audio-technica U851A

CARDIOID CONDENSER BOUNDARY MICROPHONE

Ideal for sound reinforcement, professional recording and conferencing
PivotPoint® rotating output connector
Superior off-axis rejection for maximum gain before feedback
Outstanding rejection of radio frequency interference (RFI)
Small-diameter UniPoint capsule near boundary
Operates on battery or phantom power

U851A

U851A

CARDIOID CONDENSER 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
U851A
Element Polarized condenser
Polar Pattern Half-cardioid (cardioid in hemisphere above mounting surface)
Frequency Response 30 - 20,000 Hz
Open Circuit Sensitivity Phantom: -40 dB (10.0 mV) re 1V at 1 Pa Battery: -41 dB (8.9 mV) re 1V at 1 Pa
Impedance Phantom : 200 ohms - Battery: 270 ohms
Maximum Input Sound Level Phantom: 133 dB, 1 kHz at 1% T.H.D. - Battery: 123 dB, 1 kHz at 1% T.H.D.
Low Frequency Roll Off 80 Hz, 18 dB/octave
Switches Off, on-flat, on-roll-off
Dynamic Range 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
Battery Type 1.5V AA/UM3
Battery Current/Life 0.4 mA / 1200 hours typical (alkaline)
Weight 8.6 oz (244 g)
Dimensions 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
Output Connector 3-pin XLRM-type
Cable 25.0' (7.6 m) long (permanently attached to microphone), 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
Accessories Included AT8531 power module; battery; soft protective pouch

Please complete the form below and we'll get back to you as soon as possible.