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ATLAS
Moving Coil Phono Cartridge
Introducing
the ATLAS, the world's first asymmetric MC phono cartridge.
The Atlas is
Lyra's new flagship. It is also the first time that anyone has
made an asymmetrically structured phono cartridge. Why asymmetric?
Because, by literally misplacing the barriers to great sound that
are present in every other cartridge today, it confers a number of
important performance benefits.
First, having
differently-shaped structures on the left and right sides
suppresses the formation of standing waves inside the cartridge
body, thereby creating a less resonant, more neutral cartridge
body. Second, the asymmetric construction offsets the front magnet
carrier and its associated mounting system so that it is no longer
in line with the cantilever assembly. Doing so opens up a direct,
solid path between the cantilever assembly and tonearm headshell
so that vibrations from the cantilever can be quickly drained away
once they have been converted into electrical signals, again
suppressing resonances.
Lyra remains
the only cartridge manufacturer to mount the cantilever assembly
directly into the cartridge body and thereby achieve a seamless,
totally rigid connection between cantilever assembly and headshell.
The effectiveness of this system has been increased with the
asymmetrical structure of the Atlas. Control over spurious
resonances is further assisted by the use of a narrowed mounting
area, which couples the Atlas more tightly to the headshell and
facilitates the transfer of vibrational energy into the tonearm.
While the
Atlas retains the yokeless dual magnet system, diamond-coated
boron rod cantilever and variable-radius line-contact stylus of
the Titan, the double knife-edge cantilever assembly mounting
structure has been revised for greater rigidity, and the signal
coil system is completely new. Rather than a square, the coil
former is in the shape of an X, which allows each channel to
operate with greater independence from the other. This gives
better tracking, tighter channel matching, improved separation,
and lower distortion due to crosstalk.
At the same
time we were able to increase both the performance and efficiency
of the generator coils. The Atlas has 12% higher output voltage
than the Titan, but accomplishes this while reducing the amount of
wire in the coils by 22%. The mass reduction further improves
tracking performance, while the enhanced output and electrical
characteristics allow phono stages to perform better.
The Atlas uses
Lyra's "New Angle" technology,
which mechanically pre-biases the signal coils so that they are
perfectly aligned to the front and rear magnets when LP playback
takes place. This equalizes out discrepancies in vertical and
horizontal compliances, and enables the Atlas' coils to move with
equal ease in all directions for optimal performance.
As with the
Titan and Olympos, the Atlas uses a body that is meticulously
carved from a solid billet of titanium, through a process that
involves both contact (for the exterior) and non-contact machining
(for the interior body structures). But by making most of the
Atlas' body surfaces non-parallel, avoiding dimensions that are
multiples of other dimensions, and adding a pre-stressed
phase-interference resonance-controlling system, resonances have
been inhibited further.
We firmly
believe that the Atlas represents an important step forward in LP
playback.
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Specifications |
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Designer |
Jonathan Carr |
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Builder |
Yoshinori Mishima |
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Type |
Medium weight, medium compliance, low-impedance moving coil
cartridge |
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Stylus |
Lyra-designed long-footprint variable-radius line-contact
nude diamond (3um x 70um), slot-mounted |
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Cantilever system |
Diamond-coated solid boron rod with short one-point wire
suspension, directly mounted into cartridge body via
high-pressure knife-edge system |
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Coils |
2-layer deep, 6N high-purity copper, cross-shaped
chemically-purified high-purity iron former, 4.2ohm
self-impedance, 11uH inductance |
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Output voltage |
0.56mV@5cm/sec., zero to peak, 45 degrees (CBS test record,
other test records may alter results) |
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Frequency range |
10Hz ~ 50kHz |
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Channel separation |
35dB or better at 1kHz |
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Compliance |
Approx. 12 x 10-6cm/dyne at 100Hz |
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Vertical tracking angle |
20 degrees |
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Cartridge body |
One-piece machining from solid titanium billet, with
reduced-surface higher-pressure headshell contact area,
predominately non-parallel and asymmetrical shaping,
phase-interference resonance-controlling mechanism, and body
threaded directly for mounting screws |
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Cartridge mounting screws |
2.6mm 0.45 pitch JIS standard |
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Distance from mounting
holes to stylus tip |
9.5mm |
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Cartridge weight (without
stylus cover) |
11.6g |
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Recommended tracking force |
1.65 ~ 1.75g (1.72g recommended) |
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Recommended load directly
into MC phono input |
104ohm ~ 887ohm (determine by listening, or follow detailed
guidelines in user manual) |
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Recommended load via
step-up transformer |
5 ~ 15ohm (step-up transformer's output must be connected to
10kohm ~ 47kohm MM-level RIAA input, preferably via short,
low-capacitance cable) |
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Recommended tonearms |
High-quality pivoted or linear (tangential) tonearms with
rigid bearing(s), adjustable anti-skating force, preferably
VTA adjustment |
Specifications subject to change without notice. |
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