Shure MX391 Microflex Omnidirectional Boundary Microphone (Black)

The Shure MX391/O is a boundary microphone developed to capture speech clearly in modern meeting rooms, lecture halls, and worship spaces.

It uses a condenser capsule that provides an omnidirectional pickup pattern, so every voice around the table can be heard at a consistent level without forcing participants to lean in.

The housing sits low on a desk, podium, or stage and stays out of camera frames and sight lines, which helps keep attention on the speaker during video conferences or live presentations.

An inline preamplifier and balanced XLR connector allow straightforward integration with mixers, DSP processors, and PA systems, while 11 to 52 volt phantom power eliminates the need for external adapters.

When room acoustics or seating layouts change, you can swap the supplied capsule for cardioid or supercardioid versions from the Microflex line, extending the life of the microphone without buying new hardware.

These practical design choices, combined with Shure reliability, make the MX391/O a dependable solution for boardrooms, council chambers, classrooms, and houses of worship.

Highlights:

• Boundary microphone with a condenser capsule set for omnidirectional pickup
• Low profile housing that remains unobtrusive in live or video environments
• Accepts interchangeable cardioid, supercardioid, and omnidirectional capsules
• Inline preamp and balanced XLR output for professional audio connections
• Operates on standard 11 to 52 V phantom power
• 50 Hz to 17 kHz frequency response tailored for natural speech