The Audio-Technica U891Rb is a cardioid condenser boundary microphone with a built-in touch-sensitive capacitive switch, designed for conferencing and boardroom installations. It features three switchable operating modes (touch on/off, touch to talk, touch to mute), a two-state RGB LED status indicator and a PivotPoint rotating output connector for flexible cable routing.
Polar Pattern
Cardioid
Half-space
Switch Modes
3 Modes
On/Off, Talk, Mute
Low-Cut Filter
80 Hz
UniSteep filter
Finish
Black
Features
✓
Touch-sensitive capacitive switch with three operating modes
Touch-sensitive capacitive switch with three operating modes
✓
Two-state RGB LED status indicator
Two-state RGB LED status indicator
✓
PivotPoint rotating output connector — no tools required
PivotPoint rotating output connector — no tools required
✓
UniGuard RFI-shielding for unsurpassed RF immunity
UniGuard RFI-shielding for unsurpassed RF immunity
✓
80 Hz UniSteep low-cut filter reduces low-frequency ambient noise
80 Hz UniSteep low-cut filter reduces low-frequency ambient noise
✓
Accepts interchangeable elements (hypercardioid, omnidirectional available separately)
Accepts interchangeable elements (hypercardioid, omnidirectional available separately)
✓
Heavy die-cast case with silicon foam pads minimises surface vibration coupling
Heavy die-cast case with silicon foam pads minimises surface vibration coupling
✓
Threaded inserts on base for screw-down mounting
Threaded inserts on base for screw-down mounting
✓
Phantom powered — self-contained electronics, no external power module needed
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) |
| Low-Cut Filter | 80 Hz UniSteep |
| Power Requirements | 11–52V DC phantom power |
| Interchangeable Elements | Yes — hypercardioid, omnidirectional (sold separately) |
| Finish | Black |
