Omnidirectional Condenser Boundary Microphone


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  • Gallery
  • Features
  • Specifications



  • 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


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.


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 SPL (1 kHz at 1% THD)
Dynamic Range 105 dB (1 kHz at Max SPL)
Signal-to-Noise Ratio 69 dB (1 kHz at 1 Pa)
Phantom Power Requirements 11-52 V DC, 2 mA typical
Weight 84 g
Cable 7.6 m (25.0’) long, 3.2 mm (0.13") diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors
Dimensions 65.0 mm (2.56") diameter, 15.1 mm (0.59") height
Output Connector TB3M-type
Accessories Included Pouch


U841R Declaration of Conformity
U841R Dimensions
U841R Quick Start Guide
U841R User Manual (RU)
U841R User Manual (PT)
U841R User Manual (IT)
U841R User Manual (ES)
U841R User Manual (FR)
U841R User Manual (DEU)
U841R User Manual (EN)