Accepts optional elements.

Offering outstanding Audio-Technica sound for surface-mount applications, the U851A UniPoint Boundary Microphone features a PivotPoint rotating output connector, UniSteep filter and UniGuard RFI-shielding technology. This battery or phantom powered condenser microphone accepts interchangeable condenser elements-available for boundary microphones in cardioid, hypercardioid and omnidirectional polar patterns. Its heavy die-cast case and silicon foam bottom pads minimize coupling of surface vibration to the microphone. With superior off-axis rejection and maximum gain-before-feedback, this professional flat microphone sets audio-quality standards in challenging acoustic environments.

Audio-Technica U851A UniPoint Cardioid Condenser Boundary Microphone Features:

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
• PivotPoint rotating output connector allows cable to exit from either the rearor the bottom of the microphone
• Superior off-axis rejection for maximum gain before feedback
• UniGuard RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• UniSteep filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
• Small-diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance black finish for minimum visibility
• Operates on battery or phantom power

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Audio-Technica U851A UniPoint Cardioid Condenser Boundary Microphone Specifications:

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Omnidirectional in hemisphere above mounting surface
• Frequency Response: 30-20,000 Hz
• Low Frequency Roll-off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: Phantom —39 dB (11.2 mV) re 1V at 1 Pa; Battery —40 dB (10.0 mV) re 1V at 1 Pa
• Impedance: Phantom 200 ohms; Battery 270
• Maximum Input Sound Level: Phantom 133 dB, 1 kHz at 1% T.H.D.; Battery 123 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range (Typical): Phantom 111 dB, 1 kHz at Max SPL; Battery 101 dB, 1 kHz at Max SPL
• Signal-To-Noise Ratio: 72 dB, 1 kHz at 1 Pa
• Phantom Power Requirements: 11-52V DC, 2 mA typical
• Optional Interchangeable Elements: UE-H hypercardioid (100°); UE-O omnidirectional (360°)
• Battery Type: 1.5V AA/UM3