The 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.