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 vibrationSwitchable 15 dB pad for handling extremely high sound pressure levels (SPLs)3-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs)3-position switchable low-frequency filter reduces background noise and counteracts proximity effectPerformance CharacteristicsExtended frequency responseExceptional reproduction of low-frequency soundsCan withstand high sound pressure levels (SPL)Superior common mode rejection and suppression of radio frequency interferenceCommon ApplicationsAcoustic 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 drumsThe KSM137 is an end-address condenser microphone with a single 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 instruments.Versatile, durable, and precise, the KSM137 is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar.