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Audio-Technica Cardioid Condenser Boundary Microphone

Model #: U891RWb
342926
Audio-Technica
At a Glance

Designed to deliver easy, flexible control in conference and boardroom installations, the versatile U891RWb cardioid condenser boundary microphone features a touch-sensitive capacitive-type user switch that can be set to three modes: touch on/off, touch to talk, and touch to mute.

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Get to know this product.

Designed to deliver easy, flexible control in conference and boardroom installations, the versatile U891RWb cardioid condenser boundary microphone features a touch-sensitive capacitive-type user switch that can be set to three modes: touch on/off, touch to talk, and touch to mute. The phantom-powered microphone is equipped with a unique PivotPoint® rotating output connector and a two-state RGB LED status indicator. UniGuard® innovations offer unsurpassed immunity from radio frequency interference; additional interchangeable elements are available separately in hypercardioid and omnidirectional polar patterns; an 80 Hz low-cut UniSteep® filter reduces pickup of low-frequency ambient noise. The microphone’s heavy die-cast case and silicon foam bottom pads minimize coupling of surface vibration to the microphone, while threaded inserts on the bottom of the microphone allow it to be mounted with screws for increased security. The unit’s self-contained electronics eliminate the need for an external power module.

  • Cardioid condenser boundary microphone with touch-sensitive capacitive-type user switch
  • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
  • The capacitive touch switch can be set to any of three operating modes: touch on/off, touch to talk and touch to mute
  • Integral, phantom-powered, two-state RGB LED indicator displays on/off status of microphone
  • 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: white (U891RWb) and black (U891Rb)
Useful Documents
Specifications

General

ElementFixed-charge back plate, permanently polarized condenser
Polar PatternCardioid
Frequency Response20-20,000 Hz
Low Frequency Roll-Off80 Hz, 18 dB/octave
Open Circuit Sensitivity-34 dB (19.9 mV) re 1V at 1 Pa
Impedance50 ohms
Maximum Input Sound Level130 dB SPL, 1 kHz at 1% T.H.D.
Dynamic Range (Typicals)104 dB, 1 kHz at Max SPL
Signal-To-Noise Ratio68 dB, 1 kHz at 1 Pa, A-weighted
Phantom Power Requirements11-52V DC, 9.3 mA
SwitchesActivation: on/off, Switch function: touch on/off, momentary on, momentary off, LED Color: mic on, mic off, Flat, roll-off
Weight253 g (8.9 oz)
Dimensions0.91" (23.0 mm) H x 3.30" (83.9 mm) W x 4.25" (108.0 mm) D
Output ConnectorMicrophone: TB3M-type, Cable: 3-pin XLRM-type
Cable25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM connectors
Optional Interchangeable ElementsUE-H hypercardioid (100°), UE-O omnidirectional (360°)
Accessory FurnishedSoft protective pouch

Misc. Specs

Manufacturer Warranty2 Year
WarningProposition 65 Warning for California Residents