Shure KSM137 Manuel utilisateur

7/13/22, 10:44 AM

KSM137 User Guide

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KSM137

Instrument Microphone

Thank you for selecting the KSM series from Shure.

Over 90 years of audio experience has contributed to making this one of the finest

microphones available.

If you have any questions not answered in this guide, please contact Shure Applications

Engineering at 847-600-8440, Monday through Friday, from 8:00 am to 4:30 pm, CST. In

Europe, call 49-7262-92490. In Asia, call 852-2893-4290. Our web address is www.shure.com.

General Description

The KSM137 is a premium, end-address, condenser microphone with a cardioid polar

pattern engineered for highly critical studio recording and live sound productions. Its class

A, discrete, transformerless preamplifier provides extremely transparent sound capture, and

a three position switchable pad and low-cut filter allows for handling of extremely high

sound pressure levels (SPL) and controlled bass response. Versatile, durable, and precise, the

KSM137 is an outstanding microphone for both live and studio applications.

Features

A highly consistent cardioid polar pattern

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 inter-

modulation distortion

Premium electronic components, including gold-plated internal and external

connectors

Subsonic filter eliminates low frequency rumble (less than 17 Hz) caused by

mechanical vibration

Three-position attenuation switch (0 dB, 15 dB, and 25 dB) for handling extremely

high SPLs

Three-position low-frequency filter switch reduces stand vibration noise and

counteracts proximity effect

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KSM137 User Guide

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Performance Characteristics

Extremely uniform polar response

Extended frequency response

Minimal self-noise

Exceptional low-frequency reproduction

Able to withstand high SPLs

High output level

No crossover distortion

Superior common-mode rejection and suppression of radio frequency interference

(RFI)

Model Variations

This microphone can be purchased as a stereo pair (KSM137/SL STEREO). In addition to the

standard accessories, the stereo pair includes a stereo stand adapter (A27M) for mounting

two microphones on one stand.

Applications

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

Electric guitar and bass amplifiers

Vocals and speech

Room ambience

Note: Sound quality is strongly affected by microphone location and room

acoustics. To achieve the best overall sound for a particular application, it may be

necessary to experiment with microphone placement and room treatments.

Power Requirements

This microphone requires phantom power and performs best with a 48 Vdc supply (IEC-

61938). However, it will operate with slightly decreased headroom and sensitivity with

supplies as low as 11 Vdc.

Most modern mixers provide phantom power. You must use a balanced microphone cable:

XLR-to-XLR or XLR-to-TRS.

Mounting the Microphone

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Use the supplied microphone mount with floor or boom stands. Visit www.shure.com for

more mounting options:

To reduce the pickup of unwanted low-frequency mechanical vibrations, use an

isolating shock mount.

For stereo applications, use the optional Shure A27M Stereo Microphone Adapter.

Selecting Low-Frequency Response

A three-position switch on the back of the microphone lets you adjust the low-frequency

response. Use the low-frequency filter to reduce wind noise, room noise, or proximity effect.

Flat response. Provides the most natural sound in most applications.

Low frequency cutoff. Provides an 18 dB-per-octave cutoff at 80 Hz. Helps eliminate floor

rumble and low-frequency room noise from heating and air conditioning systems. This

setting may also be used to compensate for proximity effect or to reduce low frequencies

that make an instrument sound dull or muddy.

Low frequency rolloff. Provides a 6 dB-per-octave rolloff filter at 115 Hz. Use this to

compensate for proximity effect or to reduce low frequencies that could make an instrument

sound dull or muddy.

Setting Attenuation

The attenuation switch lets you reduce the signal level without altering the frequency

response. This can prevent extremely loud sounds from overloading the microphone

circuitry.

0 dB For "quiet" to "normal" sound levels

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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.

−25 dB For use with in close proximity (less than 10 cm) to extremely loud sound sources

such as drums, horns, or loud guitar cabinets.

Load Impedance

Maximum SPL capability, output clipping level, and dynamic range vary with the input load

impedance of the preamplifier to which you connect the microphone. Shure recommends a

minimum input load impedance of 1000 Ω. Most modern microphone preamplifiers meet

this requirement. Higher impedance results in better performance for these specifications.

