Shure SM81 Uživatelský manuál stáhnout pdf

MODEL SM81

UNIDIRECTIONAL CONDENSER MICROPHONE

The Shure Model SM81 is a high-quality, unidirectional

condenser microphone designed for studio recording, broad-

casting, and sound reinforcement. Its wide frequency re-

sponse, low noise characteristics, and low RF susceptibility

have made it a standard for applications involving acoustic in-

struments, especially guitar, piano, and cymbals.

The SM81 is ruggedly constructed. It operates on phantom

power and performs over a wide range of temperatures and hu-

midity conditions. It is furnished with a swivel adapter, attenua-

tor-switch lock, foam windscreen, and case for carrying and

storage. Other accessories are available.

Model SM81 Features

• 20 Hz to 20 kHz frequency response

• Flat response curve for accurate reproduction of sound

sources

• Low noise and high output clipping level

• Low distortion over a wide range of load impedances

• Cardioid polar pattern, uniform with frequency and symme-

tric about axis, providing maximum rejection and minimum

coloration of off-axis sounds

• Low RF susceptibility

• Selectable low-frequency response: flat, 6 or 18 dB/octave

rolloff

• 0 dB/10 dB lockable attenuator switch

• Phantom powering (DIN 45 596 voltages of 12 to 48 Vdc)

• Rugged steel construction for durability

• Field-usable over wide range of temperature and humidity

conditions

SPECIFICATIONS

Type

Condenser (electret bias)

Frequency Response

20 to 20,000 Hz (see Figure 1)

20 200001000

10000

50 100

98765432

+10

–10

1 METER

TYPICAL FREQUENCY RESPONSE

FIGURE 1

Polar Pattern

Cardioid (unidirectional) response—uniform with

frequency, symmetrical about axis (see Figure 2)

150

120

150

120

180

–5 dB

–10 dB

–15 dB

–20 dB

500 kHz

100 Hz

1 kHz

150

120

150

120

180

–5 dB

–10 dB

–15 dB

–20 dB

2 kHz

5 kHz

10 kHz

TYPICAL POLAR PATTERNS

FIGURE 2

Output Impedance

Rated at 150 Ω (85 Ω actual)

Recommended minimum load impedance: 800 Ω (May

be used with loads as low as 150 Ω with reduced clip-

ping level)

Output Configuration and Connector

Balanced, transformer-coupled output; male XLR con-

nector

Sensitivity (at 1,000 Hz)

Open Circuit Voltage –45 dBV/Pascal (5.6 mV). . . . . . .

(1 Pascal = 94 dB SPL)

Clipping Level (at 1,000 Hz)

800 Ω Load –4 dBV (0.63 V). . . . . . . . . . . . . . . . . . . . . . .

150 Ω Load –15 dBV (0.18 V). . . . . . . . . . . . . . . . . . . . . .

Total Harmonic Distortion

Less than 0.5% (131 dB SPL at 250 Hz into 800 Ω load)

Model SM81 User Guide

27B2916 (BJ)

E2002, Shure Incorporated

Printed in U.S.A.

1 2 3 4 5 6 ... 19 20

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Strany 1 - Model SM81 User Guide

MODEL SM81UNIDIRECTIONAL CONDENSER MICROPHONEThe Shure Model SM81 is a high-quality, unidirectionalcondenser microphone designed for studio recording,

Strany 2 - FIGURE 3

10Kapselkapazität54 pFStellungen des Baßfrequenzgang–Schalters (Hoch-paßfilter)Linearer Frequenzgang, –6 dB/Oktave unterhalb 100 Hz, –18 dB/Oktave unt

Strany 3 - Wind Noise

1120 100050 100+100–10HzdB152.4 MM ( )152.4 MM ( )152.4 MM ( )NAHBESPRECHEFFEKT UND KOMPENSIERUNGABBILDUNG 4DämpfungsschalterDas SM81 verfü

Strany 4

12SYMMETRISCHERTRANSFORMATORKONDENSATOR-KAPSELFET–IMPEDAN-ZWANDLERKLASSE AMEHRFACH–VERSTÄRKERBASS–FREQUENZ-GANG–FILTER/HOCHPAßFILTERHF–STÖRUNGS–FILTER

