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Shure Shure MX391 Microflex Boundary Microphone
Equipment Sales & Professional Installation
MPN: SHURE-MX391
- Flat frequency response across the vocal range for uncolored sound
- Interchangeable cardioid, supercardioid and omnidirectional cartridges
- Your choice of black or off-white
- Sleek, low-profile design for unobtrusive appearance
- Balanced, transformerless output for increased immunity to noise over long cable runs
Specifications
Pickup Angle
| Cardioid | (–3 dB) = 130 ° |
|---|---|
| Supercardioid | (–3 dB) = 115 ° |
| Omnidirectional | = 360 ° |
Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 k ohm load)
| Cardioid | 118.8 dB |
|---|---|
| Supercardioid | 117.5 dB |
| Omnidirectional | 110.7 dB |
Signal to Noise Ratio (referenced at 94 dB SPL)
| Cardioid | 71.4 dB |
|---|---|
| Supercardioid | 72.7 dB |
| Omnidirectional | 79.5 dB |
Equivalent Output Noise (A-weighted)
| Cardioid | 22.6 dB SPL |
|---|---|
| Supercardioid | 21.3 dB SPL |
| Omnidirectional | 14.5 dB SPL |
Open Circuit Sensitivity 1 kHz ref. 1 V per Pascal
| Cardioid | –29.6 dB (33.5 mV) |
|---|---|
| Supercardioid | –28.3 dB (38.5 mV) |
| Omnidirectional | –21.5 dB (81.4 mV) |
| Dimensions (H x W x D) | 2.09" (5.3 cm) x 3.13" (7.9 cm) x 0.75" (1.9 cm) |
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