Shure BETA 91A Microphone

Shure BETA 91A Half-Cardioid Condenser Microphone

The Shure BETA 91A is a premium, half-cardioid condenser microphone specifically designed for miking kick drums, pianos, and other low-frequency instruments. A unique feature of this microphone is its integrated preamp, located directly within the microphone housing, eliminating the need for external boxes or additional cables; the microphone has a standard XLR connector. This significantly simplifies stage setup and reduces clutter.

The BETA 91A features a two-position contour switch that allows you to tailor the sound characteristics as needed. The "Flat" setting provides natural sound reproduction (perfect for piano), while the "Low-Mid Scoop" setting emphasizes low frequencies and attack, providing a "punch" effect ideal for kick drums. The microphone is designed to withstand extremely high sound pressure levels (up to 155 dB SPL), making it perfectly suited for even the loudest live sound environments.

Key Features

• Purpose: Miking kick drums and low-frequency instruments (piano).
• Capsule: Half-cardioid condenser capsule for precise low-frequency capture.
• Integrated Preamp: XLR connector is directly on the microphone, no external adapter needed.
• Contour Switch: Choice between a flat response and a low-mid scoop for increased attack.
• Maximum SPL: Withstands extremely high sound pressure (155 dB).
• Design: Low-profile, robust metal housing, placed directly inside the drum or on the piano's soundboard.

Technical Specifications

• Type: Electret Condenser
• Polar Pattern: Half-cardioid
• Frequency Response: 20 Hz – 20,000 Hz
• Output Impedance: 146 Ω
• Sensitivity: -48.5 dBV/Pa (3.8 mV)
• Maximum SPL: 155 dB (at 1 kHz, 1% THD, 2500 Ω load)
• Signal-to-Noise Ratio: 64.5 dB
• Dynamic Range: 125.5 dB
• Connector: 3-pin XLR Male connector
• Power: Requires 11–52 V DC phantom power
• Weight: Approximately 470 g
• Dimensions: 20 x 95 x 139 mm

Included Accessories

• 1 x Shure BETA 91A microphone
• 1 x Zippered protective pouch
• 1 x User documentation

Intended for

• Drummers (for internal kick drum miking).
• Pianists (for mounting to the piano soundboard).
• Sound engineers looking for powerful low frequencies and strong attack.