Shure BETA91A - Cardioid Kick Microphone - Dynamic and Precise
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The Authority of the "Kick": Why the Beta 91A is indispensable
The Shure Beta 91A solves the major problem of bass drum recording: the lack of clarity in the attack. Where traditional dynamic microphones can sound "muddy," the Beta 91A uses a high-resolution condenser capsule that captures the drummer's impact with surgical precision.
Its flat design allows it to be simply placed on a pillow or blanket inside the bass drum, eliminating the need for bulky mic stands that slip during the performance. Combined with a low-frequency mic (like the Beta 52A), it creates the perfect modern "kick sound": a sharp attack and a monumental sub-bass foundation.
Full Technical Specifications (Absolute Extraction)
| Category | Characteristic | Technical Details Beta 91A |
| Kind | Transducer | Capacitor electrostatic |
| Directivity | Polar Diagram | Semi-cardioid (Unidirectional) |
| Audio | Frequency response | 20 Hz - 20,000 Hz |
| Sensitivity | (at 1 kHz) | -48.5 dBV/Pa (3.8 mV) |
| Pressure (SPL) | Max. (2500 Ω load) | 155 dB (Threshold of audible pain) |
| Filtered | Contour switch | -7 dB at 400 Hz (to scoop the mids) |
| Electronic | Preamplifier | Integrated (direct male XLR) |
| Food | Ghost | 11V to 52V DC (Phantom Power) |
| Noise Report | S/N Ratio | 64.5 dB |
| Physical | Construction | Black enameled cast metal, steel grille |
| Physical | Net weight | 470 g (1.03 lbs) |
Comparative Analysis
Based on consensus from Modern Drummer, ProSoundWeb and FOH engineers.
| Alternative Product | Market Segment | Comparative Analysis | Available at Garage à Musique |
| Sennheiser e 901 | Direct Competitor | Very good, but its sound is "darker". The 91A is brighter on the attack. | Available here |
| Beyerdynamic TG D71 | German precision | Smaller format, but less gain reserve (SPL) than the Shure. | Product not listed |
| Shure Beta 52A | Dynamic Complement | Excellent for the "Boom", but unable to capture the subtle attack of the 91A. | Available here |
| Audix D6 | Metal / Rock | Very sculpted from the factory, but less versatile than the 91A for jazz or pop. | Available here |
| Kelly SHU | Mounting System | Not a microphone, but often used to suspend a Beta 91A. | Available here |
History & Evolution
The Beta 91A is the evolution of the renowned Beta 91 and the original SM91. The major improvement lies in integrating the preamp directly into the microphone body . Previously, engineers had to deal with a fragile proprietary cable and an external box. With the 91A, you plug a standard XLR cable directly into the microphone, making it one of the most reliable and quickest tools to set up on a festival stage.
Cultural References & Artists
The Beta 91A defines the sound of modern rock:
Lars Ulrich (Metallica) : Un adepte du "click" extrême permis par le 91A.
Travis Barker (Blink-182) : Pour l'attaque ultra-définie requise par le punk-rock.
Ingénieurs FOH de Taylor Swift : Utilisé pour la clarté et la consistance soir après soir.
Festivals d'été du Québec : Présent dans presque tous les kits de micros de batterie de tournée.
FAQ (Frequently Asked Questions)
Do I need to use a microphone stand with the Beta 91A?
No. It's designed to be laid flat on a surface (usually the padding inside the bass drum). That's one of its biggest logistical advantages.
Does it require phantom power?
Yes. Being a condenser microphone, it needs the 48V power supply from your console or audio interface to operate.
What is the small switch underneath for?
This is the contour filter. When activated, it attenuates the low-mids (around 400 Hz) to give your kick drum that instant "modern" sound, without having to touch the console's EQ.
Can I use it for something other than the bass drum?
Absolutely. It is excellent placed on the floor to capture a grand piano, or mounted on a wall for room monitoring or conferences, thanks to its surface microphone nature.
Is it resistant to blows from a wand?
Its die-cast metal casing is extremely robust, but like any condenser microphone, it's best to avoid direct impacts. Fortunately, its position inside the drum naturally protects it.
Why buy my Shure music from Garage à Musique?
We understand the realities of the Quebec music scene. Buying from Garage à Musique guarantees you a 100% authentic product with the Shure Canada warranty. We offer technical support to help you achieve the drum sound you've always dreamed of.
