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Shure Beta 91A
Half-cardioid bass drum microphone from Shure. Low-profile design with strong low-end response and high SPL handling.
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Shure Beta 91A
Half-cardioid bass drum microphone from Shure. Low-profile design with strong low-end response and high SPL handling.
Product Description
The Shure Beta 91A is a half-cardioid condenser microphone built specifically for bass drum, offering strong low end and maximum gain-before-feedback. Its low-profile, precision-engineered design drops easily into the bass drum without external mounting, and a two-position contour switch lets you tailor the sound to the application.
- Half-cardioid polar pattern for maximum gain-before-feedback and rejection of off-axis sound
- Low-profile design with integrated preamp and XLR connector for fast, clutter-free setup
- Frequency response tailored for bass drum and other low-frequency sources, with a wide dynamic range for high SPL environments
- Two-position contour switch: "flat" for a natural sound or "low-mid scoop" for strong low-frequency punch with pronounced high-frequency attack
- Requires no external mounting
Best Suited For
The primary use for the Beta 91A is bass drum, but it also works well for other low-frequency sources, including piano.
Features
The Beta 91A is a half-cardioid condenser microphone tailored for bass frequencies. It delivers a strong low-end response and studio-quality attack and punch, even at extremely high sound pressure levels (SPL).
Difference From the Beta 91
The Beta 91A features a new, updated microphone capsule compared to its predecessor, the Beta 91. The new capsule provides a more natural high-frequency response.
Other Shure Bass Drum Microphones
The Shure Beta 52A is a supercardioid microphone also well suited for bass drum, and is an even more affordable alternative.
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Specifications
| Cartridge Type | Electret Condenser |
| Polar Pattern | Half-cardioid (cardioid in hemisphere above mounting surface) |
| Frequency Response | 20 to 20,000 Hz |
| Output Impedance @ 1 kHz | 146 Ω |
| Sensitivity, open circuit voltage | @ 1 kHz, typical −48.5 dBV/Pa (3.8 mV) |
| Maximum SPL | 1 kHz at 1% THD: 2500 Ω load 155 dB, 1000 Ω load 151 dB |
| Signal-to-Noise Ratio | 64.5 dB |
| Dynamic Range | @ 1 kHz: 2500 Ω load 125.5 dB, 1000 Ω load 121.5 dB |
| Self Noise (equivalent SPL) | A-weighted, typical 29.5 dB SPL-A |
| Common Mode Rejection | 20 Hz to 200 kHz ≥55 dB |
| Frequency Contour Switch | 7 dB of attenuation centered at 400 Hz |
| Polarity | Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 |
| Power Requirements | 11–52 V DC phantom power (IEC-61938), 5.4 mA |
| Net Weight | 470 g (16.6 oz.) |
- Fast delivery In-stock items shipped as quickly as possible
- 30-day return policy Try it at home, risk-free
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- Drum specialists We help you choose the right gear
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