Video Chat with a Pro Audio Expert - Live

Shure Beta 91A Boundary Microphone

BH #SHBETA91A • MFR #BETA 91A
Print
Shure Beta 91A Boundary Microphone
Key Features
  • Wide Frequency Response
  • Low-Profile Design
  • Cardioid Polar Pattern
  • Interchangeable Cartridge
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.
More Details
In Stock
No Store Display
Free 2-Day Shipping
Protect Your Gear
Add a protection plan from $42.99
Ask an Expert
866-842-7675

Shure Beta 91A Overview

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

Shure Beta 91A Specs

Key Specs
Microphone Type
Boundary
Polar Pattern
Half-Cardioid
Element Type
Electret Condenser
Controls
Low-Mid Cut
Frequency Response
20 Hz to 20 kHz
Maximum SPL
155 dB (1 kHz, 1% THD, 1-Kilohm Load)
151 dB (1 kHz, 1% THD, 2.5-Kilohm Load)
Analog Output
1x XLR 3-Pin
Power Sources
Phantom Power
Microphone
Microphone Type
Boundary
Polar Pattern
Half-Cardioid
Element Type
Electret Condenser
Sound Field
Mono
Orientation
N/A to Boundary Mics
Controls
Low-Mid Cut
Filter & EQ
Low Cut: -7 dB at 400 Hz
Circuitry
Solid-State
Performance
Frequency Response
20 Hz to 20 kHz
Maximum SPL
155 dB (1 kHz, 1% THD, 1-Kilohm Load)
151 dB (1 kHz, 1% THD, 2.5-Kilohm Load)
Sensitivity
3.8 mV/Pa / -48.5 dBV/Pa
Dynamic Range
125.5 dB (2500-Ohm Load, 1 kHz at 1% THD)
121.5 dB (1000-Ohm Load, 1 kHz at 1% THD)
Equivalent Noise Level
29.5 dB SPL (A-Weighted, Typical)
Connectivity
Analog Output Connector
1x XLR 3-Pin
Power
Power Sources
Phantom Power
Operating Voltage
11 to 52 V (Phantom Power)
Physical
Color
Blue / Gray
Mounting Thread Size
No Mount Included
Dimensions
H: 3.7 x W: 0.8 x L: 5.5" / H: 95.1 x W: 20.3 x L: 139.1 mm
Weight
16.6 oz / 470 g
Packaging Info
Package Weight
1.65 lb
Box Dimensions (LxWxH)
10 x 5 x 3.4"

Shure Beta 91A Reviews

Best piano mic ever!

By Robert
Rated 5 out of 5
Date: 2024-12-26

Been looking for a great piano pick-up for ages. FINALLY found this one and am loving it. It's one that can go INSIDE the piano. Amazing! Uses Phantom Power, by the way (good to know)

Thunder!

By gary_vineyard
Rated 5 out of 5
Date: 2015-02-25

This mic truly brings the Thunder to your kick performance (lightning not included, LOL)!

See any errors on this page?

Is the Beta91A manufactured in Mexico or China ?

Is the Beta91A manufactured in Mexico or China ?
Asked by: Nabil
The Shure Beta 91A Boundary Microphone is manufactured in Mexico.
Answered by: Lisa S
Date published: 2023-02-27

For grand piano, does this sound better with one ...

For grand piano, does this sound better with one or two Beta 91A microphones?
Asked by: Robert
One Shure Beta 91A Boundary Microphone is all you need to mic a grand piano.
Answered by: Lisa S
Date published: 2023-03-26
  • y_2026, m_6, d_5, h_14CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.46
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_2
  • loc_en_US, sid_740223, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo
Whatever You Need, We've Got It