Shure Headphones KSM109 User Manual

KSM109  
User Guide  
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0/15 dB  
Attenuation Switch  
FIGURE 1. THE KSM109  
GENERAL DESCRIPTION  
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The Shure KSM109 is an end-address condenser microphone with a cardioid  
polar pattern. Designed for studio use, yet rugged enough for live applications, the  
KSM109 delivers a clear reproduction of the origninal sound source. Its extended  
frequency response makes it ideal for recording musical instruments.  
FEATURES  
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Cardioid polar pattern to reduce the pickup of unwanted sounds  
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Ultra-thin, 2.5 µm, 24 karat gold-layered, low mass Mylar diaphragm for  
superior transient response  
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Class A, discrete, transformerless preamplifier for transparency, extremely  
fast transient response, no crossover distortion, and minimal harmonic and  
intermodulation distortion  
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Premium electronic components, including gold-plated internal and external  
connectors  
Two-position switchable pad (0 dB and 15 dB) for handling extremely high  
sound pressure levels (SPLs)  
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PERFORMANCE CHARACTERISTICS  
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Extended frequency response  
Low self-noise  
Can withstand high sound pressure levels (SPLs)  
High output level  
No crossover distortion  
Uniform polar response  
Superior common mode rejection and suppression of RFI (radio frequency  
interference)  
APPLICATIONS  
The KSM109 will produce superior results in any application requiring a high quality  
microphone. Typical applications include:  
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Close miking of acoustic instruments such as piano, guitar, violins, drums,  
and percussion  
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Overhead miking of drums and percussion instruments  
Electric guitar amplifiers  
Brass and woodwind instruments  
Orchestras, choirs, and wind ensembles  
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 .  
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USING THE KSM109  
Mounting the Microphone  
To secure the KSM109 to a floor stand or boom, thread the mount onto the  
microphone stand and insert the microphone into the mount.  
Power Requirements  
The KSM109 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 . When used with modern  
microphone preamplifiers rated at about 2500 , the KSM109 provides higher  
maximum SPL capability and output clipping level. When the attenuation switch is  
set to the 15 dB position, the KSM109 can handle up to 165 dB SPL, and can  
output +15 dBV into a load of 5000 or greater.  
Setting Attenuation  
The attenuation switch on the KSM109 lets you reduce the signal level by up to 15  
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 quietto normalsound 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 snare drum, or electric guitar  
cabinet.  
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SPECIFICATIONS  
Cartridge Type  
Permanently Biased Condenser  
2020,000 Hz (see Figure 2)  
Cardioid (see Figure 3)  
150 (actual)  
Frequency Response  
Directional Polar Pattern  
Output Impedance  
Attenuation Switch  
Phantom Power  
0 dB or 15 dB attenuation  
48 Vdc 4 Vdc (IEC26815/DIN 45 596),  
positive pins 2 and 3  
Current Drain  
Common Mode Rejection  
Polarity  
5.2 mA typical at 48 Vdc  
50 dB, 20 Hz to 20 kHz  
Positive pressure on diaphragm produces positive  
voltage on output pin 2 relative to pin 3  
Dimensions and Weight  
24 mm (0.950 in.) diameter, 162 mm (6.375 in.) long;  
195 grams (6.9 oz.) (see Figure 4)  
Sensitivity (typical, at 1000 Hz;  
1 Pa = 94 dB SPL)  
41 dBV/Pa  
Self–noise (typical, equivalent SPL;  
A-weighted (IEC 651))  
19 dB  
Maximum SPL*  
(Attenuator on)  
5000 W load  
2500 W load  
1000 W load  
150 (165) dB  
144 (159) dB  
139 (154) dB  
Output Clipping Level*  
5000 W load  
15 dBV  
9 dBV  
3 dBV  
2500 W load  
1000 W load  
Dynamic Range  
(Attenuator on)  
133 (136) dB  
128 (130) dB  
122 (125) dB  
5000 W load  
2500 W load  
1000 W load  
Signal to Noise Ratio**  
75 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 the difference between 94 dB SPL and equivalent SPL of self-noise A-weighted.  
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FIGURE 2. TYPICAL FREQUENCY RESPONSE  
FIGURE 3. TYPICAL POLAR PATTERNS  
24 mm  
(0.950 IN)  
162 mm  
(6.375 IN)  
FIGURE 4. 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 KSM109 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  
Vinyl Pouch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A109ZB  
Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3WS  
Microphone Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A25D  
OPTIONAL ACCESSORIES  
SHOCKSTOPPERt Shock Mount . . . . . . . . . . . . . . . . . . . . . . A55M, A55HM  
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.  
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Trademark Notices: The circular S logo, the stylized Shure logo, and the word  
Shureare registered trademarks of Shure Incorporated in the United States.  
SHOCKSTOPPERis a trademark of Shure Incorporated in the United States.  
Mylaris a registered trademark of E.I. duPont de Nemours and Company in the  
United States. These marks may be registered in other jurisdictions.  
E2002, Shure Incorporated  
Printed in U.S.A.  
27A3142 (BF)  
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