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U851A Cardioid Condenser Boundary Microphone
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 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 | |
|---|---|
| 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 |
| SPECIFICATION GRAPHS | ||
|---|---|---|
| Click on the chart to view the larger image | ||
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| WARRANTIES | ||
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U851A Cardioid Condenser Boundary Microphone
Age:Â 55-65
User Type:Â Other
Experience:Â Pro
1 year, 1 month ago
Answers
Answer:Â
Thank you for your inquiry. No, you must use the power module. The power module attached to some condenser microphones provides several important functions. First, it converts the 11 – 52 VDC phantom power into a smaller DC bias voltage used to power the FET impedance matching circuit inside the microphone. Also, it provides low frequency roll off, supplies battery power if phantom power is not available, converts the signal to the proper impedance and balances the output. The power module is a necessary component.Please note this mic is available as a phontom power only version that has just an XLR connector (U851R).
Age:Â 45-54
Experience:Â Pro
1 year, 1 month ago
by
Stow, OH
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U851A : Cardioid Condenser Boundary Microphone
