Shure MX391/O Microflex Boundary Microphone

Optimize room audio and security monitoring with the Shure MX391 boundary microphone, a compact surface-mounted pro microphone engineered for clear speech capture in conferencing, recording and surveillance environments. The electret condenser boundary design provides wide, consistent omnidirectional coverage so presenters and participants are heard clearly from any position, reducing dead spots and the need for repositioning. With a frequency response of 50 Hz–17 kHz and high sensitivity, the MX391 preserves vocal nuances for accurate speech reinforcement and recording while minimizing background noise. Professional XLR connectivity and a 12' cable deliver stable, low-noise integration into AV consoles, DSPs and security monitoring systems. Its low-profile, durable housing mounts inconspicuously on tables, lecterns or floors—perfect for conference rooms, courtrooms, houses of worship and surveillance setups where appearance and reliability matter. Backed by Shure's Microflex engineering and a 2-year warranty, the MX391 is a practical choice for integrators and IT teams deploying pro audio and security monitoring solutions. Add the Shure MX391 to your AV or security system today to improve intelligibility and dependable room coverage.

• Low-profile surface-mount design for discreet installation on conference tables, lecterns or stage floors
• Omnidirectional electret condenser pickup that captures clear, consistent speech across a room for reliable monitoring and conferencing
• Wide 50 Hz–17 kHz frequency response to preserve voice clarity and natural speech intelligibility for recordings and sound reinforcement
• Wired XLR connectivity and 12' cable for secure, low-noise integration with professional AV and security systems
• Durable construction and 2-year warranty ensure long-term performance for corporate, courtroom, and surveillance applications