Shure MX391 Bedienungsanleitung
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Printed in U.S.A.
www.shure.com
© 2009 Shure Incorporated
27A14048 (Rev. 1)
MX391 Series
MX391
2
Shure Microflex® MX391 Series microphones
are small, surface-mounted electret condenser
microphones designed for mounting on confer-
ence tables, stage floors, and lecterns. Their
high sensitivity and wide frequency range make
them especially suitable for picking up speech
and vocals in sound reinforcement and recording
applications.
Features
• Flat frequency response across the vocal range
for uncolored sound
• Interchangeable cartridges that provide a
choice of polar pattern for each application
• Sleek, low-profile design for unobtrusive
appearance
• RF filtering
Model Variations
Microflex MX391 microphones are available in
black or white.
The polar pattern of the included cartridge is indi-
cated by a model number suffix:
/C Cardioid
/S Supercardioid
/O Omnidirectional
Interchangeable Cartridges
Microflex microphones
use interchangeable car-
tridges that allow you to
choose the polar pattern
for different installations.
Surface Mount
Microphones
R183 Omnidirectional
R184 Supercardioid
R185 Cardioid
Microphone Placement
For best low-frequency response and rejection
of background noise, place the microphone on
a large, flat surface, such as a floor, table, or
lectern.
To reduce reverberance, avoid reflective surfaces
above or to the side of the microphone, such as
beveled sides of pulpits or overhanging shelves.
PREAMP
Preamp Gain
If necessary, the preamplifier gain can be reduced
by 12 dB. Contact an authorized Shure service
center for information.
RFI Filtering
Important: Microphones must be used with the
RK100PK preamp to optimize RF immunity.
Permanent Installation
1. Remove grille.
2. Place housing in position and mark location of
screw holes and bottom cable exit hole.
3. Drill starter hole for each screw and a 1/2 in.
bottom exit hole for the mic cable.
4. Insert 4-pin mini-connector and cable through
cable hole.
5. Replace grille with screw. Do not overtighten.
Do not attempt to detach the cable from the mi-
crophone, as damage may result.
3
Specifications
Replacement Parts
Omnidirectional Cartridge (Black) R183B
Supercardioid Cartridge (Black) R184B
Cardioid Cartridge (Black) R185B
In-Line Preamplifier (Black) RK100PK
In-Line Preamplifier (White) RK100PKW
Furnished Accessories
Zipper Bag 95B2313
In-Line Preamplifier (Black) RK100PK
Hex Wrench #4 80A67
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
Type
Condenser (electret bias)
Frequency Response
50–17000 Hz
Polar Pattern
MX391/O: Omnidirectional
MX391/C: Cardioid
MX391/S: Supercardioid
Output Impedance
EIARatedat150Ω(180Ωactual)
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: Activelow(≤1.0V),TTLcompatible.
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
Produktspezifikationen
| Marke: | Shure |
| Kategorie: | Mikrofon |
| Modell: | MX391 |
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