Specifications; Furnished Accessories; Replacement Parts - Shure Microflex MX391 Series Specifications

Specifications

Type
Condenser (electret bias)
Frequency Response
50–17000 Hz
Polar Pattern
MX391/O: Omnidirectional
MX391/C: Cardioid
MX391/S: Supercardioid
Output Impedance
EIA Rated at 150 Ω (180 Ω actual)
Output Configuration
Active balanced
Sensitivity (at 1 kHz , open circuit voltage)
Cardioid: –30 dBV/Pa (33.5 mV)
Omnidirectional: –22 dBV/Pa (81.4 mV)
Supercardioid: –28 dBV/Pa (38.5 mV)
1 Pascal=94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1 kΩ load)
Cardioid: 119 dB
Omnidirectional: 111 dB
Supercardioid: 118 dB
Equivalent Output Noise (A-weighted)
Cardioid: 23 dB SPL
Omnidirectional: 15 dB SPL
Supercardioid: 21 dB
Signal-to-Noise Ratio (referenced at 94 dB
SPL at 1 kHz)
Cardioid: 71 dB
Omnidirectional: 80 dB
Supercardioid: 73 dB
Dynamic Range (1 kΩ load at 1 kHz)
96 dB
Common Mode Rejection (10 Hz–100 kHz)
45 dB minimum
Preamplifier Output Clipping Level (1% THD)
–6 dBV (0.5 V)
Polarity
Positive sound pressure on diaphragm produces
positive voltage on pin 2 relative to pin 3 of out-
put XLR connector.
Logic Connections
LED IN: Active low (≤1.0V), TTL compatible.
Absolute maximum voltage: -0.7V to 50V.
Environmental Conditions
Operating Temperature: -18–57 °C (0–135 °F)
Storage Temperature: -29–74 °C (-20–165 °F)
Relative Humidity: 0–95%
Power Requirements
11–52 Vdc phantom, 2.0 mA

Furnished Accessories

Zipper Bag
In-Line Preamplifier (Black)
Hex Wrench #4

Replacement Parts

Omnidirectional Cartridge (Black)
Supercardioid Cartridge (Black)
Cardioid Cartridge (Black)
In-Line Preamplifier (Black)
In-Line Preamplifier (White)
CERTIFICATION
Eligible to bear CE Marking. Conforms to
European EMC Directive 2004/108/EC. Meets
Harmonized Standards EN55103-1:1996 and
EN55103-2:1996, for residential (E1) and light
industrial (E2) environments.
The Declaration of Conformity can be obtained
from:
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Wannenacker Str. 28
D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: EMEAsupport@shure.de
95B2313
RK100PK
80A67
R183B
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