Audio Technica U851A Cardioid Condenser Boundary Microphone
Product Code: U851A
Features
• 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
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 |
| 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. |
| 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 Life |
0.4 mA / 1200 hours typical (alkaline) |
| Weight |
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 |
|
|
