Shure SM81 Manual do Utilizador

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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
98765432
+10
0
–10
Hz
dB
1 METER
TYPICAL FREQUENCY RESPONSE
FIGURE 1
Polar Pattern
Cardioid (unidirectional) response—uniform with
frequency, symmetrical about axis (see Figure 2)
150
o
120
o
150
o
120
o
180
o
30
o
60
o
90
o
30
o
60
o
90
o
–5 dB
–10 dB
–15 dB
–20 dB
0
500 kHz
100 Hz
1 kHz
150
o
120
o
150
o
120
o
180
o
30
o
60
o
90
o
30
o
60
o
90
o
–5 dB
–10 dB
–15 dB
–20 dB
0
2 kHz
5 kHz
10 kHz
TYPICAL POLAR PATTERNS
FIGURE 2
Output Impedance
Rated at 150 (85 actual)
Recommended minimum load impedance: 800 (May
be used with loads as low as 150 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 Load –4 dBV (0.63 V). . . . . . . . . . . . . . . . . . . . . . .
150 Load –15 dBV (0.18 V). . . . . . . . . . . . . . . . . . . . . .
Total Harmonic Distortion
Less than 0.5% (131 dB SPL at 250 Hz into 800 load)
Model SM81 User Guide
27B2916 (BJ)
E2002, Shure Incorporated
Printed in U.S.A.
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Resumo do Conteúdo

Página 1 - Model SM81 User Guide

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

Página 2 - FIGURE 3

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

Página 3 - Wind Noise

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

Página 4

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

Página 5 - CARACTÉRISTIQUES

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

Página 6 - UTILISATION

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

Página 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

Página 8

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

Página 9 - TECHNISCHE DATEN

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

Página 10

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

Página 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

Página 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

Página 13 - ESPECIFICACIONES

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

Página 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

Página 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

Página 16 - ACCESORIOS SUMINISTRADOS

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

Página 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

Página 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

Página 19 - DESCRIZIONE DEL CIRCUITO

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

Página 20 - PARTI DI RICAMBIO

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

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