Shure 419A, 419B User Guide

222 HARTREY AVE.. EVANSTON.

MICROPHONES

AREA CODE 3121866-2200 - CABLE: SHUREMICRO TWX: 910-231-0048 TELEX: 72-4381

AND

ELECTRONIC

IL.

60204 U.S.A.

COMPONENTS

MODELS 419A AND 419B

CONTROLLED MAGNETIC@ NOISE-CANCELING COMMUNICATIONS MICROPHONES

The important characteristics contributing to noise cancellation and clear speech transmision in the Model 419 Series are shaped frequency response,

rectionality, and distance discrimination.

Shaped Frequency Response: The acoustical elements are arranged to optimize performance in the critical voice frequency range of 200 to 4,000 Hz. result is the reduction in pickup of sounds outside the desired frequency range and proper control of those sounds within the desired range.

Directionality: Through their inherent directional properties, the Model 419 Series reject sounds that do not originate from the front of the microphone. This reduces pickup of off-axis sounds extraneous to the user's voice.

The

Shure

TROLLED

MAGNETIC@

are designed

especially for use where surrounding

Model

GENERAL

419 series

RANGER

noise-canceling microphones

co~-

high noise levels make intelligible transmission a prob-

lem.

~h~

microp~ones

provide

clear,

crisp, natural by

Distance Discrimination: The Model 419 Series discriminate against sounds arriving from a distance in favor of sounds from a near source. The microphones Operate on the pressure gradient principle. Two sound

entry ports spaced a small distance apart produce,

means of phase cancellation, reduction of sensiti-

voice response in even the noisiest surroundings. vity all distant These small, rugged, hand-held CONTROLLED MAGNETlC microphones are available in two versions: the

high-impedance 419A and the low-impedance 419B.

The Model 419 Series noise-canceling microphones represent a significant improvement over most phones with anti-noise features. Noise cancellation

the 419 Series is provided through the combination of highly directional operation and superior discrimi-

nation against noise from distant sources over an

unusually wide frequency range. The 419 Series are equally well suited

where wind, traffic, and vibration, and

for mobile or fixed station

use

engine noise or machinery,

ventilation noise may interfere with

speech transmision.

With greater clarity and improved reliability and

In order to obtain the best noise-canceling

ance with the Model 419 Series, "close-talking" is required. The lips must be as close as possible to the microphone grille (directly facing the grille and pressed

against the rubber lip guard). nation between voice sounds and background noise,

do not hold the microphone more than from

the mouth.

No special precautions beyond ordinary care are

necessary in operating the Model 419A and 419B. They will function very satisfactorily under most conditions of humidity and temperature. Dropping the microphone or other similar severe mechanical shocks should be

avoided.

durability, the microphones are available as either the 419A for connection to high-impedance microphone inputs or the 4198 for connection to low-impedance

The internal connections of Models 419A and

are shown in ~i~~~~

microphone inputs.

The 419 Series microphones fit naturally and comfortably in the hand, and are not affected by heat or humidity. The exclusive

ARMO-DUR@ case is immune

to oil, grease, fumes, salt spray, sun, rust, and cor-

rosion-and is outstanding in its ability to resist me-

chanical shocks and vibration. The "Million-Cycle"

leaf-type switch is designed to withstand rigorous operating conditions and constant use.

Microphone Features: FIGURE

Highly intelligible speech response In both models, the RED and BLACK cable leads Extremely effective noise cancellation

control an external relay or switching circuit. Available as either high-impedance or low-imped- In the high-impedance Model 419A, the WHITE ance model

cable lead is the "hot" conductor for the audio input Sturdy and reliable CONTROLLED MAGNETIC circuit; the shield is connected to the amplifier or cartridge chassis ground.

Unparalleled ruggedness and durability

Tough ARMO-DUR case

In the low-impedance Model

WHITE leads are the "hot" conductors for connection Mounting bracket supplied-fits hang-up button to a balanced line audio input circuit; the shield is on back of microphone

connected to the amplifier or chassis ground.

NOISE CANCELLATION

OPERATION

CONNECTIONS

WHITE

----. .

MODEL

419~

INTERNAL

F~~

greatest discrimi-

CONNECTIONS

MODEL

4198, the GREEN and

WHITE

4198

perform-

(1 in,)

4198

T-

,L~-

The

di-

27A306

(TB)

1980,

Shure

Brothers

Inc.

Printed

U.S.A.

SPECIFICATIONS

TY pe

CONTROLLED MAGNETIC@, Noise-Canceling

Frequency Response

Optimized response in the critical 200 to 4,000 Hz

range (see Figure 2)

110

-10

TYPICAL

Impedance

Model Model ohms (200 ohms actual)

Load Impedance Range

Model

Output Level (at 1,000 Hz)

Open Circuit Voltage*. Power Level*

Switch

Push-to-talk leaf-type switch to actuate microphone circuit and an external relay or switching circuit.

Cable

Model

conductor shielded, coiled cable Model

conductors shielded, coiled cable

Case

Matte black

Dimensions

See Figure

419A: Microphone impedance is "High" 419B: Microphone rating impedance is 150

419A: 15 kilohms to 100 kilohms 4198: 200 ohms to 1,000 ohms

*O dB = 1 volt per 100 microbars

**0 dB

419A: 1.5m (5 ft) three-conductor, one419B: 1.5m (5 ft) four-conductor, two-

ARMO-DUR@

FREUXNCY

FREQUENCY RESPONSE

FIGURE

...........

1 milliwatt per 10 microbars

lpO0

HERTZ

9A 41 9B

....

-18.5 dB

(.I19 V) (9.44 mV)

59.5 dB

-40.5 dB

Net Weight

260 grams (9 oz)

Packaged Weight

401 grams (14 oz)

MOUNTING

A mounting bracket for permanent installation is

supplied with each microphone (see Figure 4).

MOUNTING

FURNISHED ACCESSORY

Mounting Bracket

Cartridge Cable

Case Switch Switch Button

This be free from electrical and mechanical defects for a period of one year from date of purchase. Please

retain proof of purchase date. This guarantee includes all parts and labor. This guarantee is in lieu of any and all other guarantees or warranties, express or implied, and there shall be no recovery for any consequential or incidental damages.

...................

.......................

......................

Shure product is guaranteed in normal use to

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REPLACEMENT PARTS

...............

GUARANTEE

BRACKET

FIGURE

9A 41 9B

41 90A1756 R19B

C24C C25C

RK19C

90B1008 RK15S

RK16SB

RK6MB

RK20C

RKI6SB

SHIPPING INSTRUCTIONS

Carefully repack the unit and return it prepaid to:

Shure Brothers Incorporated Attention: 1501 West Shure Drive

13/4

9.0mm

OVERALL

FIGURE

IN.)

DIMENSIONS

If outside the United States, return the unit to your

dealer or Authorized Shure

The unit will be returned to you prepaid.

Arlington Heights, Illinois 60004

Service Department

Service Center for repair.