Shure KSM141/SL ไมโครโฟน สำหรับเครื่องดนตรี Dual-Pattern Instrument Microphone ไมโครโฟนรุ่นนี้เหมาะสำหรับรับเสียงเครื่องดนตรี เป็นรุ่นพิเศษที่สามารถเลือกปรับทิศทางการรับเสียงได้ สามารถเลือกทิศทางการรับเสียงได้ 2 แบบ คือ Cardioid และ Omnidirectional ตอบสนองความถี่ที่ 20Hz-20kHz Diaphragms แบบ Ultra-Thin Mylor เคลือบผิวด้วยทอง 24K หนา 2.5 Micron พร้อมภาคขยายสัญญาณไมโครโฟน แบบ Transformerless มีสวิตซ์ Low Frequency Filter แบบ 3 ระดับ และสวิตซ์ 15dB/25dB Attenuation KSM 141/SL Dual-Pattern Instrument Microphone condenser Recommended Uses Studio Ensemble Studio Instrument Orchestra/Strings Woodwinds Acoustic Guitar Acoustic Bass Guitar Amp Piano/Organ Cymbals Percussion Live Stereo Recording KSM141/SL Includes windscreen, carry case, champagne finish The KSM141 is a dual-pattern end-addressed condenser microphone with a rotating collar, allowing easy switching between a consistent cardioid or true omnidirectional polar pattern for smooth and extremely focused sound reproduction. Designed for studio use, yet rugged enough for live applications, the KSM141 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 mechanical polar pattern switch for highly consistent cardioid and true omnidirectional polar patterns. Provides flexibility in a wide variety of recording applications Ultra-thin, 2.5 micron, 24 karat gold-layered, low mass Mylar® diaphragm for superior transient response Class A, discrete, transformerless preamplifier for transparency, extremely fast transient response, no crossover distortion, and minimal harmonic and intermodulation distortion Premium electronic components, including gold-plated internal and external connectors Subsonic filter eliminates low frequency rumble (less than 17 Hz) caused by mechanical vibration Three-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs) Three-position switchable low-frequency filter to reduce background noise and counteract proximity effect 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 radio frequency interference Applications Some typical applications for the KSM141 are listed below. Microphone use, however, is a matter of personal taste. The KSM141 may be used for a variety of applications other than those listed. 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 ambiance pick-up -- guitar amplifier or drums Both the acoustic environment and microphone placement strongly affect the sound obtained from miking a source. You may need to experiment with microphone placement and room treatments to achieve the best overall sound for each application. SPECIFICATIONS Cartridge Type Permanently Biased Condenser Frequency Response 20 to 20,000 Hz Directional Polar Pattern Cardioid/Omnidirectional Output Impedance 150 ohms (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 (IEC26815/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 Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3 Dimensions and Weight 20 mm (0.8 in.) diameter, 146 mm (5.75 in.) long 156 grams (5.5 oz.) Sensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL) -37 dBV/Pa Selfnoise (typical, equivalent SPL; A-weighted, IEC 651) 14 dB Maximum SPL 5000 ohm load (Attenuator on): 145 (160, 170) dB 2500 ohm load (Attenuator on): 139 (154, 164) dB 1000 ohm load (Attenuator on): 134 (149, 159) dB Output Clipping Level* 5000 ohm load: 15 dBV 2500 ohm load: 9 dBV 1000 ohm load: 3 dBV *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. Dynamic Range 5000 ohm load: 131 dB 2500 ohm load: 125 dB 1000 ohm load: 120 dB Signal to Noise Ratio** 80 dB **S/N ratio is difference between 94 dB SPL and equivalent SPL of self-noise A-weighted.
