Shure V15 Type IV SUPER TRACK IV User Manual page 9

The Hyperelliptical Stylus tip
BIRADLAL IELLIPTlCALl STYLUS
HYPERELLIPTICAL
STYLUS
SUCH A S I N
V15
TYPE I11
OF THE
V15
TYPE
I V
The Hyperelliptical nude diamond tip
configuration of the V15 Type Nrepresents a
significant advance in tip design for stereo
sound reproduction. As the above figures
show, its "footprint" (represented by black
oval1 is longer and narrower than the tradi-
tional Biradial IElliptical) tip-gmove contact
area. Because the Hyperelliptical footprint
geometry is narrower than both the Biradial
and long-contact shapes such as the Hyper-
bolic,it is preeminent forreproduction ofthe
Stereo-cut groove. In fact, as a result of the
optimized contact area of the Hyperelliptical
tip, both harmonic distortion !white bars in
graph at right) and intermodulation distor-
tion (black bars1 are dramatically reduced.
2nd harmonlc dlstortbon
Average both channels.
8 kHz. 5 cmisec peak recorded veloclty
Intermodulation distortton
Average both channels,
3
kHzil.5 kHz
4.0% 4.0%
2.4% 2.596
HERICAL b BOLlC BlRADlAL HYPERELLIPTICA
HARMONIC AND INTERMODULATION
DISTORTION FOR VARIOUS TIP SHAPES