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Power Requirements

This microphone requires phantom power and performs best with a 48 Vdc supply 
(IEC-61938). However, it will operate with slightly decreased headroom and sensitivity 
with supplies as low as 11 Vdc. 

Most modern mixers provide phantom power. You must use a 

balanced

 microphone 

cable: XLR-to-XLR or XLR-to-TRS. 

SPECIFICATIONS

Accessories and Parts

Furnished Accessories

Cardioid Cartridge

RPM98A/C

Replacement Parts

Optional Accessories

Zippered Carrying Bag

95A2314

7.6 m (25 ft.) Cable

C25E

CERTIFICATION 

Eligible to bear CE Marking. Conforms to European EMC Directive 2004/108/EC. 
Meets Harmonized Standards EN55103-1:1996 and EN55103-2:1996, for residential 
(E1) and light industrial (E2) environments.

The Declaration of Conformity can be obtained from:

Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Wannenacker Str. 28
D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: [email protected]

Load Impedance

Maximum SPL capability, output clipping level, and dynamic range vary with the in-
put load impedance of the preamplifier to which you connect the microphone. Shure 

recommends a minimum input load impedance of 1000 Ω. Most modern microphone 

preamplifiers meet this requirement. Higher impedance results in better performance 
for these specifications.

Cartridge Type

Electret Condenser

Polar Pattern

Half-cardioid (cardioid in hemisphere above mount-
ing surface)

Frequency Response

20 to 20,000 Hz

Output Impedance

@ 1 kHz

146 Ω

Sensitivity

open circuit voltage, @ 1 kHz, typical

–48.5  dBV/Pa

[1]

 (3.8 mV)

Maximum SPL

1 kHz at 1% THD

[2]

2500 Ω load

155 dB

1000 Ω load

151 dB

Signal-to-Noise Ratio

[3]

64.5 dB

Dynamic Range

@ 1 kHz

2500 Ω load

125.5 dB

1000 Ω load

121.5 dB

Clipping Level

20 Hz to 20 kHz, 1% THD

2500 Ω load

12.5  dBV

1000 Ω load

7.5  dBV

Self Noise

equivalent SPL, A-weighted, typical

29.5 dB SPL-A

Common Mode Rejection

20 Hz to 200 kHz

≥55 dB

Frequency Contour Switch

7 dB of attenuation centered at 400 kHz

Connector

Three-pin professional audio (XLR), male, balanced

Polarity

Positive pressure on diaphragm produces positive 
voltage on pin 2 with respect to pin 3

Power Requirements

11–52 V DC

[4]

 phantom power (IEC-61938), 5.4 mA

Net Weight

470 g (16.6 oz.)

[1]

 1 Pa=94 dB SPL

[2]

THD of microphone preamplifier when applied input signal level is equivalent to cartridge output 

at specified SPL

[3]

S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted

[4]

All specifications measured with a 48 Vdc phantom power supply. The microphone operates at 

lower voltages, but with slightly decreased headroom and sensitivity. 

4

Содержание BETA 91A

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Страница 2: ...2...

Страница 3: ...the attack and clarity of bass heavy instruments General Rules for Use Aim the microphone toward the desired sound source angle unwanted sounds toward its null point Use the fewest amount of micropho...

Страница 4: ...of 1000 Most modern microphone preamplifiers meet this requirement Higher impedance results in better performance for these specifications Cartridge Type Electret Condenser Polar Pattern Half cardioi...

Страница 5: ...iliser ce filtre pour am liorer l attaque et la clart des instruments riches en graves R gles g n rales d utilisation Diriger le microphone vers la source sonore d sir e orienter les sources sonores i...

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Страница 8: ...00 Die meisten modernen Mikrofonvorverst rker erf llen diese Anforderung H here Impedanzen ergeben bessere Leistung f r diese Spezifikationen Kapseltyp Elektret Kondensator Richtcharakteristik Halbnie...

