Shure KSM137 Manuel utilisateur

User Guide

KSM137

SHURE INCORPORATED

KSM137 CARDIOID CONDENSER MICROPHONE

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

Applications Engineering at 847-866-2525, Monday through Friday, from 8:00 am to

4:30 pm, CST. In Europe, call 49-7131-72140. Our web address is www.shure.com.

Thank you for selecting the KSM137

Over 75 years of audio experience has contributed to making the KSM137

one of the finest microphones available.

Low Frequency

Response Switch

0/15/25 dB

Attenuation Switch

FIGURE 1. KSM137

GENERAL DESCRIPTION

The ShureRKSM137 is an end-address condenser microphone with a cardioid

polar pattern. Designed for studio use, yet rugged enough for live applications, the

KSM137 can withstand extremely high sound pressure levels (SPL). Its low

self-noise and extended frequency response make it ideal for recording musical

instruments.

FEATURES

SA highly consistent cardioid polar pattern

SUltra-thin, 2.5 µm, 24 karat gold-layered, low mass MylarRdiaphragm for

superior transient response

SClass A, discrete, transformerless preamplifier for transparency, extremely

fast transient response, no crossover distortion, and minimal harmonic and

intermodulation distortion

SPremium electronic components, including gold-plated internal and external

connectors

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

by mechanical vibration

SThree-position switchable pad (0 dB, 15 dB, and 25 dB) for handling

extremely high sound pressure levels (SPLs)

SThree-position switchable low-frequency filter reduces background noise

and counteracts proximity effect

PERFORMANCE CHARACTERISTICS

SExtended frequency response

SLow self-noise

SExceptional reproduction of low-frequency sounds

SCan withstand high sound pressure levels (SPL)

SHigh output level

SNo crossover distortion

SUniform polar response

SSuperior common mode rejection and suppression of RFI (radio frequency

interference)

MODEL VARIATIONS

KSM137/SL KSM137/SL ST PAIR

One KSM137 Condenser Microphone Two KSM137 Condenser Microphones

One A137C Carrying Case One A137SPC Carrying Case

One A100WS Windscreen Two A100WS Windscreens

One A57F Stand Mount Two A57F Stand Mounts

One European-threaded adapter that

mates the A57F to European–threaded

microphone stands

Two European-threaded adapters that

mate the A57F to European-threaded

microphone stands

APPLICATIONS

The KSM137 will produce superior results in any application requiring a high quality

microphone. Typical applications include:

SClose miking of acoustic instruments such as piano, guitar, violins, drums,

and percussion

SOverhead miking of drums and percussion instruments

SElectric guitar amplifiers

SBrass and woodwind instruments

SRoom ambience pick-up (guitar amplifier or drums)

SOrchestras, choirs, wind ensembles

SLow-frequency instruments such as double bass and kick drum

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 various room treatments.

USING THE KSM137

Mounting the Microphone

To secure the KSM137 to a floor stand or boom, thread the mount onto the

microphone stand and insert the microphone into the microphone clip.

Power Requirements

The KSM137 requires phantom power and performs best with a 48 Vdc supply

(IEC-268-15/DIN 45 596). It can operate on voltages as low as 11 Vdc, but headroom

and sensitivity will be decreased slightly.

NOTE: Most modern mixers provide phantom power.

Cable Connections

Use a cable with XLR connectors at each end.

Load Impedance

Shure recommends a load impedance of at least 1000 Ω. When used with modern

microphone preamplifiers rated at about 2500 Ω, the KSM137 provides higher

maximum SPL capability and output clipping level. When the attenuation switch is

set to the –25 dB position, the KSM137 can handle up to 164 dB SPL, and can

output +15 dBV into a load of 5000 Ωor greater.

Setting Low-Frequency Response

A three-position switch on the KSM137 lets you adjust the low frequency response

of the microphone. The low frequency filters can be used to reduce wind noise,

room noise, or proximity effect. Refer to Figure 2.

Flat response. This setting provides

the most natural sound reproduction

in most applicatons.

Low-frequency cutoff. This setting

provides an 18 dB-per-octave cutoff at

80 Hz. It helps eliminate floor rumble

and low-frequency noise produced by

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. This setting provides a 6 dB-per-octave rolloff at 115 Hz.

Use this setting to compensate for proximity effect or to reduce low frequencies

that could make an instrument sound dull or muddy.

