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Shure Beta 91A Boundary Microphone

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User Manual for Shure Beta 91A Boundary Microphone

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Shure Beta 91A Boundary Microphone Contents of the user manual for the Shure Beta 91A Boundary Microphone
  • Product category: Instrument Microphones Shure
  • Brand: Shure
  • Description and content of package
  • Technical information and basic settings
  • Frequently asked questions – FAQ
  • Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
  • Authorized service for Shure Instrument Microphones

Shure Beta 91A Boundary Microphone Shure Beta 91A Boundary Microphone Shure Beta 91A Boundary Microphone
User manual for the Shure Beta 91A Boundary Microphone contain basic instructions that need to be followed during installation and operation. Before starting your appliance, the user manual should be read through carefully. Follow all the safety instructions and warnings, and be guided by the given recommendations. User manual is an integral part of any Shure product, and if it is sold or transferred, they should be handed over jointly with the product. Following the instructions for use is an essential prerequisite for protecting health and property during use, as well as recognition of liability on the part of the manufacturer for possible defects should you make a warranty claim. Download an official Shure user manual in which you will find instructions on how to install, use, maintain and service your product.

And do not forget – unsuitable use of a Shure product will considerably shorten its lifespan!



Product description

The Shure Beta 91A is a boundary microphone that can double as a kick drum mic, as it can capture the punch and attack of low-frequency instruments such as kick (bass) drums. It features a wide frequency response well suited for capturing a variety of audio signals such as organ and piano. The flat, boundary design also aides in producing a strong, solid low-end response, as well as make it easy to mount inside of a bass drum. The Beta 91A is ideal for both recording and sound reinforcement alike.
  • Uniform half-cardioid polar pattern for maximum gain-before-feedback and rejection of off-axis sound
  • Low-profile design features integrated preamplifier and XLR connector to facilitate setup efficiency while minimizing stage clutter
  • Frequency response tailored for kick drum/low frequency applications with a wide dynamic range for use in high SPL environments
  • Two-position contour switch to maximize attack and clarity depending on application: select the flat response setting for natural sound in most applications or the Low-Mid Scoop setting for a strong low frequency punch with plenty of higher frequency attack
  • Furnished with zipper pouch
UPC: 042406187176 In the Box Shure Beta 91A Boundary Microphone
  • Zippered Carrying Bag
  • Limited 1-Year Warranty
  • User Manual PDF 2.4mb Table of Contents




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    Technical parameters

    Shure Beta 91A Specs

    Transducer Condenser (electret bias)
    Polar Pattern Half-cardioid
    Frequency Response 20 to 20,000 Hz
    Output Impedance 146 Ohms
    Sensitivity -48.5 dBV/Pa (3.8 mV)
    Maximum SPL 2500-Ohm load: 155 dB (1 kHz at 1% THD)
    1000-Ohm load: 151 dB (1 kHz at 1% THD)
    Maximum Input Sound Level 20 Hz to 20 kHz, less than 1% THD
    Signal-to-Noise Ratio 64.5 dB
    Dynamic Range 2500-Ohm load: 125.5 dB (1 kHz at 1% THD)
    1000-Ohm load: 121.5 dB (1 kHz at 1% THD)
    Clipping Level 2500-Ohm load: 12.5 dBV
    1000-Ohm load: 7.5 dBV
    Self Noise (Equivalent SPL) 29.5 dB SPL (A-weighted)
    Common Mode Rejection ≥55 dB (20 Hz to 200 kHz)
    Switch Frequency Contour Switch: 7 dB of attenuation centered at 400 kHz
    Power Requirements Phantom Power: 48 VDC +/- 4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and 3
    Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
    Power Requirements 11 to 52 VDC phantom power, 5.4 mA
    Output Connectors 1 x XLR male, balanced
    Dimensions 3.7 x 5.5 x 0.8" (95.1 x 139.1 x 20.3 mm)
    Weight 16.6 oz (470 g)
    Package Weight 1.85 lb
    Box Dimensions (LxWxH) 10.0 x 5.0 x 3.4"

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