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KSM137
User Guide
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SHURE INCORPORATED KSM137 CARDIOID CONDENSER MICROPHONE Thank you for selecting the KSM137 Over 75 years of audio experience has contributed to making the KSM137 one of the finest microphones available. 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.
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0/15/25 dB Attenuation Switch Low Frequency Response Switch FIGURE 1. KSM137 GENERAL DESCRIPTION The Shure KSM137 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 A highly consistent cardioid polar pattern Ultra-thin, 2.5 m, 2
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PERFORMANCE CHARACTERISTICS Extended frequency response Low self-noise Exceptional reproduction of low-frequency sounds Can withstand high sound pressure levels (SPL) High output level No crossover distortion Uniform polar response Superior 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 A10
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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
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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, snar
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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
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60 cm FIGURE 3. TYPICAL FREQUENCY RESPONSE 2500 Hz 250 Hz 500 Hz 6400 Hz 1000 Hz 10000 Hz FIGURE 4. TYPICAL POLAR PATTERNS 20 mm (0.8 IN) 122 mm (4.8 IN) FIGURE 5. DIMENSIONS 7
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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 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 . . . .
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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. “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 SHURE Incorporated Web Address: http://www.shure.com 5800 W. Touhy Avenue, Niles, IL 60714–4608, U.S.
