Shure SM137 User manual

©2009 Shure Incorporated Printed in U.S.A.
27A12629 (Rev. 1)
CARDIOID CONDENSER MICROPHONE
MICROPHONE ÉLECTROSTATIQUE CARDIOÏDE
NIEREN-KONDENSATORMIKROFON
SM137
MICROFONO DE CONDENSADOR DE CARDIOIDE
MICROFONO CARDIOIDE A CONDENSATORE
カーディオ イド コンデンサー型マ イクロホン
Wired Microphones
SM137

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PERFORMANCE CHARACTERISTICS
Extended frequency response•
Low self-noise•
Exceptional low-frequency reproduction•
Can withstand high sound pressure levels (SPLs)•
High output level•
No crossover distortion•
Uniform polar response•
Superior common mode rejection and suppression of radio frequency•
interference (RFI)
APPLICATIONS
Electric guitar amplifiers•
Brass and woodwind instruments•
Orchestras, choirs, and wind ensembles•
Overhead miking of drums and percussion instruments•
Close-miking of acoustic instruments such as piano, guitar, violins, drums, and•
percussion
Low-frequency instruments such as double bass and kick drum•
Room ambience pick-up (guitar amplifier or drums)•
Note: Sound quality is strongly affected by microphone location and room acous-
tics. To achieve the best overall sound for a particular application, it may be neces-
sary to experiment with microphone placement and room treatments.
Mounting the Microphone
Thread the supplied stand adapter onto a floor or boom stand and insert the
microphone.
NOTE: Since this microphone reproduces ultra-low frequencies, use an isolating
shock mount (available at www.shure.com) to reduce low-frequency mechanical
vibrations transmitted through the stand.
Setting Attenuation
The attenuation switch lets you reduce the signal level without altering the fre-
quency response. This can prevent extremely loud sounds from overloading the
microphone.
0 dB For “quiet” to “normal” sound levels.
-15 dB For use with extremely loud sound sources such as drums, horns, or loud
guitar cabinets.
Integral Pop Filter
The microphone grille consists of 3 separate mesh layers that act as an integral
pop filter. This helps reduce wind and breath noise. Depending on the performer,
an external pop-protection screen or windscreen may be necessary when close-
miking vocalists.
Load Impedance
Maximum SPL capability, output clipping level, and dynamic range varies with the
input load impedance of the preamplifier to which you connect the microphone.
Shurerecommendsaminimuminputloadimpedanceof1000Ω,andmostmodern
microphone preamplifiers meet this requirement. Higher impedance results in bet-
ter performance for these specifications.
Power Requirements
This microphone requires phantom power and performs best with a 48 Vdc supply
(IEC-268-15/DIN 45 596). However, it will operate with slightly decreased head-
room and sensitivity with supplies as low as 11 Vdc. Most modern mixers provide
phantom power. Phantom power can only be transmitted through a cable termi-
nated with XLR connectors at each end.
GENERAL DESCRIPTION
The Shure® SM137 is a versatile, flat-response cardioid probe microphone with an
ultra-thin diaphragm. Its frequency response combines smooth high-end and tight,
controlled low-end. A 15 dB pad provides natural, consistent sound reproduction in
both acoustic and high-volume performance applications.
FEATURES
Cardioid polar pattern to reduce the pickup of unwanted sounds•
Ultra-thin,2.5μm24karatgold-layered,lowmassMylar• ®diaphragm for
superior transient response
Class A, discrete, transformerless preamplifier for transparency, extremely•
fast transient response, no crossover distortion, and minimal harmonic and
intermodulation distortion
Premium electronic components, including gold-plated internal and external•
connectors
Two-position switchable pad (0 dB and 15 dB) for handling extremely high•
sound pressure levels (SPLs)

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SPECIFICATIONS 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 residen-
tial (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: [phone]
Fax: [phone]
Email: [email protected]
ACCESSORIES AND PARTS
Furnished Accessories
Storage Bag 95C2313
Windscreen A3WS
Swivel Stand Adapter A25D
Optional Accessories
Shock Stopper™ Isolation Mount A55M, A55HM
Popper Stopper™ PS-6
Type Electret Condenser
Frequency Response 20 to 20,000 Hz
Polar Pattern Cardioid
Output Impedance 150Ω(actual)
Sensitivity
(at 1 kHz, open circuit
voltage)
−41dBV/Pa
1 Pascal=94 dB SPL
Maximum SPL
(1 kHz at 1% THD)
1000 Ω load: 139 dB (154 dB, Pad on)
2500 Ω load: 144 dB (159 dB, Pad on)
Signal-to-Noise Ratio
(referenced at 94 dB
SPL at 1 kHz)
75 dB
S/N ratio is difference between 94 dB SPL and
equivalent SPL of self noise, A-weighted
Dynamic Range
(at 1 kHz)
1000 Ω load: 122 dB
2500 Ω load: 128 dBV
Common Mode
Rejection
(10 Hz to 100 kHz)
> 50 dB
Clipping Level
(20Hz-20 kHz at 1%
THD)
1000 Ω load: 3 dBV
2500 Ω load: 9 dBV
THD of microphone preamplifier when applied input
signal is equivalent to cartridge output at specified
SPL
Self Noise
(typical, equivalent SPL,
A-weighted)
19 dB
Polarity Positive pressure on diaphragm produces positive
voltage on pin 2 with respect to pin 3
Weight Net: 195 g (6.9 oz.)
Switch Attenuator: −15dB
Connector Three-pin professional audio (XLR), male
Power Requirements 48 Vdc phantom, 5.2 mA

(0.950 in.)
24 mm
162 mm
(6.375 in.)
OVERALL DIMENSIONS – DIMENSIONS HORS TOUT
GESAMTABMESSUNGEN–DIMENSIONESTOTALES–DIMENSIONITOTALI–寸法
TYPICAL POLAR PATTERNS
COURBE DE DIRECTIVITE TYPIQUES - TYPISCHE POLARCHARAKTERISTIK
PATRONES DE CAPTACION POLAR TIPICOS - TIPICI DIAGRAMMI POLARI
指向特性
TYPICAL FREQUENCY RESPONSE
COURBE DE REPONSE TYPIQUE - TYPISCHES FREQUENZVERHALTEN
RESPUESTA DE FRECUENCIA TIPICA - TIPICA RISPOSTA IN FREQUENZA
周波数特性

www.shure.com
United States:
Shure Incorporated
5800 West Touhy Avenue
Niles, IL 60714-4608 USA
Phone: [phone]
Fax: [phone]
Email: [email protected]
©2009 Shure Incorporated
Europe, Middle East, Africa:
Shure Europe GmbH
Wannenäckestr. 28,
74078 Heilbronn, Germany
Phone: [phone]
Fax: [phone]
Email: [email protected]
Asia, Pacific:
Shure Asia Limited
Unit 301, 3rd Floor
Citicorp Centre
18, Whitfield Road
Causeway Bay, Hong Kong
Phone: [phone]
Fax: [phone]
Email: [email protected]
Canada, Latin America,
Caribbean:
Shure Incorporated
5800 West Touhy Avenue
Niles, IL 60714-4608 USA
Phone: [phone]
Fax: [phone]
Email: [email protected]