divider-line Cardioid Condenser Boundary Microphone, for A-T UniPak Transmitter


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Cardioid Condenser Boundary Microphone, for A-T UniPak Transmitter


The U851cW is an half-cardioid condenser boundary microphone for Audio-Technica UniPak™ transmitter. Offering outstanding Audio-Technica sound for surface-mount applications, the U851cW features a PivotPoint® rotating output connector, UniSteep® filter and UniGuard® RFI-shielding technology. This 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)
  • 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
  • Boundary microphone for use with Audio-Technica UniPak™ transmitters


Element Polarized condenser
Polair patroon Half-cardioid (cardioid in hemisphere above mounting surface)
Gewicht 8.6 oz (244 g)
Afmetingen 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
Uitgangsconnector 4-pin HRS-type for A-T wireless transmitter
Meegeleverde accessoires Soft protective pouch



U851cW Declaration of Conformity
U851cW Frequency Response
U851cW Polar Pattern