Shure MX391 Microflex Boundary Condenser Microphone

RM1,296.00

Interchangeable Microflex Capsules — Choose Cardioid, Omnidirectional or Supercardioid pickup for different coverage requirements.
Low-Profile Boundary Design — Compact housing sits discreetly on conference tables, lecterns, stages and other flat surfaces.
RK100PK In-Line Preamplifier Included — Provides balanced XLR output and enhanced RF immunity.
Flat Vocal-Range Response — Designed for clear, natural speech and vocal reproduction without excessive coloration.
Permanent-Mount Capability — Can be securely installed into a table, lectern or other surface when required.

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Shure MX391 Microflex Boundary Condenser Microphone

The Shure MX391 Microflex Boundary Condenser Microphone provides clear, natural speech and vocal reproduction in a compact, low-profile design for conference tables, lecterns, stages, houses of worship, classrooms, and installed sound applications.

Featuring interchangeable Microflex condenser cartridges, an RFI-resistant in-line preamplifier, and balanced output, the MX391 delivers reliable professional performance while remaining discreet on any surface. Choose from Cardioid, Omnidirectional, or Supercardioid pickup patterns to suit different coverage and isolation requirements.

Specifications

Specification	MX391/C	MX391/O	MX391/S
Microphone Type	Electret Condenser Boundary	Electret Condenser Boundary	Electret Condenser Boundary
Pickup Pattern	Cardioid	Omnidirectional	Supercardioid
Frequency Response	50 Hz–17 kHz	50 Hz–17 kHz	50 Hz–17 kHz
Sensitivity	-30 dBV/Pa (33.5 mV/Pa)	-22 dBV/Pa (81.4 mV/Pa)	-28 dBV/Pa (38.5 mV/Pa)
Maximum SPL	119 dB SPL	111 dB SPL	118 dB SPL
Self-Noise	23 dB SPL-A	15 dB SPL-A	21 dB SPL-A
Signal-to-Noise Ratio	71 dB	80 dB	73 dB
Dynamic Range	96 dB	96 dB	96 dB
Output Impedance	180 Ω	180 Ω	180 Ω
Output Configuration	Active Balanced	Active Balanced	Active Balanced
Preamplifier	RK100PK In-Line Preamp	RK100PK In-Line Preamp	RK100PK In-Line Preamp
Audio Output	3-Pin XLR Male via In-Line Preamp	3-Pin XLR Male via In-Line Preamp	3-Pin XLR Male via In-Line Preamp
Cable Length	Approx. 4 m / 12 ft	Approx. 4 m / 12 ft	Approx. 4 m / 12 ft
Power Requirement	11–52 V DC Phantom Power, 2 mA	11–52 V DC Phantom Power, 2 mA	11–52 V DC Phantom Power, 2 mA
Microphone Dimensions	79.4 × 53.0 × 19.1 mm	79.4 × 53.0 × 19.1 mm	79.4 × 53.0 × 19.1 mm
Weight	126 g	126 g	126 g
Color	Black	Black	Black
Recommended Applications	Conference Tables, Lecterns, Speech & General Boundary Pickup	Group Discussions, Meetings & Wide-Area Pickup	Focused Speech, Lecterns & Applications Requiring Greater Isolation
Included Accessories	RK100PK In-Line Preamp, Carrying Bag & Allen Wrench	RK100PK In-Line Preamp, Carrying Bag & Allen Wrench	RK100PK In-Line Preamp, Carrying Bag & Allen Wrench