Shure MX391/C Microflex Boundary Microphone (Cardioid)
Shure MX391/C Microflex Boundary Microphone (Cardioid) is backordered and will ship as soon as it is back in stock.
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Shure MX391/C Microflex Boundary Microphone (Cardioid)
The Shure MX391/C is a professional boundary condenser microphone from the Microflex series, designed for clear, focused speech capture in conference rooms, boardrooms, houses of worship, altars, and distance learning centers. It features a cardioid polar pattern that provides good off-axis rejection, helping to isolate the speaker’s voice while reducing background noise and feedback.
The low-profile design ensures a discreet, professional appearance on any surface. It includes a programmable silent membrane switch with multiple modes (push-to-talk, push-to-mute, push on/push off), LED indicator, and logic connections for integration with automatic mixing systems. CommShield Technology delivers superior RF rejection. A paint mask is provided for custom-color installations, and the microphone uses interchangeable condenser cartridges for flexibility.
| Feature | Benefit |
|---|---|
| Cardioid Polar Pattern | Good off-axis rejection and reduced background noise/feedback |
| Programmable Silent Membrane Switch | Offers push-to-talk, push-to-mute, or push on/push off modes with silent operation |
| LED Indicator | Provides clear visual status feedback |
| Logic Connections | Supports remote control and integration with automatic mixing systems |
| Low-Profile Boundary Design | Delivers discreet, professional appearance on surfaces |
| CommShield Technology | Reduces RF interference from mobile devices and wireless systems |
| Paint Mask Included | Facilitates custom color matching for installations |
| Interchangeable Cartridges | Allows easy change to other polar patterns if needed |
| Specification | Details |
|---|---|
| Microphone Type | Boundary Condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 50 Hz – 17 kHz |
| Sensitivity | –27.5 dBV/Pa (42.2 mV) at 1 kHz |
| Maximum SPL | 117 dB SPL (1 kHz at 1% THD) |
| Self Noise | 23 dB SPL-A (typical) |
| Output Impedance | 180 ohms |
| Connector | Miniature 4-pin connector (TA3F) with attached cable to male XLR |
| Power Requirement | 11–52 V DC phantom power, 2.0 mA |
| Cable | 3.7 m (12 ft) attached |
| Color | Black with paint mask for custom colors |
| Applications | Conference rooms, boardrooms, altars, distance learning centers |
| Aspect | Shure MX391/C | Shure MX393/C | Shure MX392/C |
|---|---|---|---|
| Polar Pattern | Cardioid | Cardioid | Cardioid |
| Switch/Logic | Programmable silent membrane with LED | Programmable silent membrane with LED | Programmable silent membrane with TTL logic |
| Cable/Connector | Attached cable with TA3F to XLR | Attached cable with TA3F to XLR | Attached unterminated cable with screw terminals |
| Primary Use | Standard boundary applications | Standard boundary applications | Standard boundary with full logic |
| Paint Mask | Included | Included | Not included |
| RF Rejection | CommShield | CommShield | CommShield |
FAQ
- What applications is the MX391/C best suited for? It is ideal for conference rooms, boardrooms, altars, and distance learning centers requiring clear speech capture from a low-profile boundary microphone.
- Does it require phantom power? Yes, it operates on standard 11–52 V DC phantom power.
- What switch modes are available? The programmable silent membrane switch supports push-to-talk, push-to-mute, push on/push off, and logic modes.
- What is the polar pattern? It features a cardioid pattern for good off-axis rejection.
- Does it support custom colors? Yes, it includes a paint mask for easy custom-color installations.
- Is it compatible with automatic mixers? Yes, the logic connections support integration with automatic mixing systems.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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