Cardioid Condenser Boundary Microphone U851A

• 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 silicone 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

This product has been discontinued. Please see our other options for Boundary Microphones. 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.

Element: 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: Phantom: -40 dB (10.0 mV) re 1V at 1 Pa Battery: -41 dB (8.9 mV) re 1V at 1 Pa
Maximum Input Sound Level: Phantom: 133 dB, 1 kHz at 1% T.H.D. - Battery: 123 dB, 1 kHz at 1% T.H.D.
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)
Switches: Off, on-flat, on-roll-off
Weight: 8.6 oz (244 g)
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
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
Accessories Included: AT8531 power module; battery; soft protective pouch