Shure KSM 137/SL End-Address Cardioid Condenser Microphone
Versatile, durable, and precise, the Shure KSM137 end-address condenser microphone is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar. 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.Key FeaturesA highly consistent cardioid polar patternUltra-thin, 2.5 micron, 24 karat gold-layered, low mass Mylar diaphragm for superior transient responseClass A, discrete, transformerless preamplifier for transparency, extremely fast transient response, no crossover distortion, and minimal harmonic and intermodulation distortionPremium electronic components, including gold-plated internal and external connectorsSubsonic filter eliminates low frequency rumble (less than 17 Hz) caused by mechanical vibrationFrequency response.Polar pattern.Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs)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 reduces background noise and counteracts proximity effectPerformance CharacteristicsExtended frequency responseLow self-noiseExceptional reproduction of low-frequency soundsCan withstand high sound pressure levels (SPL)High output levelNo crossover distortionUniform polar responseSuperior common mode rejection and suppression of RFI (radio frequency interference)ApplicationsSome typical applications for the KSM137 are listed below. Microphone use is a matter of personal taste and the KSM137 may be used for a variety of applications other than those listed.Acoustic instruments -- such as piano, guitar, drums, percussion, stringsWind instruments -- brass and woodwindLow frequency instruments -- such as double bass, electric bass, kick drumOverhead miking -- drums or percussionEnsembles -- choral or orchestralRoom ambiance pick-up -- guitar amplifier or drumsSpecificationsType: Permanently Biased CondenserFrequency Response: 20­ to 20,000 HzDirectional Polar Pattern: CardioidOutput Impedance: 150 ohms (actual)Attenuation Switch: 0 dB, 15 dB, or 25 dB attenuationLow Frequency Response Switch: Flat; ­6 db/octave below 115 Hz; -18 dB/octave below 80 HzPhantom Power: 48 Vdc +/- 4 Vdc (IEC­268­15/DIN 45 596), positive pins 2 and 3Current Drain: 4.65 mA typical at 48 VdcCommon Mode Rejection: ≥50 dB, 20 Hz to 20 kHzSensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL): -37 dBV/PaSelf­noise (typical, equivalent SPL; A-weighted, IEC 651): 14 dBPolarity: Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3Weight: 3.5 ounces