The V15VxMR
(See illustrations on inside back cover.)
The Micro-Ridge diamond tip and the beryllium stylus
cantilever of the V15VxMR combine to achieve the
highest trackability and most detailed and accurate
playback possible, allowing the listener to hear musical
sounds that were previously hidden in the record
grooves. The use of these and other design features of
the V15VxMR result in the most accurate tracing of a
phonograph record groove yet obtained.
The V15VxMR offers all these outstanding features
and benefits:
• The highest known trackability at 1 gram for ex-
tended record and tip life
• Beryllium MICROWALL/Be
affords superior trackability for accurate sound
reproduction
• MASAR
™
mizes distortion and record wear
-polished Micro-Ridge stylus tip mini-
• Ultra-flat frequency response, higher output,
and superior signal-to-noise level from high-efficiency magnetic structure
• Dynamic Stabilizer/Destaticizer overcomes
record warp, dust, and surface static electricity
• Exclusive SIDE-GUARD stylus protection sys-
t e m g u a r d s a g a i n s t a c c i d e n t a l s t y l u s d a m a g e
Trackability is the stylus' ability to stay in contact with
the record groove walls at a given tracking force. The
most demanding signals on a record are usually
high-level, high-frequency sounds and sharp
transients. Mistracking of any signal can cause record
groove damage that permanently reduces future
reproduction accuracy.
Trackability can be improved by increasing stylus
tracking force at the expense of record and stylus tip
wear. The V15 achieves high trackability without
making these sacrifices.
™
stylus cantilever
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The V15VxMR's Micro-Ridge stylus tip and low
effective-mass
MICROWALL/Be stylus structure
almost double previously achieved high frequency
trackability at 10 kHz - at an optimum stylus force of
only one gram!
Beryllium MICROWALL/Be
Stylus Cantilever for
Lowest Effective Mass Ever!
Beryllium has extremely low mass and high stiffness.
These properties result in superior performance,
however, only when the material is geometrically
optimized. The ultra-thin (0.0005-inch) beryllium
MICROWALL/Be tube, shown in Figure 1c, has the
lowest effective mass and highest ratio of stiffness to
mass of any stylus cantilever ever, resulting in
unprecedented high-frequency trackability.
Below is the Stiffness to Mass ratio for the three
different types of beryllium cantilevers shown in
Figure 1 (inside back cover).
a b c
SOLID ROD
10 mil dia.
Stiffness/Mass
Ratio: 1
2 mil WALL
12 mil dia.
Stiffness/Mass
Ratio: 2
0.5 mil MICROWALL
18 mil dia.
Stiffness/Mass
Ratio: 6.25
The physical characteristics of beryllium allow a
longer length low-mass stylus structure. The resultant
longer cantilever achieves the proper vertical tracking
angle for a better match to the recorded signal and
lower distortion.
MASAR-Polished Micro-Ridge (MR) stylus tip
The MR Micro-Ridge stylus tip has a very small
tracing radius, as shown in Figure 2, that reduces
distortion and minimizes record surface indentation for
long record life.
The very low mass of the nude, gem-stone quality
diamond tip of the V15VxMR helps minimize the total
effective stylus mass.
The areas of the diamond actually in contact with the
record are MASAR-polished, an ultra-smooth
polishing technique for reducing surface noise and
record wear.
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ENGLISH
Ultra-flat frequency response
MICROWALL/Be cantilever raises the stylus
The
mechanical resonance frequency to 33 kHz, well
beyond the audible range, ensuring the flat response
shown in Figure 3, as well as superior high-frequency
channel separation.
The V15VxMR features high output levels with fewer
turns of wire on its coils, which results in a lower
impedance at the output terminals, making the
frequency response of the cartridge less sensitive to
capacitive and resistive loading.
The Dynamic Stabilizer/Destaticizer
Shure's exclusive Dynamic Stabilizer acts like a
miniature shock absorber, maintaining a constant
cartridge-to-record distance, as shown in Figure 4, to
ensure uniform tracking force. This minimizes such
warp-related problems as groove skipping, cartridge
bottoming, signal wow, and even amplifier and/or
speaker overload.
The viscous-damped Dynamic Stabilizer attenuates the
arm-cartridge system resonance effect that causes large
increases in sub-audio frequency output and possible
mistracking.
When in the “operating” or “guard” positions (see
Figure V in the Installation Manual), the Dynamic
Stabilizer protects the stylus and record from damage
if the tone arm is accidentally dropped onto the record.
As shown in Figure 5, there are over 10,000 tiny,
electrically conductive fibers in the Dynamic Stabilizer
brush. These tiny fibers discharge surface static
electricity and, though not meant to be the primary
record cleaning mechanism, do sweep away
microscopic dust particles.
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SIDE-GUARD Stylus Protection System
SIDE-GUARD stylus protection system, shown in
The
Figure 6, helps prevent stylus damage if the cartridge
accidentally slides across a record.
The
SIDE-GUARD stylus protection system responds to
side thrusts on the stylus by withdrawing the entire
stylus cantilever and tip safely into the stylus housing
before the cantilever can be damaged.
Specifications
Frequency Response: 10 to 25,000 Hz
Channel Balance: Within 1.5 dB
Channel Separation: 1 kHz - 25 dB or greater
Trackability at 1 gram (10 mN ) Tracking Force (typi-
cal values shown in cm/sec peak velocity):
400 Hz: 30 cm/sec
1 kHz: 46 cm/sec
5 kHz: 80 cm/sec
10 kHz: 60 cm/sec
Tracking Force:
Force at the
stylus tip
Optimum 1.0 g (10 mN) 1.5 g (15 mN )
Maximum 1.25 g (12.5 mN) 1.75 g (17.5 mN)
Output Voltage (typical):
3 mV RMS at 1 kHz at 5 cm/sec peak velocity
Recommended Load:
Resistance (typical): 1000 Ω dc
Inductance (typical): 425 mH at 1 kHz
Cartridge Weight: 6.6 grams
Replacement Stylus: VN5xMR, nude Micro-Ridge tip
3.8 x 75 µ (.00015 x .003 in.), burgundy-colored grip
Certification: Conforms to European Union directives,
eligible to bear CE marking; meets European Union
EMC Immunity Requirem ents: EN 50 082-1, 1992 [ESD
(IEC 801-2)]
10 kHz -18 dB or greater
Total Tone Arm Force
setting with Dynamic Stabilizer operating
47 kΩ in parallel with 250 pF
ENGLISH
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