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USER MANUAL MX391 SHURE
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Product photo of a SURE device with three labeled parts (no visible text or symbols)MX391
Surface Mount Microphones
Shure Microflex ^® MX391 Series microphones are small, surface-mounted electret condenser microphones designed for mounting on conference 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 indicated by a model number suffix:
/C Cardioid
/S Supercardioid
/0 Omnidirectional
Interchangeable Cartridges
Microflex microphones use interchangeable cartridges that allow you to choose the polar pattern for different installations.
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Line drawing of a hand pressing down on a mechanical component (no text or symbols)
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.
Permanent Installation
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Pure technical diagram of a mechanical component with mounting holes and internal structure (no text or symbols)- Remove grille.
- Place housing in position and mark location of screw holes and bottom cable exit hole.
- Drill starter hole for each screw and a 1/2 in. bottom exit hole for the mic cable.
- Insert 4-pin mini-connector and cable through cable hole.
- Replace grille with screw. Do not overtighten. Do not attempt to detach the cable from the microphone, as damage may result.
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.
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 output 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 95B2313 | |
| In-Line Preamplifier (Black) RK100PK | |
| Hex Wrench #4 80A67 |
Replacement Parts
| Omnidirectional Cartridge (Black) R183B | |
| Supercardioid Cartridge (Black) R184B | |
| Cardioid Cartridge (Black) R185B | |
| In-Line Preamplifier (Black) RK100PK | |
| In-Line Preamplifier (White) RK100PKW |
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
MX391
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360° R183 Omnidirectionnelle
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Technical line drawing of a mechanical component with mounting holes and a central cylindrical part (no text or symbols)11–52 V c.c. fantôme, 2,0 mA
Accessoires fournis
D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: EMEAsupport@shure.de
MX391
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R183 Kugelcharakteristik
R184 Supernierencharakteristik
R185 Nierencharakteristik
Mikrofonaufstellung
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Simple line drawing of a mechanical component with two mounting holes and a central cylindrical feature (no text or symbols)11–52 V DC Phantomspeisung, 2,0 mA
Headquarters Europe, Middle East & Africa
D-74078 Heilbronn, Germany
Tel: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: EMEAsupport@shure.de
MX391
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Line drawing of two abstract architectural or mechanical components with no visible text or symbols
R183 omnidireccional
R184 supercardioide
R185 cardioide
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Pure technical diagram of a mechanical component with mounting holes and a central cylindrical feature (no text or symbols)D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: EMEAsupport@shure.de
MX391
natural_image
Line drawing of a hand pressing down on a mechanical component (no text or symbols)natural_image
Pure technical diagram of a mechanical component with mounting holes and internal structure (no text or symbols)D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Email: EMEAsupport@shure.de
MX391
表面取付けマイクロホン
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Line drawing of a hand pressing down on a mechanical component (no text or symbols)
R183 無指向性
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Pure technical diagram of a mechanical component with mounting holes and internal cavity (no text or symbols)D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
Fax: +49 7131 72 14 14
Eメール：EMEAsupport@shure.de
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TA4F G D S TA4M RK100PK XLR
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Diagram showing a device with a circular inset view and its internal structure, including a schematic diagram of the device's internal components.
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R6 and R4 C10 Q8 C3 Q3 Q2 D1 Q9 C8 Q7 Q6 Q4 Q1 C5 Q5 C11 R13 and R16| GAIN SETTING | ||
| 12 dB | 0 dB | |
| R6 | 10k | 0 Ω |
| R4 | 10k | 20k |
| R16 | 0 Ω | 10M |
| R13 | DNP | 301 Ω |
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1.905 cm (.750 in.) 7.940 cm (3.126 in.) 5.304 cm (2.088 in.) cm4.158 (1.637 in.) 2.921 cm (1.150 in.) .5 in. Hole 3.175 cm (1.250 in.)O
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| Hz | dB | | -------- | ---- | | 20 | -2 | | 2000001000 | -1 | | 1000050 | 0 | | 100 | 0 | | 9876543 | 0 | | 92 | 0 | | 8765432 | 5 | | 8765432 | 10 | | 8765432 | 15 | | 8765432 | 20 |
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| Angle | Frequency (Hz) | |---|---| | 0 | -20 | | 30° | -15 | | 60° | -10 | | 90° | -5 | | 120° | -2 | | 150° | -1 | | 180° | -0.5 | | 210° | -0.25 | | 240° | -0.1 | | 270° | -0.05 | | 300° | 0 | | 330° | 0.05 | | 360° | 0.1 |
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| Frequency (Hz) | Value (dB) | | -------------- | ---------- | | 20 | -5 | | 1000 | -2 | | 500 | 0 | | 100 | 1 | | 9876543 | 2 | | 92 | 3 | | 8765432 | 5 | | 8876543 | -5 |
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| Angle | Frequency (Hz) | |-------|----------------| | 0 | -20 dB | | 30° | -15 dB | | 60° | -10 dB | | 90° | -5 dB | | 120° | -10 dB | | 150° | -15 dB | | 180° | -20 dB |
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| Angle | Frequency (Hz) | |---|---| | 0 | 2500 | | 30° | 6300 | | 60° | 10000 | | 90° | 2500 | | 120° | 6300 | | 150° | 10000 | | 180° | 2500 |[Non-Text]
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| Frequency (Hz) | Value (dB) | | -------------- | ---------- | | 20 | -10 | | 20000 | -8 | | 10000 | -5 | | 500 | -2 | | 100 | 0 | | 9876543 | 0 | | 92 | 0 | | 8765432 | 0 | | 8765433 | 2 | | 8765434 | -5 |
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| Angle | 250 Hz (dB) | 500 Hz (dB) | 1000 Hz (dB) | |-------|-------------|-------------|--------------| | 0 | -5 | -10 | -15 | | 30 | -5 | -10 | -15 | | 60 | -5 | -10 | -15 | | 90 | -5 | -10 | -15 | | 120 | -5 | -10 | -15 | | 150 | -5 | -10 | -15 | | 180 | -5 | -10 | -15 |
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| Angle | 2500 Hz (dB) | 6300 Hz (dB) | 10000 Hz (dB) | |-------|--------------|--------------|---------------| | 0 | -5 | -10 | -15 | | 30 | -5 | -10 | -15 | | 60 | -5 | -10 | -15 | | 90 | -5 | -10 | -15 | | 120 | -5 | -10 | -15 | | 150 | -5 | -10 | -15 | | 180 | -5 | -10 | -15 |SHURE®
SHURE Incorporated http://www.shure.com
United States, Canada, Latin America, Caribbean:
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.
Phone: 847-600-2000
U.S. Fax: 847-600-1212
Intl Fax: 847-600-6446
Europe, Middle East, Africa:
Shure Europe GmbH, Phone: 49-7131-72140
Fax: 49-7131-721414
Asia, Pacific:
Shure Asia Limited, Phone: 852-2893-4290
Fax: 852-2893-4055
SHURE Incorporated http://www.shure.com
SHURE Incorporated http://www.shure.com
Estados Unidos, Canadá, Latinoamérica, Caribe:
SHURE Incorporated http://www.shure.com