Shure KSM44 Bedienungsanleitung

27E3122 (Rev. 1)

User Guide

Printed in U.S.A.

SHURE INCORPORATED

KSM44 MULTIPLE POLAR PATTERN CONDENSER MICROPHONE

Thank you for selecting the KSM44

Over 75 years of audio experience has contributed to making the KSM44

one of the finest microphones available.

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

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

In Europe, call 49-7131-72140. Web address is www.shure.com.

FIGURE 1. KSM44 FRONT AND BACK

GENERAL DESCRIPTION

The Shure®KSM44 is a side-address condenser microphone with multiple polar

patterns (cardioid, omnidirectional, bidirectional). Designed for studio use, the

KSM44 has externally biased, dual 1-inch diaphragms, extremely low self-noise

and an extended frequency response specially tailored for vocal tracking and

instrument recording.

FEATURES

• Multiple polar patterns–cardioid, omnidirectional and bidirectional–for maximum

flexibility in a wide variety of recording applications.

• Dual 1 inch, externally biased, ultra-thin, 2.5

m, 24 Karat gold-layered, low

mass, Mylar

diaphragms provide superior frequency response

• Class A, discrete, transformerless preamplifier for transparency, extremely fast

transient response and no crossover distortion. Minimizes harmonic and inter-

modulation distortions.

• Premium electronic components and gold-plated internal and external

connectors.

• Subsonic filter eliminates rumble from mechanical vibration below 17 Hz.

• Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs).

• 3-position switchable low-frequency filter helps reduce unwanted background

noise or counteract proximity effect.

• Integrated three-stage “pop” protection grille reduces plosives and other breath

noise.

• Internal shock mount reduces handling and stand noise.

KSM44

FRONT

Polar Pattern

Switch

Low Frequency

Response Switch

15 dB

Attenuator

KSM44

BACK

PERFORMANCE CHARACTERISTICS

• Extended frequency response

• Ultra-low self noise

• Exceptional low-frequency reproduction

• High output level

• High input SPL capability

• No crossover distortion

• Extremely uniform polar response

• Superior common mode rejection and suppression of radio frequency

interference

APPLICATIONS

The KSM44 provides superior results in any application requiring a high quality

microphone. Some typical applications are listed below.

• Voice-solo, background, voice-over or broadcasting

• Acoustic instruments such as piano, guitar, drums, percussion, strings

• Wind instruments-brass and woodwind

• Low-frequency instruments such as double bass, electric bass, kick drum

• Overhead miking-drums or percussion

• Ensembles-choral or orchestral

• Room ambience pick-up-guitar amplifier or drums

Both the acoustic environment and microphone placement strongly affect the

sound obtained from miking a source, especially with a high-resolution microphone

like the KSM44. You may need to experiment with microphone placement, room

treatments and polar pattern to achieve the best overall sound for each application.

OPERATION

Mounting

Use either the ShureLock™swivel mount or the elastic shock mount to secure the

KSM44 to a floor or boom stand. When using the swivel mount, the internal shock

mount provides good isolation from vibration. For even greater reduction of noise

from external vibrations, use the elastic shock mount.

Important: When using the swivel mount or elastic shock mount, be sure that the

threaded, knurled locking grip is screwed securely onto the threads at the base of

the microphone. Do not overtighten.

Power

The KSM44 requires phantom power and performs optimally 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.

Positioning the Microphone

The front of the KSM44 is marked by the logo and the polar-pattern selec-

tion switch. See Figure 1. Position this side of the microphone toward the sound

source to be recorded. The rear of the microphone is marked by the logo, the

low-frequency filter switch and the 15dB attenuation switch.

Selecting a Polar Pattern

The three position switch on the front of the KSM44 sets the polar response pattern

of the microphone. The sensitivity of the microphone to sounds coming from different

angles varies according to this switch's setting.

Cardioid. Picks up sounds directly in front of the microphone and is least sensi-

tive to those in back. Cardioid is the most commonly used pattern in studio recording

and live-sound applications. See Figure 5.

Omnidirectional. Picks up sound equally from all directions. This pattern is

best for picking up room ambience and miking several sources at once, such as a

choir or ensemble. Omnidirectional patterns do not exhibit proximity effect. See

Figure 7.

Bidirectional. Picks up equally from the front and back of the microphone while

rejecting sounds from the sides. Bidirectional is often for stereo recording (such as

mid-side and Blumlein techniques). See Figure 9.

NOTE: As with all bidirectional microphones, sounds picked up from the front will be

in polarity with the source and those picked up from the back will be out of polarity

with the source.

Selecting Low-Frequency Response

A three-position switch on the back of the KSM44 allows you to adjust the low-fre-

quency response of the microphone, as shown in Figure 2. The low-frequency filter

settings can be used to reduce wind noise, room noise or proximity effect.

Flat response. Use this setting when you desire the most natural reproduction

of the source.

