The Shure BETA91A is a premium half-cardioid condenser boundary microphone engineered for kick drums, bass cabinets, pianos, and other low-frequency instruments. Designed for both live sound reinforcement and professional studio recording, it delivers exceptional low-end impact, high-definition attack, and outstanding gain-before-feedback.
Featuring an integrated preamplifier with XLR output, a two-position contour switch for tonal shaping, and a compact low-profile design, the BETA91A offers quick setup inside kick drums without the need for external microphone stands. Its ability to handle extremely high sound pressure levels while maintaining crystal-clear audio makes it a trusted choice for drummers, recording engineers, and live sound professionals worldwide.
Whether you're capturing the punch of a kick drum on stage or recording powerful low-frequency instruments in the studio, the Shure BETA91A delivers consistent, professional-quality performance every time.
| Specification | Details |
|---|---|
| Brand | Shure |
| Model | BETA91A |
| Microphone Type | Condenser Boundary Microphone |
| Polar Pattern | Half-Cardioid |
| Frequency Response | 20 Hz – 20 kHz |
| Sensitivity | -48.5 dBV/Pa (3.80 mV) |
| Equivalent Self-Noise | 29.5 dB(A) |
| Maximum SPL | 155 dB SPL |
| Output Impedance | 146 Ω |
| Low Cut Filter | Yes (Contour Switch) |
| Attenuation Pad | No |
| Output Connector | 3-Pin XLR |
| Interchangeable Capsule | No |
| Phantom Power Requirement | 11–52 VDC |
| Dimensions | 20.3 × 139.1 × 95.11 mm (0.799 × 5.476 × 3.744 in) |
| Weight | 470 g (1.036 lbs) |
This professional boundary microphone is the ideal solution for musicians and audio engineers seeking powerful low-frequency performance, exceptional clarity, and reliable operation in both live and studio environments.
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