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collapse expand iconDescription

Featuring breakthrough audio and mechanical design innovations, the phantom-powered U851R offers outstanding speech intelligibility and transparent sound quality for surface-mount applications. The microphone is equipped with a PivotPoint rotating output connector, UniSteep filter and UniGuard RFI-shielding technology. It accepts interchangeable condenser elements”available for boundary microphones in cardioid, hypercardioid and omnidirectional polar patterns. With a heavy die-cast case and silicon foam bottom pads to minimize coupling of surface vibration to the microphone, the U851R is equipped with self-contained electronics, eliminating the need for an external power module.
Open Box Audio-Technica U851R Boundary Mic Level 1 Black
Open Box Audio-Technica U851R Boundary Mic Level 1 Black
Open Box Audio-Technica U851R Boundary Mic Level 1 Black

collapse expand iconFeatures

  • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, and conferencing
  • 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)
  • Self-contained electronics eliminate need for external power module
  • 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 surface vibration to the microphone
  • Low-profile design with low-reflectance finish for minimum visibility

collapse expand iconSpecs

  • ELEMENT: Fixed-charge back plate, permanently polarized condenser
  • POLAR PATTERN: Half-cardioid (cardioid in hemisphere above mounting surface)
  • FREQUENCY RESPONSE: 30-20,000 Hz
  • LOW FREQUENCY ROLL-OFF : 80 Hz, 18 dB/octave
  • OPEN CIRCUIT SENSITIVITY: ”34 dB (19.9 mV) re 1V at 1 Pa
  • IMPEDANCE: 200 ohms
  • MAXIMUM INPUT SOUND LEVEL: 134 dB SPL, 1 kHz at 1% T.H.D.
  • DYNAMIC RANGE (TYPICAL):108 dB, 1 kHz at Max SPL
  • SIGNAL-TO-NOISE RATIO: 68 dB, 1 kHz at 1 Pa
  • PHANTOM POWER REQUIREMENTS: 11-52V DC, 4 mA typical
  • SWITCH: Flat, roll-off
  • WEIGHT: 9.2 oz (262 g)
  • DIMENSION: 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
  • OUTPUT CONNECTOR: TB3M-type
  • CABLE: 25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors

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