Low-frequency cutoff. Provides an 18

dB-per-octave cutoff at 80 Hz. Helps eliminate

stage rumble or low-frequency room noise from

heating, ventilation, or cooling systems. 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 115Hz. Use this setting

with vocals or instruments to compensate for

proximity effect or to reduce low frequencies that

could make an instrument sound dull or muddy.

20 100050 100

98765432

–10

Flat Response

Low-Frequency Cutoff

Low-Frequency Rolloff

FIGURE 2. LOW FREQUENCY FILTERS

Setting Attenuation

The attenuation switch on the back of the KSM44 reduces the signal level from

the cartridge by 15 dB without altering the frequency response. This can prevent

extremely high SPLs from overloading the microphone. To activate attenuation,

move the switch to the “-15 dB” position. Note: In situations where the high out-

put of the KSM44 might overload the microphone preamplifier of a console or

mixer, use an attenuation pad in the mixer.

Load Impedance

A load impedance of at least 1000 Ωis recommended. When used with typical

modern microphone preamplifiers (rated at about 2500 Ω), the KSM44 provides

higher maximum SPL capability and output clipping level. With the -15 dB pad

engaged, the KSM44 can handle up to 156 dB SPL and output +15 dBV into a

5500 ohm or greater load.

Integral Pop Filter

The KSM44 has an integral pop filter which helps reduce wind and breath noise.

An external pop-protection screen or windscreen may be necessary when

close-miking vocalists. The low-frequency cutoff filter may also be effective. See

Figure 3.

FIGURE 3.PS-6 POPPER STOPPER™POP FILTER

SPECIFICATIONS

*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.

Cartridge Type Externally biased condenser

Frequency Response 20 to 20,000 Hz

(See Figures 4, 6, 8)

Output Impedance 150 Ω(actual)

Attenuation Switch 0 or 15 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 5.4 mA typical at 48 Vdc

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

Polarity Positive pressure on front diaphragm produces

positive voltage on output pin 2 relative to pin 3

Directional Polar Patterns Cardioid

(See Figure 5) Omnidirectional

(See Figure 7) Bidirectional

(See Figure 9)

Sensitivity

(typical; at 1000 Hz; 1 Pa = 94 dB SPL) -31 dBV/Pa -37 dBV/Pa -36 dBV/Pa

Self-noise

(typical, equivalent SPL; A-weighted, IEC 651) 7 dB 10 dB 10 dB

Maximum SPL @ 1000 Hz

2500 Ωload (Attenuator on)

1000 Ωload (Attenuator on)

132 (149) dB

127 (144) dB 138 (151) dB

132 (145) dB 137 (150) dB

131 (144) dB

Output Clipping Level*

2500 Ωload

1000 Ωload

7 dBV

1 dBV 7 dBV

1 dBV

Dynamic Range

2500 Ωload

1000 Ωload

125 dB

120 dB 128 dB

122 dB 127 dB

121 dB

Signal to Noise ratio** 87 dB 84 dB 84 dB

Dimensions and Weight

55.9 mm (2.20 in.) maximum body diameter, 187 mm

(7.37 in.) long; 490.5 grams (17.30 oz). See Figure 10.

CARDIOID RESPONSE GRAPHS

FIGURE 4. TYPICAL CARDIOID FREQUENCY RESPONSE

FIGURE 5. TYPICAL CARDIOID POLAR PATTERN

OMNIDIRECTIONAL RESPONSE GRAPHS

FIGURE 6. TYPICAL OMNIDIRECTIONAL FREQUENCY RESPONSE

FIGURE 7. TYPICAL OMNIDIRECTIONAL POLAR PATTERN

15 cm.

60 cm.

OMNIDIRECTIONAL RESPONSE GRAPHS

FIGURE 8. TYPICAL BIDIRECTIONAL FREQUENCY RESPONSE

FIGURE 9.TYPICAL BIDIRECTIONAL POLAR PATTERNS

FIGURE 10. DIMENSIONS

55.9 mm

(2.20 IN.)

187 mm

(7.37 IN.)

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 KSM44 is intended for use in environments E1 (residential) and

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

ance is based on the use of shielded interconnecting cable.

FURNISHED ACCESSORIES

ShureLock™Champagne Elastic Shock Mount . . . . . . . . . . . . . . . . . A44SM

ShureLock™Champagne Swivel Adapter. . . . . . . . . . . . . . . . . . . . . . . .A44M

Aluminum Carrying Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A44SC

Protective Velveteen Pouch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A44VB

OPTIONAL ACCESSORIES

Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A32WS

Padded, Zippered Carrying Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A32ZB

Popper Stopper™ Pop Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PS-6

REPLACEMENT PARTS

Suspension Shock Mount Elastic Cord,

Champagne (contains one). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95B2125

SERVICE

For additional microphone service or parts information, contact Shure's Service

department at 1-800-516-2525. Outside the United States, contact your

Authorized Shure Service Center.

N 108

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