Audio-Technica U851RWb Review: Full technical specification

Alistair Vance
Written by Alistair Vance

May 10, 2026

Audio-Technica U851RWb

Audio-Technica U851RWb Review: Full technical specification

Technical analysis of Audio-Technica microphone

  • Semi cardioid
  • Frequency response: 30 – 20,000 Hz
  • 138 dB SPL max.
  • Switchable low cut: 150 Hz
  • 6dB/Octave
  • UniGuard technology for shielding against RF interference such as mobile phones
  • Phantom power 9-52V
  • Detachable 7.6 m cable with TAF3 connector on the microphone side and screw terminals on the mains adapter
  • Colour: White

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Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Audio-Technica U851RWb Review: Full technical specification

Additional Information

Customer Review Summary

The Audio-Technica U851RWb is an exceptional microphone that has proven to be highly effective in challenging environments, such as a neo-Gothic church where it is used as an altar microphone. Its performance is impressive, with clean highs and a wide midrange that avoids any artificial exaggeration. The sound quality is remarkably homogeneous, making it suitable for direct speech.

The output level is satisfactory, ranging from medium to high, and the self-noise is virtually imperceptible, enhancing the overall experience. The low-cut filter further streamlines the setup process, ensuring optimal sound quality.

In terms of handling, the microphone is easy to grip, even when adjustments are needed around the altar. It delivers a solid output, which is crucial for congregational settings. Overall, this microphone comes highly recommended for its discreet design and excellent sound quality.

One minor drawback is the absence of the M3 screws, which would facilitate ceiling or wall mounting. However, the audio capture remains outstanding regardless, making it a great choice for anyone in need of reliable performance.

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Alistair Vance

Based in Bristol, Al has spent over a decade mixing local bands before specialising in hybrid studio consulting. He’s obsessed with the price-to-performance ratio, helping musicians achieve a "Radio Ready" sound without the need for a £50,000 Neve console. No fluff, just honest gear reviews to get your tracks sounding professional on a real-world budget.

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