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Audio-Technica U851A

Pricing & Availability

  • MSRP: $315

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U851A Documentation

OmnidirectionalAudio-Technica U851A

Omnidirectional Boundary Microphone

Offering outstanding Audio-Technica sound for surface-mount applications, the U851A 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 microphone sets audio-quality standards in challenging acoustic environments.

  • 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 rear or 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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Specifications

Frequency Response - OmnidirectionalClick Graph to Compare!
U851A Omnidirectional Frequency Response Chart
Pickup Patterns Pads & Filters
Omnidirectional (10 mV/Pa; 30 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
n/a 200 Ohms (Low) Max SPL: 133 dB
Self-noise: 22.0 dB(A)
Weight Length Max Diameter Interface(s)
244g (8.61oz) 108mm (4.25'') 84mm (3.31'')
    Power Specifications
    • Requires phantom power
    • Has battery compartment (1.5V AA/UM3)
    • Phantom voltage: 11-52v

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