Shure M97 User Manual

MS7

Series

Stereo

Phono

DYNETIC@

Cartridges

ERA IV Features

WHAT THEY ARE:

Its

vrscous dampfng reslsts sudden changes In motion, enabllng the
tone arm to follow the
Every tone arm-cartridge
very low frequency. When the resonance frequency coincides with
the warp frequency, warp effects are exaggerated: sudden and
changes in arm-to-record distance occur, causing drastlc increases

of

the

M97

Series Cartridges

THE DYNAMIC STABILIZER

lrregular~ties of a warped record surface

combinat~on has a resonance at some

OTHER CARTRIDGE

I

CHANGING DISTANCE

I

I

I

rap~d

1

and decreases in tracking force and tracking angle. The results can
be signal wow groove skipping, cartridge bottoming or even am­plifier or

remedies warp and resonance effects by raising the resonance fre­quency above the warp frequency range and by maintaining a con­stant distance from the arm to the record surface. The cartridge
achieves its full potential trackability despite warped records.

speaier overioad. The viscous-damped Dyna.mic Stabilizer

TURNTABLE

i

-..-..-a-n

CONSTANT DISTANCE

I

-

-

1

FREQUENCY IN HERTZ

TYC

.Ail7

ECmICC

Typical Tone Arm-Cartridge Characteristics

Its conductive fibers ground the static charges on the record sur-

Because the static is excluded from the amplifier and speak-

face.
ers static-caused clicks and pops are eliminated. In addition, the
con'ductive fibers prevent static charges, either on the record or
on the turntable dustcover, from attracting or repelling the arm.
The arm-to-record distance, the tracking angle, and the tracking
force remain constant; and full tracking ability of
retained.

the cartridge is

The Dynamic Stabilizer in its entirety acts like a shock absorber. If
the arm is accidentally dropped on a record, the Stabilizer contacts
the record surface first. The Stabilizer cushions the impact and
prevents the stylus from bouncing across the record. Both the rec­ord and the stylus are protected against damage.

4

DISCHARGED

-

1

Its groove-contact fibers are able to reach down into the groove
and sweep away interfering dust and grit. The Dynamic Stabilizer
contains more than 10,000 individual fibers with an average di­ameter of
before the stylus reaches it, the stylus tracks the groove and not
the dust.

RECORD

7.6&

(.0003 in.) each. Because the groove is swept clean

1

CARTRIDGE WITHOUT DYNAMIC STABILIZER BOUNCES ACROSS RECORD

WlTH PROBABILITY OF RECORD AND STYLUS DAMAGE

SURFACE

CARTRIDGE

WlTH DYNAMIC STAB1

BOUNCING-LOW PROBABILITY OF RECORD OR STYLUS DAMAGE

It improves the ruggedness of the stylus moving system without
increasing its effective mass. Its rigidity helps improve mid- and
high-frequency trackability.

THE TELESCOPED SHANK

HIGH ENERGY

. .

-. . . - .

TELESCOPED

SHANK

WHAT THEY DO:

"1

The consequence of the ERA IV features in the M97 Series Cart­ridges is
tact with both groove walls-under real world conditions of warped
and dusty records with static charges on
ERA
reproduced, not only in a controlled laboratory environment, but
also in the average home; not only with state-of-the-art tone arms,
but also with average-to-high-end home equipment.

ADDED UNPRECEDENTED PROTECTION:

Stylus damage most commonly occurs when the stylus is pushed
sideways and bent, for example when the cartridge is accidentally

and irreparable. To help prevent this, all the M97 Series cartridges
feature a remarkable lateral
GUARD. The SIDE-GUARD responds to side thrusts on the stylus
by withdrawing the entire shank and tip safely into the stylus

housing before it can bend.

high

trackability-the ability of the stylus to stay in con-

IV Cartridges, all the music cut in the grooves is accurately

THE UNIQUE SIDE-GUARD STYLUS DEFLECTOR

aga~nst the edge of a record. The damage

bumped

CHOICE OF TIP GEOMETRY

the~r surfaces. With these

IS

instantaneous

deflect~on assembly called the SIDE-

Arrows show

Front view of SIDE-GUARD deflection
assembly and stylus

SIDE-GUARD DEFLECTION ASSEMBLY

direction

of stylus subjected to sudden lateral motion.

STYLUS SHANK
STYLUS TIP

WHAT MODELS ARE AVAILABLE:

FOR ULTRA-LIGHT TRACKING FORCES

M97HE with distortion-reducing hyperelliptical nude diamond

tip

M97ED with biradial (elliptical) nude diamond tip,

(.0002 x ,0007 in.)

M97GD with spherical nude diamond tip, 15s (.0006 in.)

FOR LIGHT TRACKING FORCES

M97EJ with biradial (elliptical) diamond tip, 10 x 18p (.0004 x

,0007 in.)

M97B with spher~cal diamond tip, 15p (.0006 in.)

FOR 78 RPM RECORDS AND LIGHT TRACKING FORCES

3

grams)

N978E stylus with biradial (elliptical) diamond tip,

(.0005 x ,0025 in.), for any of the above cartridges

(314

(1% to 3 grams)

4Y

to 11/2 grams)

13

5

x

(1%

x 636

18fi

to

STYLUS REMOVAL AND REPLACEMENT

ELECTRICAL CONNECTIONS

1

FIGURE

IMPORTANT: Always remove the stylus before making connections
or mounting the cartridge. The cartridge's Dynamic Stabilizer
should be in the guard" position throughout. Exercise care
your fingers don't slip and damage the stylus tip or shank.

SO

LEFT CHANNEL

WHITE

LEFT CHANNEL

GROUND

BLUE RIGHT CHANNEL

Connect the cartridge as shown. In many tone arms, lead wiring is

color coded and matches this cartridge's color coded terminals.

-_

-

.

RIGHT CHANNEL

RED

GROUND

GREEN

FIGURE

2

MOUNTING

Mounting centers are standard

is provided. Refer to the tone arm manual for specific details, such
as the need for spacers.
The two basic mounting methods are:

1.

Mounting the cartridge in a tone arm shell that has unthreaded
clearance holes.

2.

Mounting the cartridge in a tone arm shell that has threaded
mounting holes.

Use the

thin plastic retainer provided in the hardware pack in both
methods. The retainer holds the screws in place either on the shell
(method

1)

or on the cartridge (method

9

:=-

-.

-:&

.

<

,.,,*,

12.7

mm

(1/2").

Mounting hardware

2).

SCREWS

-

8

WE

..

..

.

..A.

ARM

HOLES

SMELL

NG.

IN

"OLE5

CLLIRlNCE

-

TONE

SPACERS

-

,IF

NLCESSA*",

IMPORTANT: When using method
will hold the cartridge securely. The screws should not extend
through the mounting plate and beyond the window in the mounting
block. See Figure

4.

CORRECT SCREW LENGTH INCORRECT SCREW LENGTH

FIGURE

.

.

...

1,

select the shortest screws that

4

TH'IEIDFO

"OLE5

ARM

PETINNER

ONTO

NECESSARY

SHELL

IClEWS

iN

TONE

PLA57C

PUSH

SPACERS IF

CARTRIDGE MOUNTING, METHOD

FIGURE

3

1

CARTRIDGE MOUNTING, METHOD

FIGURE

5

2