V-15 Stereo Dynetic Cartridge
Product Information
The Shure V-15 Stereo Dynetic Cartridge is a high-fidelity
cartridge manufactured by Shure Brothers, Inc. It is designed to
provide exceptional sound quality and is known for its
revolutionary Bi-Radial Elliptical Stylus. The cartridge is
manufactured under U.S. Patents 3,055,988, 3,077,521, and
3,077,522, with additional patents pending.
The V-15 cartridge undergoes rigorous quality control measures,
including testing and microscopic examination of individual
cartridges and Stylus-Magnet Assemblies. Each finished cartridge is
then tested electrically, mechanically, and acoustically to ensure
it meets Shure’s high standards of quality and tolerance
specifications.
Product Usage Instructions
- Ensure that your turntable is properly set up and
calibrated. - Remove the protective cover from the V-15 cartridge.
- Gently align the cartridge with the tonearm of your turntable,
making sure the stylus aligns with the record grooves. - Lower the cartridge onto the tonearm, taking care not to apply
excessive force. - Secure the cartridge onto the tonearm according to the
manufacturer’s instructions. - Connect the tonearm cables to the designated phono inputs on
your audio system. - Ensure that all connections are secure and properly
grounded. - Start playing your records and adjust the tracking force and
anti-skate settings according to your turntable’s
instructions. - Enjoy the exceptional sound quality provided by the Shure V-15
Stereo Dynetic Cartridge.
QUALITY ASSURANCE CERTIFICATE
SHURE V-15 SERIES OF STEREO 15°
DYNETIC HIGH FIDELITY CARTRIDGES
The V-15 Stereo 15° Dynetic Cartridge has been manufactured under the Shure Master Quality Control Program. This program embraces the stringent safeguards and standards required by your V-15 to assure you that it is in perfect operating condition.
Shure quality control not only covers incoming parts and the finished product, but intermediate sub-assemblies as well. For example: every individual cartridge and every Stylus-Magnet Assembly is tested and microscopically examined. Each finished cartridge is again tested electrically, mechanically and acoustically against quality and tolerance specifications seldom achieved in the High Fidelity industry.
Manufactured under U.S. Patents 3,055,988, 3,077,521, and 3,077,522. Other patents pending.
SHURE BROTHERS, INC. 222 Hartrey Avenue, Evanston, Illinois, U.S.A.
World standard wherever sound quality is paramount
27A268
Printed in U.S. A.
sH U R E
V-15 STEREO DYNETIC® HIGH FIDELITY PHONO CARTRIDGE
THE SOUND FROM THE NEW SHURE V-15 STEREO DYNETIC ® CARTRIDGE
WITH ITS REVOLUTIONARY Bl-RADIAL ELLIPTICAL STYLUS HAS NEVER BEFORE BEEN HEARD OUTSIDE
AUDIO LABORATORIES
The sound from the new Shure V-15 Stereo Dynetic Cartridge is unique. The unit incorporates
highly disciplined refinements in design and manufacture It re-creates music
with a transcendent purity that results in a deeply rewarding experience for the critical ear.
THE Bl·RADIAL ELLIPTICAL STYLUS
The outstanding characteristic is that the V-15′ s Stylus has two different radii . . . hence the designation Bi-Radial. One is a broad frontal plane radius of 17.8 microns (.0007 inch); while the actual contact radii on each side of the stylus are an incredibly fine 5 microns (.0002 inch) . It would be impossible to reduce the contact radius of a conventional spherical/conical stylus to this micro-miniature dimension without subjecting the entire stylus to “bottoming” in the record grooves.
The Shure Bi-Radial elliptical stylus, because of its larger frontal radius of 17.8 microns (.0007 inch), cannot bottom . . . and as you know, bottoming reproduces the crackling noise of the grit and static dust that in practice cannot be eliminated from the canyons of record grooves.
SMALL
RADIUS
5 MICRONS
(.0002”)
TRACING Th e prim e o bj e ctive in fa it h ful so und re crea tion DISTORTION is to have th e playback s tylus move
in exac tl y th e sa m e w a y as th e wed ge-
MINIMIZED shaped cu tting stylus moved w he n it pro-
du ced th e mas te r record . Thi s can’t be acco m p li shed with a spheri ca l/coni ca l slylus b ecau se th e points o f ta n ge ncy (or po ints o f co nt ac t be twee n th e reco rd grooves a nd th e stylus) are constantly c han g in g. Thi s e ffec t manifes ts it se lf as tra cin g di s tortion (s ometimes ca lled “inner groove distortion”) . No te in the illu stra tio n how th e p o int s o f tange ncy
(arrows) of th e Bi-Radia l e llipti ca l stylu s remain rela-
tivel y con stant b ecau se o f the ve ry s m a ll 5 mi c ro n (.00 02 in c h ) s id e cont ac t radii.
The Shu re Bi -Radi a l Sty lu s
vas tl y re du ce s a n o th e r
problem in playba ck known
Cutter
Conical
as th e ” pinch e ffe ct. ” As
ex p e ri e n ce d a udiophil es
know , th e re cord g rooves are w id e r w he rever an d whenever th e
fl a t, chisel-faced cutting slylus c ha ng es d ire c tions (w hi c h is 440
cycles per seco nd at a p ure middle ” A” tone-up to 20,000 cycles per second in some of the hig h overtones). An o rdinary spherical/conical stylus riding the uppe r po rtion of the groove wa lls tends to drop w here the g roove ge ts w ider, and to rise as the groove nar rows. Since ste reo sty li a nd car tridges have both ve rti ca l a nd horizontal fu nctions, this un fortunate a nd unwanted up-and-down mo tion creates a second harmonic distortion. However, s ince the Shure Bi- Radial e lliptical s tylus has a broad front face wit h a f1ontal p lane radi us o f 17.8 microns (.0007 inch), an d it meas ures 25.4 microns (.0010 inch) across at the poi nt of co ntact w ith the groove, the sma ll side o r contact radi i are o nly 5 micron, (.0002 inc h). This confo rms to the co nfigu1ation of the cu tting sty lus a nd hence is not as sub ject to the up-and-down vagaries o f the so-ca lled ” pinch-effect.”
SYMMETRY, TOLERANCES AND POSITIONING ARE ULTRA-CRITICAL
Frankly, a Bi-Radial elliptical stylus, however desirable, is almost impossibly difficult to make CORRECTLY. Diamond, as you know, is th e hardest material . . . with a rating of 10 on the Mohs
3
ha rdn ess sca le . It’s o ne thin g to ma ke a sim p le dia mo nd co ne, a ltogethe r an othe r to make a p erfect ly symmetrical Bi-Rad ia l sty lu s w ith suffic ie n tly close to lerances, actua ll y wi thin o ne te n tho usa ndths o f a n in ch! Shure has deve lo pe d unpreced e nted contro ls, inspect io ns a nd manu facturin g techni q ues to ass u re precise position in g, co nfig ura tio n, dim e nsio ns a nd to le rances of th e di amo nd t ip. It is a sin gula r and exacting procedure … uniqu e in th e hi gh fidel ity ca rt ri d ge in d ust ry. And, u nless th ese in spe ctio n tec h niques a nd safe gu a rd s a re used , a n impe rfect ly form e d e lli ptic co nfig urat io n can result a nd lite ra lly d o more harm th an goo d to bo th reco rd and sound.
CARTRIDGE
STYLUS
4
RECORD SURFACE
THE V-15 IS A
15° CARTRIDGE
Th e 15° effec ti ve tra ck in g angle has rece n tly been t h e s u b ject o f seve ra l Sh ure commu ni ca tio ns to
the audiophile . It conforms to the effective record cutting angle of 15° proposed by the RIAA and EIA and now used by the major record producing companies and thereby minimizes tracking distortion .
The major features, then, of the V-15 are Shure’s Bl-Radial Elliptical tylus, the singular quality control techniques and standards devised to produce perfection of stylus symmetry, and
the 15° tracking angle . They combine to reduce IM and harmonic
distortion lo a dramatic new low. In fact 1 the ·distortion (at normal record playing velocities) is lower than the inher.ent noise
lev.el of the finest test records and laboratory measurement in-
struments! In extensive listening tests, the V-15 proved most impressive in its ” track-ability ‘ ‘ It consis tently proved capable of tracking the most difficult, heavily modulated passages at a
minimum force of 3/4 grams (in the Shure-SME tone arm). The
enti re V-15 is hand- crafted and subject to quality control and
Inspection measures that result in space-age rellability. Precison Precision machined aluminumand a special ultra-stab le plastic stylus grip.
