The Audio-Technica U891RCb is a cardioid condenser boundary microphone with both local and remote switching capability, designed for conference and boardroom installations requiring enhanced control. Its touch-sensitive capacitive switch supports three operating modes, while external contact closure capability allows the microphone’s switch to trigger external devices such as cameras.
Cardioid
Polar Pattern · Half-space
3 Modes
Switch Modes · On/Off, Talk, Mute
Yes
Remote Control · Contact closure + LED control
80 Hz
Low-Cut Filter · UniSteep filter
Features
Touch-sensitive capacitive switch with three local operating modes
External contact closure for triggering cameras or other devices
Two-state RGB LED status indicator with remote control
PivotPoint rotating connector, changes cable exit point without tools
UniGuard RFI-shielding for unsurpassed RF immunity
80 Hz UniSteep low-cut filter reduces low-frequency ambient noise
Accepts interchangeable elements (hypercardioid, omnidirectional available separately)
Heavy die-cast case with silicon foam pads and screw-down mounting inserts
Phantom powered, self-contained electronics, no external power module needed
Specifications
| Element | Condenser |
| Polar Pattern | Cardioid (half-space) |
| Switch Type | Touch-sensitive capacitive (3 modes) with remote contact closure |
| Low-Cut Filter | 80 Hz UniSteep |
| Power Requirements | 11-52V DC phantom power |
| Interchangeable Elements | Yes, hypercardioid, omnidirectional (sold separately) |
| Finish | Black |





