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Cardioid Condenser Boundary Microphone
Product Description
The phantom-powered U851Rb cardioid condenser boundary microphone offers outstanding speech intelligibility and transparent sound quality for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations. The microphone is equipped with a PivotPoint rotating output connector, UniSteep filter and UniGuard RFI-shielding technology. It accepts interchangeable condenser elements, available separately in hypercardioid and omnidirectional polar patterns. With a heavy die-cast case and silicon foam bottom pads to minimize coupling of surface vibration to the microphone, the U851Rb is equipped with self-contained electronics, eliminating the need for an external power module. Threaded inserts on the bottom of the microphone allow it to be mounted with screws for increased security.
Available in two colors: black (U851Rb) and white (U851RWb)
- 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° to 360°
- 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)
| Element | Fixed-charge back plate, permanently polarized condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 20-20,000 Hz |
| Open Circuit Sensitivity | -34 dB (19.9 mV) re 1V at 1 Pa |
| Switches | Flat, roll-off |
| Dynamic Range | 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 |
| Weight | 253 g |
| Dimensions | 23.0 mm H x 83.9 mm W x 108.0 mm D |
| Output Connector | Microphone: TB3M-type Cable: 3-pin XLRM-type |
| Accessories Included | Soft protective pouch |
Trusted by industry professionals
Whether it’s on the boardroom table, the stage or in the studio, Audio-Technica products are trusted time and again by industry professionals looking for reliable, lovingly developed audio products for all budgets.
It’s Audio-Technica’s commitment to innovation, customer service and meticulous design that ensure professionals turn to us to provide solutions in conferencing, houses of worship, broadcasting, live sound, recording studios and beyond.
50 Years of Devotion to music
For over 50 years Audio-Technica has worked alongside leading figures in sports and music broadcast to develop and hone a range of products that deliver on the highest level.
Audio-Technica have developed and delivered products to power the Grammys, World Cup, Super Bowl, Commonwealth Games as well as every Summer and Winter Games from Atlanta 1996 to Sochi 2014.
A Legacy in Innovation
Founded in 1962 by Hideo Matsushita, Audio-Technica positioned itself immediately as a leader in the manufacture and design of innovative audio products.
Its expertise in innovation quickly spread to various new fields and led to the development of tone arms, microphones and headphones. Audio-Technica soon became a benchmark in those fields. Making history.
A self-made man and audiophile, Hidéo Matsushita was the former Director of the Tokyo Museum of Modern Art. It all started in his workshop, with the hand crafting of stereo cartridges. 50 years later, Audio-Technica has become a global leader in audio innovation.
A Passion for Listening
Humility, passion, creativity and expertise in sound are the core values behind Audio-Technica’s legacy, greatly inspired by its founder - whose imprint on the company’s philosophy is still felt today.
Audio-Technica’s passion for listening evolved in the 70’s, when it started designing headphones, building upon a legacy in innovation, meticulous engineering and artistic design.
Today, Audio-Technica’s audio products have become globally synonymous with consistently high sonic performance paired with impeccable build construction and artistic design.
One Year Limited Warranty
All Audio-Technica products come with a one year warranty as standard meaning you can enjoy your product safe in the knowledge that you’re covered.
All Audio-Technica products purchased from Audio-Technica Europe are guaranteed for one year from the date of purchase to be free of defects in materials and workmanship. In the event of such defect, the product will be repaired or replaced without charge*.
(* T&Cs apply)