Exact alignment iasssured in every inte rna l detail-and in mountin g. Mu-metal hum shie ld surrounds the sensitive coils. Gold plated terminals. Individually packaged in walnut box. The V-15 is a patented moving-magnet device-a connoisseur’s cartridge in every detail.
5
SHURE V-15 DIMENSIONAL DRAWING
600
(15.2mm)
SHURE 6
MOUNTING
The V-15 Dynetic Cartridge has standard 1/2″(12.7 mm) mounting ce nters (See drawing). Hardware is supplied with each cartridge for mounting purposes , In so me tone arms and plug- in shells, the cartridge sits so deep that the stylus cannot be con ve niently replaced. For these applications, spacers are provided to insure adequate clearance for stylus removal
SHURE-SME MOUNTING:
To mount the V-15 in the Shure-SME or the SME Precision Pickup Arm, Model 3009 and 3012, refer to the paragraphs on Cartridge Installation and Balancing in the Instruction Manual supplied with the pickup arms.
GARRARD LAB 80 AND A70 MOUNTING:
The Garrard Lab 80 and A70 Pickup H ead Shells have special Briti sh threads. In order to mount the Shure V-15 Cartridge, use the two special brass screws supplied with the cartridge.
NOTE:
If hum is experienced when cartridge is installed in a metai head, removal of the ground tab from the right ground terminal will probably correct the condition. (See illustration under CO NNECTIONS, page 8.)
OPERATION
The recommended needle forces for optimum results are listed under ” Specifications.” Forces greater than the indicated ” Maximum” should not be used.
Th V-15 cartridge should be installed in any arm especially designed for low tracking forces and having low friction at all bearing surfaces such as the Shure-SME arm. Although the V-15 cartridge wi ll track records at 3/4 gram, it may be necessary, when used in certain phono arms, to increase the tracking force for op timum resu lts.
The unique Bi-Radial elliptical stylus plays monophonic LP as well as stereo records.
The V-15 Styli lncorporate a new retractile design that prevents audible record- scratchor sty lus damage. When excessive force is applied to the stylus, it momen tarily retracts and a soft plastic safety bumper comes in contact with the reco rd. This bumper is incorporated into the stylus finger-g rip and is pre-set and adjusted at the fa ctory to accommodate the minute differences between styli. Do not attemp t to re-adjust or in any way tamper with this precise ad justment. NOTE: For playing 78 R.P.M. records the Model N44-3 (.0027″)
Diamond Stylus is available.
CONNECTIONS
CAUTION: Do not make solder connections to cartridge terminals. Make .all solder connections to terminal jacks provided. Soldering should not be done while jacks are on cartridge terminals. 8
The Model V-15 Cartridge utilizes a 4-terminal arrangement for connections having a separate ground terminal for each channel. (See
LEFT CHANNEL TERMINAL (WHITE RING)
Illustration).
Fo r Stereo reprodu ction terminal RIGHT
” R” and its ground terminal ” RG ”
rep resent the right channel (o ut-
side groove wall) . Terminal ” L”
and its ground terminal “LG” represe nt the left channe l (inside groove wall) ,
4-Lead Stereo Connection: To use a 4-lead arrangement, connect the
LEFT CHANNEL GROUND TERMINAL
(BLUE RING)
GROUND TAB
RIGHT CHANNEL GROUND TERMINAL GROUNDEO TO CASE
(GREEN RING)
“hot” lead of the right channe l to
terminal “R” and the shield or ground lead of the right channel
to terminal “RG.” Con nect the “hot” lead of the left channel
to terminal “L” and the shield or ground lead of the left channel
to “LG.” To prevent ” ground loops” and hum, no common
connection should be used at the cartridge terminals.
