Audio Technica U851A

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.

Specifications:

• 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: 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 SPL, 1 kHz at 1% T.H.D. Battery: 123 dB SPL, 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 Requiremens: 11-52V DC, 2 mA typical

• Battery Type: 1.5V AA/UM3

• Battery Current Life: 0.4 mA / 1200 hours typical (alkaline)

• Switch: Off, on-flat, on-roll-off

• 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