Shure MX391/C Microflex Boundary Cardioid Microphone

Shure MX391/C Microflex Boundary Cardioid Microphone

The Shure Microflex Boundary MX391 Cardioid Boundary Microphone is designed to deliver clear and intelligible speech capture for installed conferencing applications. Its low profile boundary design allows for discreet placement while maintaining consistent vocal pickup across meeting spaces.

This microphone features a flat frequency response across the vocal range for natural and uncolored sound reproduction. The cardioid pickup pattern helps focus on desired sound sources while reducing ambient room noise, making it ideal for boardrooms, classrooms, and fixed installation environments.

Built for professional installations, the MX391 uses a balanced transformerless output for increased immunity to noise over long cable runs. The included cable and separate preamplifier support reliable integration into permanent audio systems where speech clarity and consistency are critical.

Key Features

• Cardioid Pickup Pattern: Focused directional response designed to capture speech while reducing ambient noise.
• Flat Vocal Response: Flat frequency response across the vocal range for clear and natural sound.
• Low Profile Boundary Design: Sleek, unobtrusive form factor for table and surface placement.
• Transformerless Output: Balanced transformerless output for increased immunity to noise over long cable runs.
• Installed Application Ready: Designed for boardrooms, altars, classrooms, and distance learning centers.

Technical Specifications

Microphone Type
Boundary microphone

Pickup Pattern
Cardioid

Transducer Type
Condenser

Frequency Response
Flat frequency response across the vocal range

Output Type
Balanced, transformerless output

Cable Length
4 meter (12 ft)

Connector Type
4 pin mini connector

Color
Black

What’s in the Box

Shure Microflex Boundary MX391 Cardioid Boundary Microphone
Attached 4 meter 12 ft cable terminated with a 4 pin mini connector
Separate preamplifier
Rubber strain relief