Strany 5 - CARACTÉRISTIQUES

13MODELO SM81MICROFONO DE CONDENSADOR UNIDIREC-CIONALEl modelo SM81 de Shure es un micrófono de condensa-dor unidireccional de alta calidad diseñado p

Strany 6 - UTILISATION

14Protección contra inversión de polaridad 200 mA máx.(limitado por diodo)PolaridadUna presión positiva sobre el diafragma produce unvoltaje positivo

Strany 7 - DESCRIPTION DU CIRCUIT

1520 100050 100+100–10HzdB152.4 MM ( )152.4 MM ( )152.4 MM ( )EFECTO DE PROXIMIDAD Y COMPENSACIONFIGURA 4Interruptor atenuadorEl SM81 tiene

Strany 8

16TRANSFORMADOREQUILIBRADORCAPSULA DECONDENSADORCONVERTIDORDE IMPEDANCIAPOR FETAMPLIFICADORCOMPUESTOCLASE AFILTRO DE RES-PUESTA DE BAJAFREC.FILTRO DER

Strany 9 - TECHNISCHE DATEN

17MODELLO SM81MICROFONO A CONDENSATORE UNIDIREZIO-NALEIl modello Shure SM81 è un microfono unidirezionale acondensatore, di alta qualità, studiato per

Strany 10

18Protezione contro inversioni di polarità 200 mA max.. . (mediante diodo)PolaritàUna pressione sonora positiva sul diaframma produceuna tensione pos

Strany 11 - 6 darge

1920 100050 100+100–10HzdB152.4 MM ( )152.4 MM ( )152.4 MM ( )EFFETTO DI PROSSIMITÀ E COMPENSAZIONEFIGURA 4Interruttore dell’attenuatoreL’S

Strany 12

2Maximum SPL (at 1,000 Hz)800 Ω load 136 dB (attenuator at 0). . . . . . . . . . . . . . . . 146 dB (attenuator at –10)150 Ω load 128 dB (attenuator a

Strany 13 - ESPECIFICACIONES

20TRASFORMATOREBILANCIATOCAPSULA CONDENSATORETRASFORMATORED’IMPEDENZA A FETAMPLIFICATOREMISTO DI CLASSE AFILTRO DI RISPO-STA A BASSAFREQUENZAFILTRO CO

Strany 14 - Alimentación

3Low-Frequency Response FilterThe SM81 has a three-position low-frequency response fil-ter controlled by a switch located on its handle. The switch is

Strany 15 - DESCRIPCION DEL CIRCUITO

4CIRCUIT DESCRIPTIONA block diagram of the SM81 is shown in Figure 6. The ca-pacitor cartridge is followed by a switch-controlled capacitiveattenuator

Strany 16 - ACCESORIOS SUMINISTRADOS

5MODÈLE SM81MICROPHONE ÉLECTROSTATIQUE UNIDIREC-TIONNELLe modèle SM81 de Shure est un microphone élec-trostatique unidirectionnel de haute qualité, co

Strany 17 - DATI TECNICI

6PolaritéUne pression positive sur le diaphragme produit une ten-sion positive sur la broche 2 par rapport à la broche 3Capacité de la capsule54 pFPos

Strany 18 - FUNZIONAMENTO

720 100050 100+100–10HzdB152.4 MM ( )152.4 MM ( )152.4 MM ( )EFFET DE PROXIMITÉ ET COMPENSATIONFIGURE 4Sélecteur d’atténuationLe modèle SM8

Strany 19 - DESCRIZIONE DEL CIRCUITO

8 TRANSFORMATEUR-SYMÉTRIQUECONVERTISSEURIMPÉDANCE FETFILTRE RÉPONSE BFAMPLIFICATEUR COMBINÉ CLASSE ACAPSULE ÀCONDENSATEURRÉGULATEUR/PRO-TECT. INVERS.P

Strany 20 - PARTI DI RICAMBIO

9MODELL SM81GERICHTETES KONDENSATORMIKROFONDas Shure–Modell SM81 ist ein qualitativ hochwertigesgerichtetes Kondensatormikrofon, das für Tonstudioaufn

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