Shure KSM137 Manual de usuario

KSM137

Instrument Microphone

The Shure cardioid condenser microphone, KSM137, user guide.

Version: 2.0 (2023-K)

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Table of Contents

KSM137 Instrument Microphone 3

General Description 3

Features 3

Performance Characteristics 3

Model Variations 3

Applications 3

Power Requirements 4

Mounting the Microphone 4

Selecting Low-Frequency Response 4

Setting Attenuation 5

Load Impedance 5

Stereo Pair Stand Adapter 5

Installation 6

Stereo Techniques 6

Specifications 7

Accessories 9

Furnished Accessories 9

Optional Accessories 10

Certifications 10

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KSM137 

Instrument Microphone

General Description

TheKSM137isapremium,end-address,condensermicrophonewithacardioidpolarpatternengineeredforhighlycriticalstu-

dio 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lev-

els (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

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.

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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.

Mounting the Microphone

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re-

duce low frequencies that could make an instrument sound dull or muddy.

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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.

−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rein-

forcement 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.

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Installation

Adjust the vertical separation as shown.

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

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.

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).

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Specifications

Cartridge Type

Electret Condenser

Polar Pattern

Cardioid

Frequency Response

20to20,000Hz

Output Impedance

150Ω

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

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1000 Ω load 120dB

Clipping Level

20Hzto20kHz,1%THD

5000 Ω load 15dBV

2500 Ω load 9dBV

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speci-

fied 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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Typical Frequency Response

Typical Polar Patterns

Overall Dimensions

Accessories

Furnished Accessories

Carrying Case for two KSM137 or KSM141 microphones and A27M stereo bar A100C

Foam Windscreen for KSM141 and KSM137 A100WS

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Microphone Clip for AMS26, BETA181, 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

Note: KSM137/SL stereo only.

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

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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