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Microphones

Shure

BETA 91A

Key features

Weight
470 g
Connector
3-pin XLR, male
Power supply
11–52 V DC phantom power; specifications measured at 48 V DC

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Overview

A low-profile boundary microphone for a defined kick-drum attack and full low-frequency sound, also suitable for piano. The Shure BETA 91A has a half-cardioid pickup pattern above its mounting surface, an integrated preamplifier and a standard balanced XLR output.

For kick drum, place it inside the drum on a pillow or another cushioning surface and adjust the position to balance attack and resonance. The underside contour switch offers a flat response or a low-mid cut for a more pronounced kick-drum sound.

Connect it with a balanced XLR microphone cable to an input with phantom power; 48 V is recommended. This listing is for the microphone; cabling and other accessories are not automatically included.

Specifications

Model
BETA 91A
Weight
470 g

Audio

Transducer type
Electret condenser
Polar pattern
Half-cardioid above the mounting surface
Frequency response
20–20,000 Hz
Connector
3-pin XLR, male
Power supply
11–52 V DC phantom power; specifications measured at 48 V DC
Contour switch
Flat or low-mid cut (7 dB at 400 Hz)
Output impedance
150 Ω
Recommended input impedance
At least 1,000 Ω

Documentation