Description
SHURE BETA 91Ais a premium microphone that has been specially designed to capture the sound of percussion instruments, particularly the bass drum. If, as a drummer or sound engineer, you are concerned about capturing high-quality sound in the low-frequency spectrum, then the SHURE BETA 91A is the microphone for you! The SHURE BETA 91A bass drum microphone is designed specifically for capturing high-quality low-frequency sound, which includes all types of bass drums.
Microphone Features
Beta 91A is able to express the kick drum clearly and qualitatively, and not let it get lost in the overall mix of the instruments. 
The manufacturer recommends using the microphone not only for concert performances and drumming, but confidently states that the SHURE BETA 91A bass microphone can be used quite well in a recording studio, which greatly expands the possibilities of its application, making this model almost indispensable for working with low-frequency sound. Unique features of the SHURE BETA 91A microphone.
– The frequency response of the microphone has been specially designed to capture the sound of bass instruments, cajon, and piano.
– The microphone is designed with an XLR connector, which makes it easy to install the microphone inside a bass drum.
– Studio-quality pickup performance, even at the highest sound pressure levels.
– Supercardioid directional pattern for high gain and suppression of unwanted noise.
– Durable steel mesh that protects the microphone capsule from unwanted damage.
– A special microphone mounting system that suppresses unwanted interference and minimizes the transmission of all kinds of mechanical noise and vibrations.
– The microphone can be used both in a live concert and in a recording studio.
– Pleasant and modern appearance, made in the legendary tradition of Shure quality.
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Features and sound characteristics of the Shure Beta 91A microphoneThe microphone can be used in any area where dynamic and high-quality sound pickup from low-frequency instruments and more is required. Specially developed for this model, the frequency response from 20 (Hz) to 20 (kHz) is designed to easily withstand daily heavy use. Thanks to its innovative and specially designed dynamics, the SHUR BETA 91A bass microphone sets a new standard for sound capture. 
Specifications of the SHURE BETA 91A bass drum microphone.
| Cartridge type | Electret capacitor | Semicardioid (cardioid in a hemisphere above the mounting surface) | 20 to 20,000 Hz | Output impedance146 ohms | Sensitivity-48.5 dBV/Pa[1] (3.8 mV) | Maximum sound pressure level (ultrasound) 1 kHz at a CNI of 1%[2] | Load 2500 Ohm 155 dB Load 1000 Ohms 151 dB | Signal-to-noise ratio[3]64.5 dB | Dynamic range at 1 kHz | Load 2500 Ohm 125.5 dB 1000 ohm load 121.5 dB | Clipping level 20 Hz to 20 kHz, 1% Jitter | Load 2500 ohms 12.5 dBV 1000 ohm load 7.5 dBV | Intrinsic noise equivalent to ultrasound, on a scale of A, typically | 29.5 dB ultrasound | Attenuation of in-phase signals 20 Hz to 200 kHz | ≥55 dB | Frequency bandwidth switchAttenuation 7 dB, centered at 400 kHz | Positive pressure on the membrane creates a positive voltage on pin 2 relative to pin 3 | 11-52 V DC[4] phantom power (IEC-61938), 5.4 mA |
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