User Guide E2003, Shure Incorporated 27B3138 (Rev. 2) Printed in U.S.A.
SHURE INCORPORATED KSM27 CARDIOID CONDENSER MICROPHONE Thank you for selecting the KSM27 Over 75 years of audio experience has contributed to making the KSM27 one of the finest microphones available. If you have any questions that are 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.
Low-frequency response switch KSM27 FRONT KSM27 BACK 15 dB attenuator FIGURE 1. KSM27 FRONT AND BACK GENERAL DESCRIPTION The ShureR KSM27 is a side-address condenser microphone with a cardioid polar pattern. Designed for studio use but rugged enough for live applications, the KSM27 has an externally biased 1-inch diaphragm, extremely low self-noise, and an extended frequency response specially tailored for vocal tracking and instrument recording.
PERFORMANCE CHARACTERISTICS S S S S S S S S Extended frequency response 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 KSM27 produces superior results in any application requiring a high quality microphone.
Positioning the Microphone R logo. See Figure 1. Position this The front of the KSM27 is marked by the side of the microphone toward the sound source to be recorded. The rear of the logo, the low-frequency filter switch and the 15dB microphone is marked by the attenuation switch. Cardioid. Picks up sounds directly in front of the microphone and is least sensitive to those in back. Cardioid is the most commonly used polar pattern in studio recording and live-sound applications. See Figure 5.
Setting Attenuation The attenuation switch on the back of the KSM27 reduces the signal level from the cartridge by 15 dB without altering the frequency response. This can prevent extremely high SPLs (ie. close miked drums and guitar cabinets) from overloading the microphone. To activate attenuation, move the switch to the “-15 dB” position. 0 dB – Use this switch for “quiet” to “normal” sound levels.
SPECIFICATIONS Cartridge Type Externally Biased Condenser Frequency Response 20 to 20,000 Hz (see Figure 4) Directional Polar Pattern Cardioid (see Figure 5) Output Impedance EIA Rated at 150 Ω (140 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.
dB +10 0 –10 ÑÑÑÑÑÑÑÑÑÑÑÑÑÑ ÑÑÑÑÑÑÑÑÑÑÑÑÑ Ñ ÑÑÑÑÑÑÑÑÑÑ ÑÑÑÑÑÑÑÑÑÑÑÑÑÑ Ñ ÑÑÑÑÑÑÑÑÑÑ ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ ÑÑ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ ÑÑÑÑÑÑÑÑÑÑÑÑÑÑ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ ÑÑÑÑÑÑÑÑÑÑÑÑÑ ÑÑÑÑÑÑÑÑÑÑÑÑÑÑ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ ÑÑ ÑÑÑÑÑÑÑÑÑÑ 60 cm 20 50 100 2 3 4 5 6 7 89 1000 2 Hz 3 4 5 6 7 89 10000 20000 FIGURE 4. TYPICAL FREQUENCY RESPONSE FIGURE 5. TYPICAL POLAR PATTERNS 156,2 mm (6.15 IN.) 50,8 mm (2.00 IN.) 53,0 mm (2.08 IN.) 150,1 mm (5.90 IN.) FIGURE 6.
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 KSM27 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.
Trademark Notices: The circular S logo, the stylized Shure logo, and the word “Shure” are registered trademarks of Shure Incorporated in the United States. “ShureLock” 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. 400,540 Des.