Stereo Pair Stand Adapter

Stereo microphone techniques give depth and spatial placement to sound sources for

broadcasting, recording, or sound reinforcement applications. The Shure A27M allows you

to mount two microphones on a single stand with a wide range of angles and vertical

separations for a variety of coincident and closely-spaced stereo configurations.

Installation

1. Adjust the vertical separation as shown.

2. Mount on a stand and attach microphones using 5/8"-27 thread stand adapters.

3. Adjust the microphone angle using the knurled knob. Use the 45 degree reference

marks at the top of the knob to set the desired angle.

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Stereo Techniques

The following table displays the most common stereo techniques. Keep in mind that

microphone technique is largely a matter of personal taste; there is no one “correct”

microphone position. For more information, search “Stereo Techniques” at www.shure.com

(www.shure.com/stereo-tech).

Specifications

Cartridge Type

Electret Condenser

Polar Pattern

Cardioid

Frequency Response

20 to 20,000Hz

Output Impedance

150Ω

Sensitivity

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Sensitivity

open circuit voltage, @ 1 kHz, typical

–37dBV/Pa[1] (14.1 mV)

Maximum SPL

1 kHz at 1% THD[2]

PAD ON

5000 Ω load 170dB

2500 Ω load 164dB

1000 Ω load 159dB

PAD OFF

5000 Ω load 145dB

2500 Ω load 139dB

1000 Ω load 134dB

Signal-to-Noise Ratio[3]

80dB

Dynamic Range

@ 1 kHz

5000 Ω load 131dB

2500 Ω load 125dB

1000 Ω load 120dB

Clipping Level

20Hz to 20kHz, 1% THD

5000 Ω load 15dBV

2500 Ω load 9dBV

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1000 Ω load 3dBV

Self Noise

equivalent SPL, A-weighted, typical

14dB SPL-A

Common Mode Rejection

10 to 100,000kHz

≥50dB

Attenuator Switch

0, -15, -25 dB

Low-Frequency Filter Switch

Flat, –6 dB/octave below 115 Hz, or –18 dB/octave below 80 Hz

Connector

Three-pin professional audio (XLR), male, balanced

Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3

Power Requirements

11–52VDC[4] phantom power (IEC-61938) 4.7mA, maximum

Net Weight

100g (3.5 oz.)

[1] 1 Pa=94 dB SPL

[2]THD of microphone preamplifier when applied input signal level is equivalent to cartridge

output at specified SPL

[3]S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-

weighted

[4]All specifications measured with a 48 Vdc phantom power supply. The microphone

operates at lower voltages, but with slightly decreased headroom and sensitivity.

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KSM137 User Guide

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Typical Frequency Response

Typical Polar Patterns

Overall Dimensions

Accessories

Note: KSM137/SL stereo only.

Furnished Accessories

Carrying Case for two KSM137 or KSM141 microphones and

A27M stereo bar A100C

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Foam Windscreen for KSM141 and KSM137 A100WS

Microphone Clip for AMS26, Beta 181, KSM137, KSM141,

MX412, MX418, MX412S, MX418S, MX412SE, MX418SE, SM62,

SM63, SM63L, SM63LB, SM81, VP64, VP64A, VP64AL and

standard microphone stands

A57F

Stereo Microphone Adapter A27M

Optional Accessories

Isolation Mount/Swivel Adapter for KSM109, KSM137,

KSM141, SM63, SM81, SM94 and VP64 A53M

Popper Stopper Pop Filter with Metal Gooseneck and

Microphone Stand Clamp

PS-6

Certifications

This product meets the Essential Requirements of all relevant European directives and is

eligible for CE marking.

The CE Declaration of Conformity can be obtained from:

www.shure.com/europe/compliance

Authorized European representative:

Shure Europe GmbH

Headquarters Europe, Middle East & Africa

Department: EMEA Approval

Jakob-Dieffenbacher-Str. 12

75031 Eppingen, Germany

Phone: 49-7262-92 49 0

Fax: 49-7262-92 49 11 4

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Email: [email protected]

Trademark Notices: The circular S logo, the stylized Shure logo, the word “Shure,” and

“ShureLock” are registered trademarks of Shure Incorporated in the United States. “Popper

Stopper” is a trademark of Shure Incorporated in the United States. “Mylar” is a registered

trademark of E.I. DuPont de Nemours and Company in the United States. These marks may

be registered in other jurisdictions.

Patent Notice: Patent Des. 479, 837

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