Omnidirectional Microphone 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: 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 Impedance: Phantom: 200 ohms, Battery: 270 ohms 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 (typical): 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 Requirement: 11-52V DC, 2 mA typical Output Connector: Integral 3-pin XLRM-type Battery Type: 1.5V AA/UM3 Battery Current / Life: 0.4 mA / 1200 hours typical (alkaline) Switch: Off, on-flat, on-roll-off Cable Length: 25.0' / 7.6m (permanently attached to microphone), 0.13" / 3.2mm (Diameter), 2-conductor, shielded cable with TA3F-type connector Dimensions: Microphone: 2.56x0.59" / 6.50x1.49cm, Power Module: 3.31x2.48x0.87" / 8.40x6.29x2.20cm Weight: Microphone: 2.8oz / 79.37g, Power Module: 4.9oz / 138.91g