Cardioid Condenser Boundary Microphone ยี่ห้อ Audio-Technica รุ่น U851A
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.
Features
- 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
Specifications
| Microphone | |
|---|---|
| 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 |
| 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 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 (Microphone) | 8.6 oz (244 g) |
| Weight (Power Module) | 4.9 oz (139 g) |
| 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 |
| Dimensions (Power Module) | 3.31″ (84.0 mm) H x 2.48″ (63.0 mm) W x 0.87″ (22.0 mm) D |
| Dimensions (Microphone) | 4.25″ (108.0 mm) long, 3.31″ (84.0 mm) maximum width, 0.91″ (23.0 mm) height |
| Output Connector (Power Module) | Integral 3-pin XLRM-type |
| Output Connector | 3-pin XLRM-type |
| Optional Interchangeable Elements | UE-H hypercardioid (100°); UE-O omnidirectional (360°) |
| Accessories Included | AT8531 power module; battery; soft protective pouch |
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