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Audio-Technica U841A
Omnidirectional Condenser Boundary Microphone

OUR PART #:  U841A

The U841A delivers exceptionally intelligible audio reproduction in a super-compact, low-profile design.
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Our Price: $249.00
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Audio-Technica U841A
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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.


  • Designed for surface-mount applications such as high-quality soundreinforcement, professional recording, television, conferencing and otherdemanding sound pickup situations
  • UniGuard™ RFI-shielding technology offers outstanding rejection of radiofrequency interference (RFI)
  • UniSteep® filter provides a steep low-frequency attenuation to improvesound pickup without affecting voice quality
  • Small-diameter UniPoint capsule near boundary eliminates phase distortionand delivers clear, high-output performance
  • Heavy die-cast case and silicon foam bottom pad minimize coupling ofsurface vibration to the microphone
  • Low-profile design with low-reflectance black finish for minimumvisibility
  • Operates on battery or phantom power


  • 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: 101dB, 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)
  • Switch: Off, on-flat, on-roll-off
  • Weight (microphone): 2.8 oz
  • Weight (power module): 4.9 oz
  • Dimensions (microphone): 2.56" diameter, 0.59" height
  • Dimensions (power module, H x W x D): 3.31" x 2.48" x 0.87"
  • Output Connector (power module): Integral 3-pin XLRM-type
  • Cable: 25' long (permanently attached to microphone), 0.13" diameter,2-conductor, shielded cable with TA3F-type connector
  • Accessories Furnished: AT8531 power module; battery; soft protectivepouch
Audio-Technica AT8531 Replacement power module
Audio-Technica AT8531 Replacement power module
 Power module with on/off/roll-off switch and XLR-style output connector for the AT841A/ AT851A/ AT853A microphones.
72.97 99.00 26

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