Shure ML140HE Bedienungsanleitung

SPECIFICATIONS

Frequency Response

20 to 22,000 Hz

Output (at

1,000

Hz)

4.0 rnV per channel at 5 cmlsec peak recorded

velocity

Inductance

360 rnH

Dc Resistance

1,000 ohms

Optimum Load

47,000 ohms, 200 to 300 pF, includingtone arm wir-

ing and amplifier input circuitry

Channel Separation (minimum)

25 dB at 1 kHz, 15 dB at 10 kHz

Channel Balance

Within 2 dB

Tracking Force

Force at Stylus Total Tone Arm

Tip Setting

Optimum 1.0 gram 1.5 grams

Maximum 1.25 grams

1.75

grams

Force Exerted by Dynamic Stabilizer

0.5 grams

Typical Trackability (at 1 gram, in cmlsec peak

velocity) 400 Hz

29 cmlsec

1,000 Hz

42 cmlsec

5,000 Hz

60 cmlsec

10,000 Hz

50 cmlsec

Net Weight

4.5 grams

Replacement Stylus

NIIOHE, nude MASARTM-polishedhyperelliptical

diamond tip, 5

3Bp (.0002 x ,0015 in.),

MICROWALUBeTMberyllium shank

BIFOLD-PARAFLUX Coil Core

Interlocking

The

cartridge body

of the

ML140HE

contains

an abundance of new functional electrical

featuresfor highoutput with maximumfidelity.

The BIFOLD-PARAFLUX coil-core has

prealigned two-layer folded pole pieces

with parallel flux laminations to provide

greater efficiency of energy transfer and

maximumchannel separation. The result is

superb stereo imaging and depth.

The architecture of the internal frame in-

terlocks to produce a completely rigid,

nonresonant substructure. The cartridge

body will never wear out or cause deteriora-

tion of the sound.

The true humbucking coil configuration

results in maximum hum cancellation.

The noncorroding gold-plated terminal pins

ensure continuity of the signal path.

The Dynamic Stabilizer has been newly design-

ed to maintain the traditionally distinguished

Shure effectiveness in overcoming real-world

warp, static, and dust obstructions to record-

playing accuracy.

The Stabilizer's viscous-damping reduces

warp and tone arm resonance effects to in-

significance. The newly designed miniature

pivot system acts like a shock absorber to

prevent groove skipping, mistracking, and

distortion caused by record warps.

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ML140HE

The electrically conductive Stabilizer fibers

remove static charges from the record sur-

face and conduct them to ground to

eliminate static charge noise and minimize

the attraction of dust tothe record surface.

More than

10,000

tiny fibers in each

Stabilizer reach down into the groove to

sweep away interfering and abrasive dust

and grit. Records stay cleaner and noise

free longer.

Functioning like a shock absorber, the

Stabilizer protects the stylus from damage

if it isaccidentally dropped on the record.

The unique Shure

SIDE-GUARD

protects the

stylus from accidental damage caused by im-

pacts from the side, such as when the tone

arm slides across the record.

The elements

the stylus

have been

meticulously optimized for low effective mass,

continuity of groove contact, and accurate

duplication of intricate groove modulations.

The result is a cartridge with excellent sound

clarity that enhances the enjoyment of listen-

ing to records. Three features of the design

provide this exceptional performance.

The ultra-thin wall beryllium shank

com-

bines an ideal configuration with an ideal

material. Beryllium is extremely light, yet

highly rigid. Shure has developed a unique

fabrication method, called MICRO-

WALLIBeTM,that forms the shank into a

thin-wall tube of 13p-thick

(.0005

inches)

beryllium. This yields the highest ratio of

stiffness to density of various attainable

shank materials and configurations. We

call this ratio the Shank Performance Ratio

(SPR); higher numbers mean improved per-

formance, especially in high-frequency

trackability. To the listener it means that

the onset of complex difficult-to-play

sounds, such as trumpets, pianos, female

vocalists, and full orchestras, will sound

truer and will be cleanly reproduced.

Below are shown various possible beryllium

shank structures, and the SPR of each.

MlCROWALLlBe is clearly superior.

BERYLLIUM SHANKS:

SHANK PERFORMANCE RATIOS

Solid Rod:

Thick

Wall Tube: MICROWALLIBeTM

mil dla.

mll wall;

0.5

mil wall;

12 m~ldia.

mil d~a.

1.00 SPR* 2.06 SPR* 6.25 SPR'

'SPR: Stiffnessldenslty relative to

mll diameter solid

rod

The hyperelliptical tip geometry has an op-

timized tip-groove contact area that

dramatically reduces both harmonic and in-

terrnodulation distortion. The result is

crisp, precise sound throughout the entire

record.

ELLIPTICAL HYPERELLIPTICAL

TIP SHAPES

rmn

2nd harmonic dlstortlon, average both channels

3.7

kHz, 31 cmlsec peak recorded veloclty

99%

dlsiortlon, average both channels

1 kHzll.5

kHz,

15 cmlsec peak recorded velocity

6mll 2xim81 Zx15m11

Sphei8cai

Elllplical Hy~erell8~f8cal

The ~?i~~~~~-~olishedcontact areas

of the

tip decrease groove abrasion. Records last

longer and stay quieter.

NOISE BAND WIDTH: 500Hz

kHz

MEDIUM: LACQUER MASTER

LACQUER GROUP

PLAYED

UNWORN

CONVENTIONAL

STYLUS

LACQUER GROUP

PLAYED

UNWORN

MESAR

STYLUS

1234567891011

NUMBER OF PLAYS

FREQUENCY RESPONSE, TRACKABILITY,

AND HIGH FIDELITY

Performance is the ultimate test of success

for any cartridge design.

Frequency response

and

trackability

specifications are two of the

most important indicators of successful high-

fidelity performance.

Frequency response

demonstrates the ac-

curacy of reproduction of tones across the en-

tire audible spectrum.

flat frequency

response displays a cartridge's ability to

reproduce

all

sounds without emphasis or at-

tenuation. The tonal balance of low, mid, and

high pitchedsounds are reproduced exactly as

they were recorded.

Trackability

measures the ability of a stylus,

at a given tracking force, to maintain contact

with both groove walls while negotiating the

tortuouspeaks, valleys, andhairpinturns of to-

day's heavily modulated record groove.

car-

tridge must allow the stylus tip to stay in firm

contact with the groove walls to produce clear,

clean, undistorted sound, and to prevent

record groove damage that permanently alters

and distorts the sound.

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