing for optimal
mechanical isolation of record
• Platter driven at rotational plane of bearing for
wobble-free revolution
• Low voltage/high torque AC synchronous motor
• Adjustable, sound-damping, stainless steel feet
Specications
• Dimensions: 18.5"W x 15"D x 4.5"H
(470 mm x 380mm x 115 mm)
• Weight : ~70 lbs. (~32 kg)
Noise is the nemesis, an uncompromised signal
emerging from a silent background the goal.
Because a turntable’s platter is where the rubber meets the road, its design
is of critical importance. Unlike most other turntables, our ‘tables’ spindle
and platter bearing are decoupled and yet precisely aligned. Severing the
connection between these two critical components dramatically reduces the
transfer of energy between them, lowering still further our ‘tables’ noise oor
while ensuring unparalleled depth and specicity of image.
Moreover, the Spiral Groove platter is driven on the rotational plane of the
bearing, which eliminates wobble. A thick phenolic layer forms the bulk of the
platter, followed by two thinner layers, one of vinyl, the other of graphite. A clamp
made of stainless steel and anodized aluminum snugs the record to the graphite, providing the stylus with an absolutely at work surface. This is a platter to
which you can entrust even your most pampered LPs, over and over again.
Powering the platter is a 12-volt AC motor and outboard analog sine-wave
generator. Toward our goal of maximum control, we build drag into our platter
and then provide enough torque to spin it precisely. Our sine-wave generator
liberates our motor from the fluctuations of wall current and guarantees
accurate rotation at both 33 1/3 and 45 revolutions per minute.
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Features
• Aluminum platter ring for increased speed stability
• Inverted sapphire disc/ceramic ball bearing for
low noise and long wear
• Electronically selectable speed control:
33 1/3 and 45 rpm
• Removable arm board
• Spindle de-coupled from bearing for optimal
mechanical isolation of record
• Platter driven at rotational plane of bearing for
wobble-free revolution
• Low voltage/high torque AC synchronous motor
• Adjustable, sound-damping, aluminum feet
Specications
• Dimensions: 18.5"W x 15"D x 4.5" H
(470 mm x 380mm x 115 mm)
• Weight : ~50 lbs. (~23 kg)
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Our Tonearm
Structural rigidity and the efcient dissipation of unwanted mechanical
energy are hallmarks of the Spiral Groove tonearm as well. Three criteria
have determined our choice of tonearm materials: low mass, high strength,
and the ability to transfer energy quickly away from the cartridge. Moreover,
in order to give that energy somewhere to go, we have established a
direct link between cartridge and mechanical ground. No other tonearm
available today dispenses with wayward energy more effectively.
Optimal rigidity and the exceptionally fast transfer of energy from
headshell to ground are just two of the reasons our tonearm delivers
unsurpassed speed, dynamic energy, and tonal purity. Another is its
overall balance. Unlike most other tonearm designers, we use advanced
computer modeling to simulate the forces exerted on the arm as the
cartridge tracks the record. Understanding these forces dynamically has
enabled us to compensate for them mechanically. We call our approach
Balanced Force DesignTM, and with it we have greatly improved tracking
and optimized cartridge performance.
The Spiral Groove tonearm was designed not only to set new engineering
standards but also to please users. Like Spiral Groove turntables,
our tonearm is exceedingly user-friendly. In order to deliver their best
performance, high-end cartridges require tonearms that facilitate precise
alignment. On our tonearm, the overhang, VTA, azimuth, zenith, anti-skate
control and tracking force are all easily adjustable. Our proprietary mirror
setup gauge, included with each arm, makes adjustments easier still.
tonearm
Features
• Balanced Force DesignTM - modal analysis places centroid at bearing point
• Counter-weight design minimizes moment of inertia by staying close to bearing
• 10" pivot to stylus distance
• Swiss made sapphire bearing cup and steel pin
• “Zero tolerance” unipivot bearing design
• Multi-layered, damped arm tube
• Low mass, high strength aluminum/carbon ber arm tube
• High purity copper internal wiring
• Overhang, VTA, Azimuth, Zenith, Anti-skate and Tracking force all
easily adjustable
• Precise mirror set-up gauge included
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Spiral Groove’s cofounder and principal designer, Allen Perkins, has
engineered high-performance turntables since the 1980s. The design
philosophy he brings to all his products is simple and to the point —
design from the ground up; question even the most fundamental
assumptions; accept only the most elemental solutions, and then
perfect them. Spiral Groove’s turntables and tonearm epitomize this
philosophy. A marriage of exquisite design, precision machining, and
the best of modern materials, they are simple, elegant, reliable, and
faithful to the source.
1010 grayson street, suite 1, berkeley, ca 94710
510.665.1615
www.spiral-groove.com
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