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Omnidirectional Condenser Boundary Microphone
Overview
U841A
The U841A delivers exceptionally intelligible audio reproduction in a super-compact, low-profile design. Equipped with UniGuard® RFI-shielding technology, this omnidirectional condenser boundary microphone is designed for clear, highly intelligible sound reinforcement, professional recording, television and conferencing in surface-mount applications. The U841A has a 360° pickup angle and operates on battery or phantom power.
Features
- Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
- 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 silicone foam bottom pad 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 | Omnidirectional in hemisphere above mounting surface |
| Frequency Response | 30-20,000 Hz |
| Low Frequency Roll Off | 80 Hz, 18 dB/octave |
| Open Circuit Sensitivity | Phantom: –39 dB (11.2 mV) re 1V at 1 Pa Battery: –40 dB (10.0 mV) re 1V at 1 Pa |
| Maximum Input Sound Level | Phantom: 132 dB, 1 kHz at 1% T.H.D. Battery: 122 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 | 73 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) | 2.8 oz (78 g) |
| Weight (Power Module) | 4.9 oz (139 g) |
| Weight | 78 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 | Ø 65.0 - h:15.1 mm - 108.0 (L) x 84.0 (W) x 23.0 (H) mm |
| 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) | 2.56" (65.0 mm) diameter, 0.59" (15.1 mm) height |
| Output Connector (Power Module) | Integral 3-pin XLRM-type |
| Output Connector | 3-pin XLRM-type |
| Accessories Included | AT8531 power module; battery; soft protective pouch |
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