Achieve clear, intelligible speech reproduction with the black Audio-Technica U851RbO, an omnidirectional condenser boundary microphone optimized for surface-mount applications in conference rooms, houses of worship, recording studios, live event venues, and sports arenas. The high-output condenser element yields a wide frequency response of 20 Hz to 20 kHz, which can be modified via the switchable 80 Hz low-cut filter—ideal for mitigating rumble and low-frequency buildup.

For Surface-Mount Applications    High-Output Condenser Element    Omnidirectional Polar Pattern    Picks up Sound from All Directions    Enhanced Rejection of RFI    20 Hz to 20 kHz Frequency Response    Switchable Low-Cut Filter at 80 Hz    Rotatable TB3M Output Connector    11 to 52 VDC Phantom Powered    Includes 25' TA3F to XLR Mic Cable

• Omnidirectional condenser boundary microphone
• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, and conferencing
• Spherical polar pattern picks up sound from all directions
• 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
• Separately available interchangeable elements permit angle of acceptance from 100° to 360°
• UniGuard RFI-shielding technology offers outstanding rejection of radio-frequency interference (RFI)
• Switchable 18 dB/octave UniSteep roll-off filter at 80 Hz
• Self-contained electronics eliminate need for external power module
• Powered via 11 to 52 VDC phantom power
• 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
• Balanced TB3M output connector
• Includes 25' TA3F to XLR male shielded microphone cable

Related Questions and Answers

Q: 1. Is anyone using 2 of these simultaneously with the tascam dr-40 and if so, does the phantom power from the tascam do ok? How long can you record with a new set of batteries? Thanks

A: I do not own a Tascam dr-40, but we used 2 of these with phantom power from a Canon XA-10 and they worked well. It may be a decent alternative to a bunch of lav mics and a mixing board.

Q: 2. I'm a little confused about their statement Self-contained electronics eliminate need for external power modules . It IS a condenser mic. I am assuming it still requires phantom power. Would the 12v phantom power from a typical shure mic mixer provide adequate performance?

A: It is a 48volt phantom powered mic. Whether or not it can work on 12 volts can be answered by reading the spec on the AT web site.

Q: 3. Would this mic work for people sitting 4 or 5 feet away? Any idea of the distance this could cover?

A: Yes, the MXBM-621/O can capture audio from people speaking who are 4 to 5 feet apart. The distance for coverage will vary depending on the environment where the mic is being used. The omnidirectional pattern picks up sound from 360 degrees and works best in quiet environments. Mics of this nature are often used for conferences and meetings. The mic is placed in the center of a table and picks up the voices of participants seated around the table.

Q: 4. Is this mic compatible with the Canon XA40?

A: Yes, the Senal MXBM-621/O is compatible for use with the Canon XA40.

Q: 5. Can you recommend a preamp/power supply for this mic? I don't need a mixer as I plan to feed the mic into an ATEM mini with an adapter

A: You can use the Rolls MP13 Mini-Mic Preamp (B&H # ROMP13) to power the Audio-Technica U851Rb Cardioid Condenser Boundary Microphone, then use an XLR female to 3.5mm TRS male cable like the Kopul XRSM 3-Pin XLR Female to 3.5mm RA Stereo Mini-Plug Cable - 3' (B&H # KOXRSM03B) to connect the output from the MP13 to the 3.5mm TRS input on the Blackmagic Design ATEM Mini HDMI Switcher.

Q: 6. is connector swivel ?

A: The connector is a 3 pin XLR and it does not swivel.

Q: 7. Will this mic work on a DSLR?

A: Yes. I use it with a DSLR as well as a basic consumer level camcorder. Youll need a 3.5mm to 3-Pin XLR Female adapter cable though.

Q: 8. Does this mic come in a wireless version?

A: This mic is not available in a wireless version.

Q: 9. Will this work on a Chromebook?

A: Yes, the ATR4650-USB microphone will work on a Chromebook.

Q: 10. Does the microphone mute?

A: There is no mute control.