Equipped with features like programmable, silent membrane switches, logic inputs and outputs, and LED indicators, Microflex® Boundary Microphones are the high-quality solution for a range of applications such as altars, boardrooms and distance learning centers. Every Microflex Boundary microphone features a choice of interchangeable condenser cartridges.
MX391: Includes attached 4 meter (12 ft) cable terminated with a 4-pin mini connector and separate preamplifier. A rubber strain relief is provided for applications that require removing the 4-pin mini connector and connecting the mic cable directly to screw terminals in the preamplifier.
Shure MX391/C Features
- Flat frequency response across the vocal range for uncolored sound
- Interchangeable cardioid, supercardioid, and omnidirectional cartridges that provide optimal choice for each application
- Sleek, low-profile design for unobtrusive appearance
- Balanced, transformerless output for increased immunity to noise over long cable runs
- MX391/C Microflex boundary microphone1
- 12 ft cable with 4-pin mini connector and in-line preamp1
- Rubber strain relief1
- Transducer TypeCondenser
- Polar PatternCardioid
- Frequency Response50 Hz - 17 kHz
- Rated Output Impedance150 ohms (180 ohms actual)
- Sensitivity-29.5 dB (33.5 mV)
- Max. SPL (1 kHz at 1% THD, 1 kΩ load; All settings +6 dB at 0 gain (internal modification))118.8 dB
- Equivalent Output Noise (A-weighted)22.6 dB SPL
- Signal-to-Noise Ratio (referenced at 94 dB SPL at 1kHz)71.4 dB SPL
- Dynamic Range (1kΩ load at 1kHz)96.2 dB
- Preamp Output Clipping Level (1% THD)-6dBV (0.5V)
- Power Requirements11-52 VDC phantom, 2.0mA
