Continue Shopping View Cart
Markertek - The Future of Broadcast Supply

Call 800-522-2025
M-F 8:30am - 7pm EST

Free Shipping Promo Box

FREE SHIPPING No Minimum Order!

SHOP MARKERTEK EVERYDAY for all of your needs. Free shipping on almost every order placed on our website.
Special order & oversized freight intensive items ship at an additional cost. Continental US orders only.

Fast Economical International Shipping
Markertek makes it EASY for our international customers to get their orders!

At check-out you can view our very affordable international shipping rates that are ALL-INCLUSIVE with your GUARANTEED LANDED COST and NO SURPRISE FEES!

*Economy International Shipping delivery time is approximately 7-14 days. Economy International Shipping is available to select countries. Not all products are eligible.

Secure LoginClose X

Returning Markertek Customers

New Markertek Customers

Why Create an Account?

Creating a Markertek account now will save you time on future orders. You'll have full access to your order history and a personalized shopping experience.

Audio-Technica U851R Cardioid Unipoint Boundary Mic - Black
  • Audio-Technica U851R Cardioid Unipoint Boundary Mic - Black
  • Audio-Technica U851R Cardioid Unipoint Boundary Mic - Black
  • Audio-Technica U851R Cardioid Unipoint Boundary Mic - Black
  • Audio-Technica U851R Cardioid Unipoint Boundary Mic - Black
Questions? Ask a Markertek Expert:
800-522-2025 Email

Audio-Technica U851R Cardioid Unipoint Boundary Mic - Black

Manufacturer: Audio-Technica

Item #: U851R   •   MFG #: U851R


Our Price:$219.00

free ship
Availability: Direct Ship From Manufacturer
Item ships directly from the manufacturer. Normal delivery time is 2-7 business days and is subject to manufacturer availability. Need it sooner? Call 800-522-2025, or email Customer Service for expedited delivery options.
  • 2 - 7 Day Normal Delivery Time - Faster Shipping Options at Checkout or Call Us.



The Audio Technica U851R is a wide-range condenser microphone with a cardioid polar pattern. It is designed for surface-mount applications such as high quality sound reinforcement, conferencing, professional recording, television and other demanding sound pickup applications. The microphone requires 11V to 52V phantom power for operation.The microphone is equipped with UniGuard RFI-shielding technology, which offers outstanding rejection of radio frequency interference (RFI). The microphone's cardioid polar pattern provides a 120 Degree angle of acceptance (cardioid in hemisphere above mounting surface). Additional interchangeable elements with omnidirectional (360 degree) and hypercardioid (100 degree) pickup patterns are available.The microphone includes a 7.6 m (25') output cable terminating in special TA3F type and XLRM type connectors designed to optimize RFI immunity. The output of the microphone is a TB3M type connector. The microphone is equipped with Audio-Technica's unique PivotPoint rotating output connector. A switch permits choice of flat response or low-frequency roll-off (via integral 80 Hz high-pass UniSteep filter) to help control undesired ambient noise.The microphone's heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone. The microphone includes a soft protective pouch and features a lowreflectance black finish. It is also available in white as the U851RW.

Please Note: This mic is phantom powered only! It is not battery powered!

PivotPoint rotating output connector allows cable to exit from either the rear or the bottom of the microphone
Small-diameter UniPoint cardioid 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
UniSteep filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
Available interchangeable elements permit angle of acceptance from 100 degree to 360 degree
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
Available in two colors: black (U851R) and white (U851RW)
Also available in a wireless model, U851cW

Did You Know...... that while boundary mics are widely utilized in conference rooms and training applications many Audio Engineers use them as drum recording mics. It's true! Musicians and Audio Engineers can benefit from a pair of boundary mics by placing them on the floor on both sides of a kick drum, on the walls or even inside the kick drum. Have fun experimenting to find your killer drum sound.

  • Specifications

    • ELEMENT Fixed-charge back plate, permanently polarized condenser
    • POLAR PATTERN Half-cardioid (cardioid in hemisphere above mounting surface)
    • FREQUENCY RESPONSE 30-20,000 Hz
    • LOW FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave
    • OPEN CIRCUIT SENSITIVITY -34 dB (19.9 mV) re 1V at 1 Pa
    • IMPEDANCE 200 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
    • PHANTOM POWER REQUIREMENTS 11-52V DC, 4 mA typical
    • SWITCH Flat, roll-off
    • WEIGHT 9.2 oz (262 g)
    • DIMENSIONS 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
    • CABLE 25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors
    • OPTIONAL INTERCHANGEABLE ELEMENTS UE-H hypercardioid (100°); UE-O omnidirectional (360 degree)
    • ACCESSORY FURNISHED Soft protective pouch

Add Accessories for your U851R: