The Shure KSM137/SL 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 makes it ideal for recording instruments.Versatile, durable, and precise, the KSM137/SL is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar. Highly consistent cardioid polar pattern 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 Switchable 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 effect Champagne finish Foam windscreen and carry case includedCheck out Shure’s Listening Lab to get the lowdown on this and every other Shure mic!