Страница 9: ...erata rivolgete i suoni indesiderati verso il rispettivo punto zero Usate il minimo numero di microfoni possibile per aumentare il PAG Guadagno Acustico Potenziale e prevenire il feedback Seguite la r...

Страница 10: ...moderni soddisfa tale requisito Con questi dati tecnici una maggiore impedenza im plica prestazioni migliori Tipo di capsula Condensatore a elettrete Diagramma polare Semicardioide cardioide nella se...

Страница 11: ...icionales Use este filtro para mejorar la sensibilidad y clari dad de los instrumentos de sonidos graves intensos Reglas generales de uso Apunte el micr fono hacia la fuente sonora deseada desv e los...

Страница 12: ...e requisito La impedancia m s alta da como resultado un mejor desempe o para estas especificaciones Tipo de c psula Condensador de electreto Patr n polar Semicardioide cardioide en el hemisferio super...

Страница 13: ...Shure Beta 91A XLR Beta 91A punch SPL Shure SPL XLR 60 60 punch EQ EQ 25 152 25 152 punch Beta 91A 13...

Страница 14: ...20 200 55 7 400 XLR 2 3 11 52 4 IEC 61938 5 4 Macca 470 16 6 1 1 Pa 94 dB SPL 2 THD 3 94 4 48 95A2314 7 6 C25E CE 2004 108 EEC EN55103 1 1996 EN55103 2 1996 E1 E2 Shure Europe GmbH Headquarters Europe...

Страница 15: ...Shure Beta 91A XLR Beta 91A SPL Shure SPL 2 XLR SPL 60 2 3 1 3 60 EQ EQ Beta 91A 25 152 mm 25 152 mm 15...

Страница 16: ...12 5 dBV 1000 7 5 dBV SPL A 29 5 dB SPL A 20 Hz 200 kHz 55dB 7 dB 400 kHz 3 XLR 3 2 11 52 V DC 4 IEC 61938 5 4 mA 470 g 16 6 1 1 Pa 94 dB SPL 2 THD SPL 3 S N 94dB SPL SPL A 4 DC48 V 95A2314 7 6 m C25E...

Страница 17: ...Shure Beta 91A XLR Beta 91A SPL Shure off axis SPL 2 Contour Switch XLR SPL 60 Contour Switch 2 3 3 to 1 60 EQ EQ Beta 91A 25 152 mm 1 6 in Contour Switch 25 152 mm 1 6 17...

Страница 18: ...29 5 dB SPL A CMR Common Mode Rejection 20 Hz to 200 kHz 55 dB 400 kHz 7 dB 3 XLR 2 3 11 52 V DC 4 IEC 61938 5 4 mA 470 g 16 6 oz 1 1 Pa 94 dB SPL 2 THD SPL 3 94 dB SPL equivalent SPL A weighted 4 48...

Страница 19: ...Shure Beta 91A XLR SPL Beta 91A Shure SPL XLR SPL 60 3 1 60 EQ EQ Beta 91A 25 152 1 6 25 152 1 6 19...

Страница 20: ...5 20 200 55 dB 400 7 XLR 2 3 11 52 V DC 4 IEC 61938 5 4 mA 470 16 6 1 1 Pa 94 dB SPL 2 3 94 dB A 4 48 95A2314 7 6 25 C25E CE EMC 2004 108 EC Harmonized EN55103 1 1996 EN55103 2 1996 E1 E2 Shure Europ...

Страница 21: ...50 100 9 8 7 6 5 4 3 2 9 8 7 6 5 4 3 2 10 0 10 Hz dB 20 20 EQ 61 cm 2 ft from sound source 150 120 150 120 180 30 60 90 30 60 0 90 10 dB 20 dB 15 dB 5 dB 150 120 150 120 180 30 60 90 30 60 0 90 10 dB...

Страница 22: ...22 Notes...

Страница 23: ...23 Notes...

Страница 24: ...4 Email info shure de Asia Pacific Shure Asia Limited 22 F 625 King s Road North Point Island East Hong Kong Phone 852 2893 4290 Fax 852 2893 4055 Email info shure com hk United States Canada Latin Am...

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