Shure Microphone ksm44 User Manual

User Guide  
©200 7, Shure Incorporated  
Printed in U.S.A.  
27E3122 (Rev. 1)  
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Low Frequency  
Response Switch  
Polar Pattern  
Switch  
KSM44  
FRONT  
KSM44  
BACK  
15 dB  
Attenuator  
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  
µm, 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.  
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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 ShureLockswivel 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.  
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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  
low-frequency filter switch and the 15dB attenuation switch.  
logo, the  
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.  
+5  
Low-frequency cutoff. Provides an 18  
0
dB-per-octave cutoff at 80 Hz. Helps eliminate  
stage rumble or low-frequency room noise from  
–10  
heating, ventilation, or cooling systems. May also  
be used to compensate for proximity effect or to  
reduce low frequencies that make an instrument  
2
3
4
5 6 789  
1000  
20  
50  
100Hz  
sound dull or muddy.  
Flat Response  
Low-Frequency Cutoff  
Low-Frequency Rolloff  
Low-frequency rolloff. Provides  
a
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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.  
FIGURE 2. LOW FREQUENCY FILTERS  
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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 Ω is 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 STOPPERPOP FILTER  
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SPECIFICATIONS  
Cartridge Type  
Externally biased condenser  
Frequency Response  
20 to 20,000 Hz  
(See Figures 4, 6, 8)  
Output Impedance  
Attenuation Switch  
150 Ω (actual)  
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  
Common Mode Rejection  
Polarity  
5.4 mA typical at 48 Vdc  
50 dB, 20 Hz to 20 kHz  
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  
-31 dBV/Pa  
7 dB  
-37 dBV/Pa  
10 dB  
-36 dBV/Pa  
10 dB  
(typical; at 1000 Hz; 1 Pa = 94 dB SPL)  
Self-noise  
(typical, equivalent SPL; A-weighted, IEC 651)  
Maximum SPL @ 1000 Hz  
2500 Ω load (Attenuator on)  
1000 Ω load (Attenuator on)  
132 (149) dB  
127 (144) dB  
138 (151) dB  
132 (145) dB  
137 (150) dB  
131 (144) dB  
Output Clipping Level*  
2500 Ω load  
7 dBV  
1 dBV  
7 dBV  
1 dBV  
7 dBV  
1 dBV  
1000 Ω load  
Dynamic Range  
2500 Ω load  
1000 Ω load  
125 dB  
120 dB  
128 dB  
122 dB  
127 dB  
121 dB  
Signal to Noise ratio**  
Dimensions and Weight  
87 dB  
84 dB  
84 dB  
55.9 mm (2.20 in.) maximum body diameter, 187 mm  
(7.37 in.) long; 490.5 grams (17.30 oz). See Figure 10.  
*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.  
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CARDIOID RESPONSE GRAPHS  
FIGURE 4. TYPICAL CARDIOID FREQUENCY RESPONSE  
FIGURE 5. TYPICAL CARDIOID POLAR PATTERN  
OMNIDIRECTIONAL RESPONSE GRAPHS  
15 cm.  
60 cm.  
FIGURE 6. TYPICAL OMNIDIRECTIONAL FREQUENCY RESPONSE  
FIGURE 7. TYPICAL OMNIDIRECTIONAL POLAR PATTERN  
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OMNIDIRECTIONAL RESPONSE GRAPHS  
FIGURE 8. TYPICAL BIDIRECTIONAL FREQUENCY RESPONSE  
FIGURE 9.TYPICAL BIDIRECTIONAL POLAR PATTERNS  
55.9 mm  
(2.20 IN.)  
187 mm  
(7.37 IN.)  
FIGURE 10. DIMENSIONS  
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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.  
N 108  
FURNISHED ACCESSORIES  
ShureLockChampagne Elastic Shock Mount . . . . . . . . . . . . . . . . . A44SM  
ShureLockChampagne Swivel Adapter. . . . . . . . . . . . . . . . . . . . . . . .A44M  
Aluminum Carrying Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A44SC  
Protective Velveteen Pouch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A44VB  
OPTIONAL ACCESSORIES  
Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A32WS  
Padded, Zippered Carrying Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A32ZB  
Popper StopperPop 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.  
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Trademark Notices: The circular S logo, the stylized Shure logo, and the word  
“Shure” are registered trademarks of Shure Incorporated in the United States.  
“Shure Lock” 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 447,131  
SHURE Incorporated http://www.shure.com  
United States, Canada, Latin America, Caribbean:  
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.  
Phone: 847-600-2000 U.S. Fax: 847-600-1212 Intl Fax: 847-600-6446  
Europe, Middle East, Africa:  
Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414  
Asia, Pacific:  
Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055  
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