Audio-Technica U851RB Cardioid Condenser Boundary Microphone with Integral Power Module, Phantom Power Only, Black

SKU: ATU851RB MFR: U851RB
Earn VIP Reward Points

Key Features

  • Capture pristine audio with this Audio-Technica boundary microphone for clear conference calls.
  • Achieve exceptional sound quality using the cardioid condenser, perfect for detailed recordings.
  • Enjoy a wide 20-20,000 Hz frequency response, ensuring natural and accurate sound reproduction.
  • Minimize unwanted noise with the built-in low-frequency roll-off feature at 80 Hz, 18 dB/octave.
  • Rely on the durable build quality and robust design, ideal for demanding professional environments.
  • Easily connect with the included TA3F to XLR cable, offering a seamless setup for any system.
See More Product Details
Special Order?Estimated to Ship: 09/09/2025
Free Shipping

See Options

1

Protect your gear with Adorama Protect.* Learn more

1 Year

$29.99

2 Year

$49.99

3 Year

$59.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Reviews about this item

Review Summary

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

Audio-Technica U851RB Specifications

  • Color

    Black

  • Element

    Fixed-charge back plate, permanently polarized condenser

  • Polar Pattern

    Cardioid

  • Frequency Response

    20-20,000 Hz

  • Low Frequency Roll-Off

    80 Hz, 18 dB/octave

  • Open Circuit Sensitivity

    -34 dB (19.9 mV) re 1V at 1 Pa

  • Impedance

    50 ohms

  • Maximum Input Sound Level

    134 dB SPL, 1 kHz at 1% T.H.D.

  • Dynamic Range (Typical)

    108 dB, 1 kHz at Max SPL

  • Signal-To-Noise Ratio

    68 dB, 1 kHz at 1 Pa, A-weighted

  • Phantom Power Requirements

    11-52V DC, 4.4 mA

  • Switch

    Flat, roll-off

  • Output Connector

    Microphone: TB3M-type
    Cable: 3-pin XLRM-type

  • Cable (L x Diameter)

    25.0' x 0.13" (7.6m x 3.2mm), 2-conductor, shielded cable with TA3F and XLRM connectors

  • Optional Interchangeable Elements

    UE-H hypercardioid (100 Degree )
    UE-O omnidirectional (360 Degree )

  • Accessory Furnished

    Soft protective pouch

  • Dimensions (H x W x D)

    0.91 x 3.30 x 4.25" (23.0 x 83.9 x 108mm)

  • Weight

    8.9 oz (253g)

  • UPC Code

    4961310146689

About Audio-Technica U851RB

Bring your audio recording and amplification to the next level with the U851RB Cardioid Condenser Boundary Microphone. This high-quality, professional-grade microphone, crafted by the reputable brand Audio-Technica, is designed specifically for surface-mount applications. It's perfect for a range of demanding sound pickup situations, including professional recording, television, conferencing, and high-quality sound reinforcement.

This stylish black microphone is phantom-powered and features a cardioid polar pattern, expertly capturing sound sources directly in front of the microphone while minimizing sound from other directions. This makes it an ideal choice for recording live performances, podcasting, or any application where you want to focus on a specific sound source.

The U851RB microphone is equipped with a PivotPoint rotating output connector, UniSteep filter, and UniGuard RFI-shielding technology, ensuring clear, transparent sound quality and outstanding speech intelligibility. It also accepts interchangeable condenser elements, available separately in hypercardioid and omnidirectional polar patterns, providing you with the flexibility to adapt to any recording situation.

Constructed with a durable, heavy die-cast case and silicon foam bottom pads, this microphone effectively minimizes the coupling of surface vibration, ensuring a stable and reliable performance. The self-contained electronics eliminate the need for an external power module, making it a convenient and efficient choice for your audio needs. Plus, the threaded inserts on the bottom of the microphone allow for secure mounting with screws, adding an extra layer of security.

Incorporate the U851RB Cardioid Condenser Boundary Microphone into your audio setup and experience the difference in sound quality and performance that Audio-Technica products are known for.

Audio-Technica U851RB Features

  • Cardioid condenser boundary microphone
  • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
  • Superior off-axis rejection for maximum gain before feedback
  • PivotPoint rotating output connector allows cable to exit from either the rear or the bottom of the microphone
  • Small-diameter UniPoint element near boundary eliminates phase distortion and delivers clear, high-output performance
  • Available interchangeable elements permit angle of acceptance from 100 Degree to 360 Degree
  • 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 silicone foam bottom pads minimize coupling of surface vibration to the microphone
  • Low-profile design with low-reflectance finish for minimum visibility
  • Threaded inserts on bottom of microphone allow it to be mounted with screws for increased security
  • Available in two colors: black (U851Rb) and white (U851RWb)

Warranty Information

This product has a limited warranty of 24 months.

Product Documents

User Manual

Key Features

  • Capture pristine audio with this Audio-Technica boundary microphone for clear conference calls.
  • Achieve exceptional sound quality using the cardioid condenser, perfect for detailed recordings.
  • Enjoy a wide 20-20,000 Hz frequency response, ensuring natural and accurate sound reproduction.
  • Minimize unwanted noise with the built-in low-frequency roll-off feature at 80 Hz, 18 dB/octave.
  • Rely on the durable build quality and robust design, ideal for demanding professional environments.
  • Easily connect with the included TA3F to XLR cable, offering a seamless setup for any system.

What's in the box:

  • U851RB Cardioid Condenser Boundary Microphone (Black)
  • TA3F to XLR Male Microphone Cable (25')
  • Soft Protective Pouch
  • Audio-Technica 2 Year Limited Warranty