The U841R 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 quality in surface-mount applications. The phantom-powered U841R is equipped with self-contained electronics, eliminating the need for an external power module.

• Designed for surface-mount applications where highly intelligible sound quality is required
• Small-diameter omnidirectional capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Superior off-axis rejection for maximum gain before feedback
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Self-contained electronics eliminate need for external power module
• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance finish for minimum visibility

Microphones
Element	Fixed-charge back plate, permanently polarized condenser
Polar Pattern	Omnidirectional in hemisphere above mounting surface
Frequency Response	40-20,000 Hz
Open Circuit Sensitivity	–35 dB (17.7 mV) re 1V at 1 Pa
Maximum Input Sound Level	130 dB, 1 kHz at 1% T.H.D.
Dynamic Range	105 dB, 1 kHz at Max SPL
Signal-to-Noise Ratio	69 dB, 1 kHz at 1 Pa
Phantom Power Requirements	11-52V DC, 2 mA typical
Weight (Microphone)	84 g (3.0 oz)
Weight	84 g
Cable	7.6 m (25.0') long, 3.2 mm (0.13") diameter, 2-conductor, shielded cable with TA3F-type and XLRM-type connectors
Dimensions	65.0 mm (2.56") diameter, 15.1 mm (0.59") height
Dimensions (Microphone)	65.0 mm (2.56") diameter, 15.1 mm (0.59") maximum height
Output Connector	TB3M-type
Accessories Included	Soft protective pouch