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
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 (typical):
- 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)
- SWITCH: Off, on-flat, on-roll-off
- WEIGHT (MICROPHONE): 8.6 oz (244 g)
- WEIGHT (POWER MODULE): 4.9 oz (139 g)
- DIMENSIONS (MICROPHONE): 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
- DIMENSIONS (POWER MODULE): 3.31" (84.0 mm) H x 2.48" (63.0 mm) W x 0.87" (22.0 mm) D
- OUTPUT CONNECTOR (POWER MODULE): Integral 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
- OPTIONAL INTERCHANGEABLE ELEMENTS: UE-H hypercardioid (100°); UE-O omnidirectional (360°)
- ACCESSORIES FURNISHED: AT8531 power module; battery; soft protective pouch
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