BETA 91 A

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BETA 91A Specification

Cartridge Type                                      Electret Condenser

Polar Pattern                                         Half-cardioid (cardioid in hemisphereabove mounting surface)

 

Frequency Response                           20 to 20,000 Hz

 

Output Impedance                                               146 Ω

@ 1 kHz

 

Sensitivity                                              –48.5 dBV/Pa[1] (3.8 mV)

open circuit voltage, @ 1 kHz,

typical

 

Maximum SPL                                       2500 Ω load 155 dB1

kHz at 1% THD[2]                                                      1000 Ω load 151 dB

 

Signal-to-Noise Ratio[3]                                    64.5 dB

 

Dynamic Range                                    2500 Ω load 125.5 dB

@ 1 kHz                                                  1000 Ω load 121.5 dB

 

Clipping Level                                       2500 Ω load 12.5 dBV

20 Hz to 20 kHz, 1% THD                      1000 Ω load 7.5 dBV

 

Self Noise                                              29.5 dB SPL-A

equivalent SPL, A-weighted,

typical

 

Common Mode Rejection                   ≥55 dB

20 Hz to 200 kHz

 

Frequency Contour Switch                                 7 dB of attenuation centered at 400 kHz

 

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

 

Polarity                                                   Positive pressure on diaphragm producespositive voltage on pin 2 withrespect to pin 3

 

Power Requirements                           11–52 V DC[4] phantom power

(IEC-61938), 5.4 mA

 

Net Weight                                             470 g (16.6 oz.)