ÑÑÑÑÑÑÑÑ

20 100050 100 98765432

–10

Low-Frequency Cutoff

Low-Frequency Rolloff

Flat Response

FIGURE 2. LOW FREQUENCY

RESPONSES

Setting Attenuation

The attenuation switch on the KSM137 lets you reduce the signal level by up to 25 dB

without altering frequency response. This can prevent extremely loud sounds from

overloading the microphone. Set the switch to the desired attenuation levels as follows:

0 dB – Move the switch to this position for “quiet” to “normal” sound levels.

-15 dB – Move the switch to this position when the microphone is approximately

0.75 meters (2 feet) from sound sources such as a kick drum, snare drum, or electric

guitar cabinet.

-25 dB – Move the switch to this position when the microphone is 4 inches (10 cm)

or less from extremely loud sound sources such as kick drum, snare drum, or guitar

cabinets.

SPECIFICATIONS

Cartridge Type Permanently Biased Condenser

Frequency Response 20–20,000 Hz (see Figure 3)

Directional Polar Pattern Cardioid (see Figure 4)

Output Impedance 150 Ω(actual)

Attenuation Switch 0 dB,15 dB, or 25 dB attenuation

Low Frequency Response Switch Flat; –6 db/octave below 115 Hz;

–18 dB/octave below 80 Hz

Phantom Power 48 Vdc±4 Vdc (IEC–268–15/DIN 45 596),

positive pins 2 and 3

Current Drain 4.65 mA typical at 48 Vdc

Common Mode Rejection ≥50 dB, 20 Hz to 20 kHz

Polarity Positive pressure on diaphragm produces positive

voltage on output pin 2 relative to pin 3

Dimensions and Weight 20 mm (0.8 in.) diameter, 122 mm (4.8 in.) long;

100 grams (3.5 oz.) (see Figure 5)

Sensitivity (typical, at 1000 Hz;

1 Pa = 94 dB SPL) –37 dBV/Pa

Self–noise (typical, equivalent SPL;

A-weighted, IEC 651) 14 dB

Maximum SPL at 1 kHz

5000 Ωload (Attenuator on)

2500 Ωload (Attenuator on)

1000 Ωload (Attenuator on)

145 (160, 170) dB

139 (154, 164) dB

134 (149, 159) dB

Output Clipping Level*

5000 Ωload

2500 Ωload

1000 Ωload

15 dBV

9 dBV

3 dBV

Dynamic Range

5000 Ωload

2500 Ωload

1000 Ωload

131 dB

125 dB

120 dB

Signal to Noise Ratio** 80 dB

*20 Hz to 20 kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge

output at specified SPL

**S/N ratio is difference between 94 dB SPL and equivalent SPL of self-noise A-weighted.

FIGURE 3. TYPICAL FREQUENCY RESPONSE

60 cm

FIGURE 4. TYPICAL POLAR PATTERNS

250 Hz

1000 Hz

2500 Hz

10000 Hz

500 Hz 6400 Hz

(0.8 IN)

FIGURE 5. DIMENSIONS

122 mm

(4.8 IN)

20 mm

CERTIFICATION

Eligible to bear CE Marking; conforms to European EMC directive 89/336/EEC.

Meets applicable tests and performance criteria found in European Professional

Audio Products EMC Standard EN 55103 (1996); Part 1 (Emissions) and Part 2

(Immunity). The KSM137 is intended for use in environments E1 (residential) and

E2 (Light Industrial) as defined in European standard EN 55103. EMC conformance

is based on the use of shielded interconnecting cable.

FURNISHED ACCESSORIES

Case A137C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Case (Stereo Pair) A137SPC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Windscreen A100WS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Microphone Clip A57F. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONAL ACCESSORIES

SHOCKSTOPPERtShock Mount A53M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SERVICE

For additional microphone service or parts information, please contact the Shure

Service Department at 1-800-516-2525. Outside the United States, please contact

your Authorized Shure Service Center.

27A3157 (Rev. 1)

E2003, Shure Incorporated

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

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

“SHOCKSTOPPER” 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 Des. 479,837

Printed in U.S.A.

SHURE Incorporated Web Address: http://www.shure.com

5800 W. Touhy Avenue, Niles, IL 60714–4608, U.S.A.

In U.S.A., Phone: 1–847–600–2000 Fax: 1–847–600–1212

In Europe, Phone: 49–7131–72140 Fax: 49–7131–721414

In Asia, Phone: 1–852–2893–4290 Fax: 1–852–2893–4055

International Fax: 1–847–600–6446

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