Shure MX391 - Preamp Gain; Specifications

Shure Incorporated
5/7
5. Replace grille with screw. Do not overtighten.
Do not attempt to detach the cable from the microphone, as damage may result.
Preamp Gain
If necessary, the preamplifier gain can be reduced by 12 dB. Contact an authorized Shure service center for information.
Specifications
All measurements taken with microphone mounted on a wooden surface (76 x 76 cm)
Type
Electret Condenser
Frequency Response
50–17000 Hz
Polar Pattern
MX391/C Cardioid
MX391/S Supercardioid
MX391/O Omnidirectional
Output Impedance
180 Ω
Output Configuration
Active Balanced
Sensitivity
@ 1 kHz, open circuit voltage
Cardioid –30 dBV/Pa(33.5 mV)
Supercardioid –28 dBV/Pa(38.5 mV)
Omnidirectional –22 dBV/Pa(81.4 mV)
1 Pa=94 dB SPL
Maximum SPL
1 kHz at 1% THD, 1 kΩ load
Cardioid 119 dB
Supercardioid 118 dB
Omnidirectional 111 dB