The Authority of the "Kick": Why the Beta 91A is indispensable
The Shure Beta 91A solves the major problem of bass drum recording: the lack of clarity in the attack. Where traditional dynamic microphones can sound "muddy," the Beta 91A uses a high-resolution condenser capsule that captures the drummer's impact with surgical precision.
Its flat design allows it to be simply placed on a pillow or blanket inside the bass drum, eliminating the need for bulky mic stands that slip during the performance. Combined with a low-frequency mic (like the Beta 52A), it creates the perfect modern "kick sound": a sharp attack and a monumental sub-bass foundation.
Full Technical Specifications (Absolute Extraction)
| Category | Characteristic | Technical Details Beta 91A |
| Kind | Transducer | Capacitor electrostatic |
| Directivity | Polar Diagram | Semi-cardioid (Unidirectional) |
| Audio | Frequency response | 20 Hz - 20,000 Hz |
| Sensitivity | (at 1 kHz) | -48.5 dBV/Pa (3.8 mV) |
| Pressure (SPL) | Max. (2500 Ω load) | 155 dB (Threshold of audible pain) |
| Filtered | Contour switch | -7 dB at 400 Hz (to scoop the mids) |
| Electronic | Preamplifier | Integrated (direct male XLR) |
| Food | Ghost | 11V to 52V DC (Phantom Power) |
| Noise Report | S/N Ratio | 64.5 dB |
| Physical | Construction | Black enameled cast metal, steel grille |
| Physical | Net weight | 470 g (1.03 lbs) |
Comparative Analysis
Based on consensus from Modern Drummer, ProSoundWeb and FOH engineers.
| Alternative Product | Market Segment | Comparative Analysis | Available at Garage à Musique |
| Sennheiser e 901 | Direct Competitor | Very good, but its sound is "darker". The 91A is brighter on the attack. | Available here |
| Beyerdynamic TG D71 | German precision | Smaller format, but less gain reserve (SPL) than the Shure. | Product not listed |
| Shure Beta 52A | Dynamic Complement | Excellent for the "Boom", but unable to capture the subtle attack of the 91A. | Available here |
| Audix D6 | Metal / Rock | Very sculpted from the factory, but less versatile than the 91A for jazz or pop. | Available here |
| Kelly SHU | Mounting System | Not a microphone, but often used to suspend a Beta 91A. | Available here |
History & Evolution
The Beta 91A is the evolution of the renowned Beta 91 and the original SM91. The major improvement lies in integrating the preamp directly into the microphone body . Previously, engineers had to deal with a fragile proprietary cable and an external box. With the 91A, you plug a standard XLR cable directly into the microphone, making it one of the most reliable and quickest tools to set up on a festival stage.
Cultural References & Artists
The Beta 91A defines the sound of modern rock:
Lars Ulrich (Metallica) : Un adepte du "click" extrême permis par le 91A.
Travis Barker (Blink-182) : Pour l'attaque ultra-définie requise par le punk-rock.
Ingénieurs FOH de Taylor Swift : Utilisé pour la clarté et la consistance soir après soir.
Festivals d'été du Québec : Présent dans presque tous les kits de micros de batterie de tournée.
FAQ (Frequently Asked Questions)
Do I need to use a microphone stand with the Beta 91A?
No. It's designed to be laid flat on a surface (usually the padding inside the bass drum). That's one of its biggest logistical advantages.
Does it require phantom power?
Yes. Being a condenser microphone, it needs the 48V power supply from your console or audio interface to operate.
What is the small switch underneath for?
This is the contour filter. When activated, it attenuates the low-mids (around 400 Hz) to give your kick drum that instant "modern" sound, without having to touch the console's EQ.
Can I use it for something other than the bass drum?
Absolutely. It is excellent placed on the floor to capture a grand piano, or mounted on a wall for room monitoring or conferences, thanks to its surface microphone nature.
Is it resistant to blows from a wand?
Its die-cast metal casing is extremely robust, but like any condenser microphone, it's best to avoid direct impacts. Fortunately, its position inside the drum naturally protects it.
Why buy my Shure music from Garage à Musique?
We understand the realities of the Quebec music scene. Buying from Garage à Musique guarantees you a 100% authentic product with the Shure Canada warranty. We offer technical support to help you achieve the drum sound you've always dreamed of.