3-Lead Stereo Connection: When a 3-lead stereo input system is used, the common lead should be connected to both of the ground terminals at the cartridge. No other common ground connection should exist. A ” double loop” pin jack is provided to make a convenient connection between the two ground terminals-simply slide the loop ends onto the ground terminals. This connection should be made before connecting the regular terminal jacks to the cartridge. Connect ground pin jack to either
terminal.
9
For single channel reproduction of Monaural or Stereo recordings, connect the “hot” lead to both ” R’ ‘ ·and “L”termlnals and connect the ground or shield lead to both of the ground terminals marked “RG” and “LG.’ Double loop pin jacks are provided to make convenient connections between the ” R” and “L” terminals and between the two ground terminals. These connections should be made before connecting the regular terminal Jacks to the cartridge.
It is important to maintain correct phasing of both loudspeakers.
Although the phasing of rhe cartridges are carefully, controlled, there are many possibilities where a particular High Fidelity system can cause opposite phasi ng of the sound from the speakers. The phasing can be easily checked by a listening test. Play a monaural record. Reverse the connections of the wlres to one speaker. This can be done at the amplifier or the speaker whichever is more convenient. When the sound appears to come from a poin t halfway between the speakers, they are in phase. Also, bass reprodu ction will be much fuller when speakers are correctly phased.
The Dynetic stylus assembly used in these cartridges is the most critical component. To maintain the original performance standards of your cartridge, be certain that any replacement stylus you buy bears the following certification on the package: “This 10 Dynetic stylus is precision manufactured by Shure Brothers, Inc.”
Avoid inferior imitations. Th ey will seriously degrade the perfo rman ce of your cart ridg e. All gen uine “Dynetic” styl i are manufactured by Shure Brothers, Inc. The stylu s ass embly, when installed in the cartridge, is practically immune to damage during normal usage. However, care should be taken to avoid bending or distorting the stylus assembly when il is installed or removed.
STYLUS REPLACEMENT
Stylus replacement is very simple and fast. To replace-grasp molded housi ng of stylus between thumb and forefinger. Gently withdraw stylus by pulling forward out of cartridge. Grasp replacement stylus between thumb and fore.finger and insert into stylus socket. Press stylus into socket until the molded housing of the slylus touches Ihe cartridge case. Care must be taken not to allow the finger to sl ip off the molded housi ng of the stylu s resulting in damage to the stylus tip or shank.
The V-15 Stereo Dynetic Cartridge is guaranteed to be free from electrical and mechanical defects for one year from the date of shipment from the factory, provided all instructions are complied with fully . The Guarantee does not cover stylus wear, nor does it cover damage to the stylus assembly from abuse or mishandling.
SERVICE PROTECTION-ACCIDENTAL DAMAGE
Shure Dynetic Styli will withstand long, continued usage. However, ii the stylus assembly should be damaged due to accidental mishandling, and the diamond tip is still intact, the stylus assembly may be returned to the factory for servicing and testing to original performance standards at a nominal service charge of $7.50. (Please enclose a check for the service charge with the returned assembly.)
Return Stylus to: Service Departm ent
SHURE BROTHERS, INC.
SPECIFICATIONS
Frequency Response: 20 to 20,000 cps Output Voltage: 6.6 mv per channel at 1000 cps (at 5
cm/sec) Channel Balance: Output f rom each channel within 2 db Channel Separation: Over 25 db from 20 to 5,000 cps.
Over 20 db from 5,000 to 10,000 cps
Tracking force: ¾ to 1½ grams
Compliance: vertica l, horizontal-25 x 10·· cm per dyne Recommended Load Impedance: 47,000 ohms (per
channe l) Inductance: 720 millihenries D.C. Resistance: 630 ohms Terminals: 4 terminal (with loop pin for 3 terminal
connection) Stylus: VN-2E Bi-Radial Elliptical Stylus Diamond tip.
17.8 microns (.0007 inch) frontal radius· 5 microns (.0002 inch) side contact radii; 25.4 microns (.0010 inch) wide between record
contact points Mounting: Standard ½” (12.7 mm) mounting center Weight: Net weight-11 grams
Packaged weight-6½ ounces (184 grams)
